FIXED--was NOT the feedline
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HI all,
A postscript to the problem. First off, a huge thank you to the many replies received. I was fortunate that the problem was not in the KPA-1500 as I'd originally feared. Much troubleshooting within the past few days. Originally the amp was "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or wet weather. This prompted the replacement of both the antenna and feedline. The hard faults were still occurring, until it was suggested the Ten-Tec 238 tuner that I was using exclusively for the built-in antenna switch was now the issue. I took this out of line today, and lowered the tower to fine-tune the LFA's feed point and now everything is humming along just nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry conditions. I will keep my fingers crossed that the wet weather expected in the next day or so won't bother it all that much. The final step was to move the 6m feedline from the secondary inlet box to the main antenna switch on the big tower. The downside here is I now have an additional 70 feet of BuryFlex in the line, so I'm guessing a total of about 1.5 to 1.7dB of feedline loss. This is something I would like to address in the future with an eye to dropping it below 1dB. Screencaps: https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20switch.png?dl=0 And https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%20tuning.png?dl=0 And for the balun discussion, this is what's in place, before the double-walled heat-shrink was applied: https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl=0 - pjd ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Lovin' my K3S (S/N 10023)
73, Peter W2IRT |
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Hi,
Is the open end of that feedline where it connects to the antenna weatherproofed? 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/2/20 8:15 PM, Peter Dougherty wrote: > HI all, > > A postscript to the problem. First off, a huge thank you to the many replies received. I was fortunate that the problem was not in the KPA-1500 as I'd originally feared. > > Much troubleshooting within the past few days. Originally the amp was "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or wet weather. This prompted the replacement of both the antenna and feedline. > > The hard faults were still occurring, until it was suggested the Ten-Tec 238 tuner that I was using exclusively for the built-in antenna switch was now the issue. I took this out of line today, and lowered the tower to fine-tune the LFA's feed point and now everything is humming along just nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry conditions. I will keep my fingers crossed that the wet weather expected in the next day or so won't bother it all that much. > > The final step was to move the 6m feedline from the secondary inlet box to the main antenna switch on the big tower. The downside here is I now have an additional 70 feet of BuryFlex in the line, so I'm guessing a total of about 1.5 to 1.7dB of feedline loss. This is something I would like to address in the future with an eye to dropping it below 1dB. > > Screencaps: https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20switch.png?dl=0 > > And > > https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%20tuning.png?dl=0 > > And for the balun discussion, this is what's in place, before the double-walled heat-shrink was applied: https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl=0 > > - pjd > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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No, and I wasn't sure how to accomplish this. It's stainless hardware, but
I'm guessing I should probably wrap the feedpoint up in self-annealing tape and Scotch 88 just to be safe. - pjd -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Dave Cole Sent: Wednesday, June 3, 2020 7:27 AM To: [hidden email] Subject: Re: [Elecraft] FIXED--was NOT the feedline Hi, Is the open end of that feedline where it connects to the antenna weatherproofed? 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/2/20 8:15 PM, Peter Dougherty wrote: > HI all, > > A postscript to the problem. First off, a huge thank you to the many replies received. I was fortunate that the problem was not in the KPA-1500 as I'd originally feared. > > Much troubleshooting within the past few days. Originally the amp was "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or wet weather. This prompted the replacement of both the antenna and feedline. > > The hard faults were still occurring, until it was suggested the Ten-Tec 238 tuner that I was using exclusively for the built-in antenna switch was now the issue. I took this out of line today, and lowered the tower to fine-tune the LFA's feed point and now everything is humming along just nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry conditions. I will keep my fingers crossed that the wet weather expected in the next day or so won't bother it all that much. > > The final step was to move the 6m feedline from the secondary inlet box to the main antenna switch on the big tower. The downside here is I now have an additional 70 feet of BuryFlex in the line, so I'm guessing a total of about 1.5 to 1.7dB of feedline loss. This is something I would like to address in the future with an eye to dropping it below 1dB. > > Screencaps: > https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20s > witch.png?dl=0 > > And > > <a href="https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2">https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2 > 0tuning.png?dl=0 > > And for the balun discussion, this is what's in place, before the > double-walled heat-shrink was applied: > https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl > =0 > > - pjd > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Lovin' my K3S (S/N 10023)
73, Peter W2IRT |
Re: FIXED--was NOT the feedline
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I've got to get to class, but there are a NUMBER of different methods
and procedures that are used. Self-fusing tape properly applied covered by top-quality electrical tape to protect the self-fusing tape from UV... There are specific points on installation that you want to observe. Someone will chime in with deatil or a reference to a procedure... If not, I will do it later... Class in 3 minutes. 73, ______________________ Clay Autery, KY5G (318) 518-1389 On 06/03/20 10:35, Peter Dougherty wrote: > No, and I wasn't sure how to accomplish this. It's stainless hardware, but > I'm guessing I should probably wrap the feedpoint up in self-annealing tape > and Scotch 88 just to be safe. > > - pjd > > -----Original Message----- > From: [hidden email] <[hidden email]> On > Behalf Of Dave Cole > Sent: Wednesday, June 3, 2020 7:27 AM > To: [hidden email] > Subject: Re: [Elecraft] FIXED--was NOT the feedline > > Hi, > > Is the open end of that feedline where it connects to the antenna > weatherproofed? > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist > ARRL Asst. Director, NW Division, Technical Resources > > On 6/2/20 8:15 PM, Peter Dougherty wrote: >> HI all, >> >> A postscript to the problem. First off, a huge thank you to the many > replies received. I was fortunate that the problem was not in the KPA-1500 > as I'd originally feared. >> Much troubleshooting within the past few days. Originally the amp was > "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or > wet weather. This prompted the replacement of both the antenna and feedline. >> The hard faults were still occurring, until it was suggested the Ten-Tec > 238 tuner that I was using exclusively for the built-in antenna switch was > now the issue. I took this out of line today, and lowered the tower to > fine-tune the LFA's feed point and now everything is humming along just > nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry > conditions. I will keep my fingers crossed that the wet weather expected in > the next day or so won't bother it all that much. >> The final step was to move the 6m feedline from the secondary inlet box to > the main antenna switch on the big tower. The downside here is I now have an > additional 70 feet of BuryFlex in the line, so I'm guessing a total of about > 1.5 to 1.7dB of feedline loss. This is something I would like to address in > the future with an eye to dropping it below 1dB. >> Screencaps: >> https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20s >> witch.png?dl=0 >> >> And >> >> <a href="https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2">https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2 >> 0tuning.png?dl=0 >> >> And for the balun discussion, this is what's in place, before the >> double-walled heat-shrink was applied: >> https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl >> =0 >> >> - pjd >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net Please help support this email >> list: http://www.qsl.net/donate.html Message delivered to >> [hidden email] >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Peter W2IRT
On 6/3/2020 8:35 AM, Peter Dougherty wrote:
> No, and I wasn't sure how to accomplish this. It's stainless hardware, but > I'm guessing I should probably wrap the feedpoint up in self-annealing tape > and Scotch 88 just to be safe. Rescue Tape to the rescue. <rescuetape.com> - also available from the Amazing place. Originally developed as a repair tape, it's stretchable, self-sealing, high insulation rated, UV resistant, comes in several colors for easy ID, and no residue when removed. I had several antenna feed points wrapped with it and after 10+ years the connectors underneath were as bright and shiny as they were when first installed. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Clay Autery-2
Electrical tape, then the self-fusing tape, then electrical tape. The
first layer of electrical tape makes it easier to removing the fusing tape later Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com On 6/3/2020 12:58 PM, Clay Autery wrote: > I've got to get to class, but there are a NUMBER of different methods > and procedures that are used. > > Self-fusing tape properly applied covered by top-quality electrical tape > to protect the self-fusing tape from UV... > There are specific points on installation that you want to observe. > > Someone will chime in with deatil or a reference to a procedure... If > not, I will do it later... Class in 3 minutes. > > 73, > > ______________________ > Clay Autery, KY5G > (318) 518-1389 > > On 06/03/20 10:35, Peter Dougherty wrote: >> No, and I wasn't sure how to accomplish this. It's stainless hardware, >> but >> I'm guessing I should probably wrap the feedpoint up in self-annealing >> tape >> and Scotch 88 just to be safe. >> >> - pjd >> >> -----Original Message----- >> From: [hidden email] >> <[hidden email]> On >> Behalf Of Dave Cole >> Sent: Wednesday, June 3, 2020 7:27 AM >> To: [hidden email] >> Subject: Re: [Elecraft] FIXED--was NOT the feedline >> >> Hi, >> >> Is the open end of that feedline where it connects to the antenna >> weatherproofed? >> >> 73, and thanks, >> Dave (NK7Z) >> https://www.nk7z.net >> ARRL Volunteer Examiner >> ARRL Technical Specialist >> ARRL Asst. Director, NW Division, Technical Resources >> >> On 6/2/20 8:15 PM, Peter Dougherty wrote: >>> HI all, >>> >>> A postscript to the problem. First off, a huge thank you to the many >> replies received. I was fortunate that the problem was not in the >> KPA-1500 >> as I'd originally feared. >>> Much troubleshooting within the past few days. Originally the amp was >> "iffy" on the old M-squared 6m5, and problematic (faulting) during >> damp or >> wet weather. This prompted the replacement of both the antenna and >> feedline. >>> The hard faults were still occurring, until it was suggested the Ten-Tec >> 238 tuner that I was using exclusively for the built-in antenna switch >> was >> now the issue. I took this out of line today, and lowered the tower to >> fine-tune the LFA's feed point and now everything is humming along just >> nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry >> conditions. I will keep my fingers crossed that the wet weather >> expected in >> the next day or so won't bother it all that much. >>> The final step was to move the 6m feedline from the secondary inlet >>> box to >> the main antenna switch on the big tower. The downside here is I now >> have an >> additional 70 feet of BuryFlex in the line, so I'm guessing a total of >> about >> 1.5 to 1.7dB of feedline loss. This is something I would like to >> address in >> the future with an eye to dropping it below 1dB. >>> Screencaps: >>> https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20s >>> witch.png?dl=0 >>> >>> And >>> >>> <a href="https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2">https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2 >>> 0tuning.png?dl=0 >>> >>> And for the balun discussion, this is what's in place, before the >>> double-walled heat-shrink was applied: >>> https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl >>> =0 >>> >>> - pjd >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net Please help support this email >>> list: http://www.qsl.net/donate.html Message delivered to >>> [hidden email] >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message >> delivered to [hidden email] >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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To make it come off *really* clean, I like to put the 1st layer of vinyl tape sticky side out. Then self-fusing tape, another layer of vinyl tape (3m 33+ or 88). And because overkill is never enough, paint with some Scotchkote last!
73 Josh W6XU Sent from my mobile device >> On Jun 3, 2020, at 12:50 PM, Buck <[hidden email]> wrote: > Electrical tape, then the self-fusing tape, then electrical tape. The first layer of electrical tape makes it easier to removing the fusing tape later ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Clay Autery-2
For PL-259 or Type-N to female connections outside my standard practice is
either double-wall marine grade heat shrink, or Scotch-130 self-annealing tape (probably the same stuff as the 3M 2155) and the marine grade heat shrink. We had a line of storms headed this way after I read your post, and I decided to lower/tilt the tower over, and I wrapped the screw ends of the balun with Scotch 130 and Super 88. Not sure what got into me when I put the antenna up; I guess I figured SS hardware shouldn't be a problem in the elements, but yeah, better safe than sorry. - pjd -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Walter Underwood Sent: Wednesday, June 3, 2020 1:10 PM To: Elecraft Reflector <[hidden email]> Subject: Re: [Elecraft] FIXED--was NOT the feedline I use the weatherproofing described here. I think this practice has a long history in telephone wiring. It is a detailed walk-through of what you described. https://static.dxengineering.com/pdf/WeatherProofingCoax-TechTip.pdf <https://static.dxengineering.com/pdf/WeatherProofingCoax-TechTip.pdf> wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jun 3, 2020, at 9:58 AM, Clay Autery <[hidden email]> wrote: > > I've got to get to class, but there are a NUMBER of different methods and procedures that are used. > > Self-fusing tape properly applied covered by top-quality electrical tape to protect the self-fusing tape from UV... > There are specific points on installation that you want to observe. > > Someone will chime in with deatil or a reference to a procedure... If not, I will do it later... Class in 3 minutes. > > 73, > > ______________________ > Clay Autery, KY5G > (318) 518-1389 > > On 06/03/20 10:35, Peter Dougherty wrote: >> No, and I wasn't sure how to accomplish this. It's stainless >> hardware, but I'm guessing I should probably wrap the feedpoint up in >> self-annealing tape and Scotch 88 just to be safe. >> >> - pjd >> >> -----Original Message----- >> From: [hidden email] >> <[hidden email]> On Behalf Of Dave Cole >> Sent: Wednesday, June 3, 2020 7:27 AM >> To: [hidden email] >> Subject: Re: [Elecraft] FIXED--was NOT the feedline >> >> Hi, >> >> Is the open end of that feedline where it connects to the antenna >> weatherproofed? >> >> 73, and thanks, >> Dave (NK7Z) >> https://www.nk7z.net >> ARRL Volunteer Examiner >> ARRL Technical Specialist >> ARRL Asst. Director, NW Division, Technical Resources >> >> On 6/2/20 8:15 PM, Peter Dougherty wrote: >>> HI all, >>> >>> A postscript to the problem. First off, a huge thank you to the many >> replies received. I was fortunate that the problem was not in the >> KPA-1500 as I'd originally feared. >>> Much troubleshooting within the past few days. Originally the amp >>> was >> "iffy" on the old M-squared 6m5, and problematic (faulting) during >> damp or wet weather. This prompted the replacement of both the antenna >>> The hard faults were still occurring, until it was suggested the >>> Ten-Tec >> 238 tuner that I was using exclusively for the built-in antenna >> switch was now the issue. I took this out of line today, and lowered >> the tower to fine-tune the LFA's feed point and now everything is >> humming along just nicely. The KPA-1500 is happy at 1.5 kW and >> showing an SWR of 1.2 in dry conditions. I will keep my fingers >> crossed that the wet weather expected in the next day or so won't bother it all that much. >>> The final step was to move the 6m feedline from the secondary inlet >>> box to >> the main antenna switch on the big tower. The downside here is I now >> have an additional 70 feet of BuryFlex in the line, so I'm guessing a >> total of about >> 1.5 to 1.7dB of feedline loss. This is something I would like to >> address in the future with an eye to dropping it below 1dB. >>> Screencaps: >>> <a href="https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%2">https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%2 >>> 0s >>> witch.png?dl=0 >>> >>> And >>> >>> https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after >>> %2 >>> 0tuning.png?dl=0 >>> >>> And for the balun discussion, this is what's in place, before the >>> double-walled heat-shrink was applied: >>> https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg? >>> dl >>> =0 >>> >>> - pjd >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net Please help support this >>> list: http://www.qsl.net/donate.html Message delivered to >>> [hidden email] >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html Message delivered to >> [hidden email] >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html Message delivered to >> [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Lovin' my K3S (S/N 10023)
73, Peter W2IRT |
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In reply to this post by Josh Fiden
A layer of friction tape is also a good way to keep the connectors sticky free.
Dave wo2x -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Josh Fiden Sent: Wednesday, June 3, 2020 4:35 PM To: Elecraft Reflector <[hidden email]> Subject: Re: [Elecraft] FIXED--was NOT the feedline To make it come off *really* clean, I like to put the 1st layer of vinyl tape sticky side out. Then self-fusing tape, another layer of vinyl tape (3m 33+ or 88). And because overkill is never enough, paint with some Scotchkote last! 73 Josh W6XU Sent from my mobile device >> On Jun 3, 2020, at 12:50 PM, Buck <[hidden email]> wrote: > Electrical tape, then the self-fusing tape, then electrical tape. > The first layer of electrical tape makes it easier to removing the > fusing tape later ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Dave, Try Josh's technique, you won't regret it. But I never use Scotchkote because UV very quickly destroys it. 73 Frank W3LPL ----- Original Message ----- From: [hidden email] To: "Josh Fiden" <[hidden email]>, "Elecraft Reflector" <[hidden email]> Sent: Wednesday, June 3, 2020 11:08:51 PM Subject: Re: [Elecraft] FIXED--was NOT the feedline A layer of friction tape is also a good way to keep the connectors sticky free. Dave wo2x -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Josh Fiden Sent: Wednesday, June 3, 2020 4:35 PM To: Elecraft Reflector <[hidden email]> Subject: Re: [Elecraft] FIXED--was NOT the feedline To make it come off *really* clean, I like to put the 1st layer of vinyl tape sticky side out. Then self-fusing tape, another layer of vinyl tape (3m 33+ or 88). And because overkill is never enough, paint with some Scotchkote last! 73 Josh W6XU Sent from my mobile device >> On Jun 3, 2020, at 12:50 PM, Buck <[hidden email]> wrote: > Electrical tape, then the self-fusing tape, then electrical tape. > The first layer of electrical tape makes it easier to removing the > fusing tape later ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Buck
I have used a very thick non migrating silicone vacuum grease on the UHF connectors in the past to waterproof them. I put some on the threads and on the rear of the center section that the barrel pushes against. They have been up at 40 feet in all kinds of weather for 30 years with no problems. I considered tape, etc. but it seemed that if some water got in, it would have difficulty getting out. Better to not provide a container for water.
Jack BMW Motorcycles Chuck KE9UW [hidden email] Sent from my iPad > On Jun 3, 2020, at 2:50 PM, Buck <[hidden email]> wrote: > > Electrical tape, then the self-fusing tape, then electrical tape. The first layer of electrical tape makes it easier to removing the fusing tape later > > Buck, k4ia > Honor Roll > 8BDXCC > EasyWayHamBooks.com > >> On 6/3/2020 12:58 PM, Clay Autery wrote: >> I've got to get to class, but there are a NUMBER of different methods and procedures that are used. >> Self-fusing tape properly applied covered by top-quality electrical tape to protect the self-fusing tape from UV... >> There are specific points on installation that you want to observe. >> Someone will chime in with deatil or a reference to a procedure... If not, I will do it later... Class in 3 minutes. >> 73, >> ______________________ >> Clay Autery, KY5G >> (318) 518-1389 >>> On 06/03/20 10:35, Peter Dougherty wrote: >>> No, and I wasn't sure how to accomplish this. It's stainless hardware, but >>> I'm guessing I should probably wrap the feedpoint up in self-annealing tape >>> and Scotch 88 just to be safe. >>> >>> - pjd >>> >>> -----Original Message----- >>> From: [hidden email] <[hidden email]> On >>> Behalf Of Dave Cole >>> Sent: Wednesday, June 3, 2020 7:27 AM >>> To: [hidden email] >>> Subject: Re: [Elecraft] FIXED--was NOT the feedline >>> >>> Hi, >>> >>> Is the open end of that feedline where it connects to the antenna >>> weatherproofed? >>> >>> 73, and thanks, >>> Dave (NK7Z) >>> https://www.nk7z.net >>> ARRL Volunteer Examiner >>> ARRL Technical Specialist >>> ARRL Asst. Director, NW Division, Technical Resources >>> >>> On 6/2/20 8:15 PM, Peter Dougherty wrote: >>>> HI all, >>>> >>>> A postscript to the problem. First off, a huge thank you to the many >>> replies received. I was fortunate that the problem was not in the KPA-1500 >>> as I'd originally feared. >>>> Much troubleshooting within the past few days. Originally the amp was >>> "iffy" on the old M-squared 6m5, and problematic (faulting) during damp or >>> wet weather. This prompted the replacement of both the antenna and feedline. >>>> The hard faults were still occurring, until it was suggested the Ten-Tec >>> 238 tuner that I was using exclusively for the built-in antenna switch was >>> now the issue. I took this out of line today, and lowered the tower to >>> fine-tune the LFA's feed point and now everything is humming along just >>> nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry >>> conditions. I will keep my fingers crossed that the wet weather expected in >>> the next day or so won't bother it all that much. >>>> The final step was to move the 6m feedline from the secondary inlet box to >>> the main antenna switch on the big tower. The downside here is I now have an >>> additional 70 feet of BuryFlex in the line, so I'm guessing a total of about >>> 1.5 to 1.7dB of feedline loss. This is something I would like to address in >>> the future with an eye to dropping it below 1dB. >>>> Screencaps: >>>> https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20s >>>> witch.png?dl=0 >>>> >>>> And >>>> >>>> <a href="https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2">https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2 >>>> 0tuning.png?dl=0 >>>> >>>> And for the balun discussion, this is what's in place, before the >>>> double-walled heat-shrink was applied: >>>> https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl >>>> =0 >>>> >>>> - pjd >>>> >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[hidden email] >>>> >>>> This list hosted by: http://www.qsl.net Please help support this email >>>> list: http://www.qsl.net/donate.html Message delivered to >>>> [hidden email] >>>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html Message >>> delivered to [hidden email] >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [hidden email] >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Chuck, KE9UW
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In reply to this post by Clay Autery-2
On 6/3/2020 9:58 AM, Clay Autery wrote:
> Self-fusing tape properly applied covered by top-quality electrical tape > to protect the self-fusing tape from UV... This is what I and several friends have been doing for a while, and we think it works well. The self-fusing tape we use is Rescue Tape. The covering tape is Scotch 88. It's also FAR easier than 3M mastic tape to open up if you need to change something. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by donovanf
On 6/3/2020 4:26 PM, [hidden email] wrote:
> But I never use Scotchkote > because UV very quickly destroys it. Frank, Do you have experience with Liquid Electrical Tape? We've been using it to seal exposed ends of choke splices for a year or two, not enough to see issues if there are any. Our applications are the dipole centers with chokes and inline chokes as we showed in the 2018 Cookbook. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Hi Jim,
I've had good success with liquid electrical tape, but I use it only as a last resort when Scotch 130C and Scotch 33 or 88 can't be used 73 Frank W3LPL ----- Original Message ----- From: "Jim Brown" <[hidden email]> To: [hidden email] Sent: Thursday, June 4, 2020 4:25:24 AM Subject: Re: [Elecraft] FIXED--was NOT the feedline On 6/3/2020 4:26 PM, [hidden email] wrote: > But I never use Scotchkote > because UV very quickly destroys it. Frank, Do you have experience with Liquid Electrical Tape? We've been using it to seal exposed ends of choke splices for a year or two, not enough to see issues if there are any. Our applications are the dipole centers with chokes and inline chokes as we showed in the 2018 Cookbook. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Phil Kane-2
Use Scotch 130, better than rescue tape.
73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/3/20 11:50 AM, Phil Kane wrote: > On 6/3/2020 8:35 AM, Peter Dougherty wrote: > >> No, and I wasn't sure how to accomplish this. It's stainless hardware, but >> I'm guessing I should probably wrap the feedpoint up in self-annealing tape >> and Scotch 88 just to be safe. > > Rescue Tape to the rescue. <rescuetape.com> - also available from the > Amazing place. > > Originally developed as a repair tape, it's stretchable, self-sealing, > high insulation rated, UV resistant, comes in several colors for easy > ID, and no residue when removed. I had several antenna feed points > wrapped with it and after 10+ years the connectors underneath were as > bright and shiny as they were when first installed. > > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > From a Clearing in the Silicon Forest > Beaverton (Washington County) Oregon > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Buck
I always use Scotch 130, (self fusing tape), first, then Scotch 88. I
cut the tape down the long axis, and it opes up like a peanut, leaving no residue or old tape. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/3/20 12:48 PM, Buck wrote: > Electrical tape, then the self-fusing tape, then electrical tape. The > first layer of electrical tape makes it easier to removing the fusing > tape later > > Buck, k4ia > Honor Roll > 8BDXCC > EasyWayHamBooks.com > > On 6/3/2020 12:58 PM, Clay Autery wrote: >> I've got to get to class, but there are a NUMBER of different methods >> and procedures that are used. >> >> Self-fusing tape properly applied covered by top-quality electrical >> tape to protect the self-fusing tape from UV... >> There are specific points on installation that you want to observe. >> >> Someone will chime in with deatil or a reference to a procedure... If >> not, I will do it later... Class in 3 minutes. >> >> 73, >> >> ______________________ >> Clay Autery, KY5G >> (318) 518-1389 >> >> On 06/03/20 10:35, Peter Dougherty wrote: >>> No, and I wasn't sure how to accomplish this. It's stainless >>> hardware, but >>> I'm guessing I should probably wrap the feedpoint up in >>> self-annealing tape >>> and Scotch 88 just to be safe. >>> >>> - pjd >>> >>> -----Original Message----- >>> From: [hidden email] >>> <[hidden email]> On >>> Behalf Of Dave Cole >>> Sent: Wednesday, June 3, 2020 7:27 AM >>> To: [hidden email] >>> Subject: Re: [Elecraft] FIXED--was NOT the feedline >>> >>> Hi, >>> >>> Is the open end of that feedline where it connects to the antenna >>> weatherproofed? >>> >>> 73, and thanks, >>> Dave (NK7Z) >>> https://www.nk7z.net >>> ARRL Volunteer Examiner >>> ARRL Technical Specialist >>> ARRL Asst. Director, NW Division, Technical Resources >>> >>> On 6/2/20 8:15 PM, Peter Dougherty wrote: >>>> HI all, >>>> >>>> A postscript to the problem. First off, a huge thank you to the many >>> replies received. I was fortunate that the problem was not in the >>> KPA-1500 >>> as I'd originally feared. >>>> Much troubleshooting within the past few days. Originally the amp was >>> "iffy" on the old M-squared 6m5, and problematic (faulting) during >>> damp or >>> wet weather. This prompted the replacement of both the antenna and >>> feedline. >>>> The hard faults were still occurring, until it was suggested the >>>> Ten-Tec >>> 238 tuner that I was using exclusively for the built-in antenna >>> switch was >>> now the issue. I took this out of line today, and lowered the tower to >>> fine-tune the LFA's feed point and now everything is humming along just >>> nicely. The KPA-1500 is happy at 1.5 kW and showing an SWR of 1.2 in dry >>> conditions. I will keep my fingers crossed that the wet weather >>> expected in >>> the next day or so won't bother it all that much. >>>> The final step was to move the 6m feedline from the secondary inlet >>>> box to >>> the main antenna switch on the big tower. The downside here is I now >>> have an >>> additional 70 feet of BuryFlex in the line, so I'm guessing a total >>> of about >>> 1.5 to 1.7dB of feedline loss. This is something I would like to >>> address in >>> the future with an eye to dropping it below 1dB. >>>> Screencaps: >>>> https://www.dropbox.com/s/1y4vyd17pbgq8ty/6m%20via%20the%20antenna%20s >>>> witch.png?dl=0 >>>> >>>> And >>>> >>>> <a href="https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2">https://www.dropbox.com/s/5x8n0bum4nwcxqp/6m%20LFA%20-%20SWR%20after%2 >>>> 0tuning.png?dl=0 >>>> >>>> And for the balun discussion, this is what's in place, before the >>>> double-walled heat-shrink was applied: >>>> https://www.dropbox.com/s/18pgthl67rtq3bl/2020-05-31%2017.51.08.jpg?dl >>>> =0 >>>> >>>> - pjd >>>> >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[hidden email] >>>> >>>> This list hosted by: http://www.qsl.net Please help support this email >>>> list: http://www.qsl.net/donate.html Message delivered to >>>> [hidden email] >>>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message >>> delivered to [hidden email] >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [hidden email] >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by donovanf
After taping up the feed point connection on my LFA, I coated
it with liquid tape. Did some maintenance on it 6 years later and the connection was still secure and showed little evidence of UV deterioration. John. On 03/06/2020 9:52 p.m., [hidden email] wrote: > Hi Jim, > > > I've had good success with liquid electrical tape, but I use it only > as a last resort when Scotch 130C and Scotch 33 or 88 can't > be used > > > 73 > Frank > W3LPL > > ----- Original Message ----- > > From: "Jim Brown" <[hidden email]> > To: [hidden email] > Sent: Thursday, June 4, 2020 4:25:24 AM > Subject: Re: [Elecraft] FIXED--was NOT the feedline > > On 6/3/2020 4:26 PM, [hidden email] wrote: >> But I never use Scotchkote >> because UV very quickly destroys it. > Frank, > > Do you have experience with Liquid Electrical Tape? We've been using it > to seal exposed ends of choke splices for a year or two, not enough to > see issues if there are any. Our applications are the dipole centers > with chokes and inline chokes as we showed in the 2018 Cookbook. > > 73, Jim K9YC > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: FIXED--was NOT the feedline
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In reply to this post by Peter W2IRT
My two cents worth:
Professionally, I used a layer of Scotch-70 self-fusing tape covered by two layers of Scoth-33+ black electric tape. This was on coax cable connectors on small vessels that were in salt-water exposure. Removing 5-years afterward, connectors were still bright,dry, and looking like new. Scotch-70 is expensive (I paid $30 per roll over ten years ago for it). But when you got guys on board a 26-foot boat in the North Pacific with very high seas (like 30-foot) you want their Marine Radio to work. At home, I use heat shrink with two layers of Scotch-33+ fairly reliably. If things are too close to wrap with tape then a layer of Scotch-Kote seals heat shrink, thoroughly. I don't use sticky, messy stuff like Coax Seal. Scotch-70 molds into a seamless covering and slits easily with a razor knife. Some large coax connectors are supplied with heat shrink that has a melted inner "goo" which is very good sealant. I've found removal is not messy so apparently the "goo" cures in some manner. Pretty sure you can buy it at commercial electrical suppliers (but probably in 4-foot chunks which will cost you). I buy my ordinary heat shrink and tywraps (Thomas & Betts) from a local commercial electrical supply house. When temperatures dip to -30F the cheap stuff gets brittle and breaks. That's not when I want to climb a tower. 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Scotch-70 is $17.50 a roll on Amazon -
https://www.amazon.com/Scotch-70-Self-Fusing-Silicone-Electrical/dp/B0029Z5RSY On Thu, Jun 4, 2020 at 3:36 AM Edward R Cole <[hidden email]> wrote: > My two cents worth: > > Professionally, I used a layer of Scotch-70 self-fusing tape covered > by two layers of Scoth-33+ black electric tape. This was on coax > cable connectors on small vessels that were in salt-water > exposure. Removing 5-years afterward, connectors were still > bright,dry, and looking like new. > > Scotch-70 is expensive (I paid $30 per roll over ten years ago for > it). But when you got guys on board a 26-foot boat in the North > Pacific with very high seas (like 30-foot) you want their Marine Radio to > work. > > At home, I use heat shrink with two layers of Scotch-33+ fairly > reliably. If things are too close to wrap with tape then a layer of > Scotch-Kote seals heat shrink, thoroughly. > > I don't use sticky, messy stuff like Coax Seal. Scotch-70 molds into > a seamless covering and slits easily with a razor knife. > > Some large coax connectors are supplied with heat shrink that has a > melted inner "goo" which is very good sealant. I've found removal is > not messy so apparently the "goo" cures in some manner. Pretty sure > you can buy it at commercial electrical suppliers (but probably in > 4-foot chunks which will cost you). I buy my ordinary heat shrink > and tywraps (Thomas & Betts) from a local commercial electrical supply > house. > > When temperatures dip to -30F the cheap stuff gets brittle and > breaks. That's not when I want to climb a tower. > > 73, Ed - KL7UW > http://www.kl7uw.com > Dubus-NA Business mail: > [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > -- --... ...-- Doug ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Edward R Cole
Time to put some of my current heatshrink on an old connector and throw
it in the freezer, thanks for the tip!!! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/4/20 12:35 AM, Edward R Cole wrote: > My two cents worth: > > Professionally, I used a layer of Scotch-70 self-fusing tape covered by > two layers of Scoth-33+ black electric tape. This was on coax cable > connectors on small vessels that were in salt-water exposure. Removing > 5-years afterward, connectors were still bright,dry, and looking like new. > > Scotch-70 is expensive (I paid $30 per roll over ten years ago for it). > But when you got guys on board a 26-foot boat in the North Pacific with > very high seas (like 30-foot) you want their Marine Radio to work. > > At home, I use heat shrink with two layers of Scotch-33+ fairly > reliably. If things are too close to wrap with tape then a layer of > Scotch-Kote seals heat shrink, thoroughly. > > I don't use sticky, messy stuff like Coax Seal. Scotch-70 molds into a > seamless covering and slits easily with a razor knife. > > Some large coax connectors are supplied with heat shrink that has a > melted inner "goo" which is very good sealant. I've found removal is > not messy so apparently the "goo" cures in some manner. Pretty sure you > can buy it at commercial electrical suppliers (but probably in 4-foot > chunks which will cost you). I buy my ordinary heat shrink and tywraps > (Thomas & Betts) from a local commercial electrical supply house. > > When temperatures dip to -30F the cheap stuff gets brittle and breaks. > That's not when I want to climb a tower. > > 73, Ed - KL7UW > http://www.kl7uw.com > Dubus-NA Business mail: > [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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