Self-fusing liquid electrical tape
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Re: Self-fusing liquid electrical tape
 
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That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. 73, Don W3FPR On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: > Just look at $11.00 per ground rod connection for Cad-Weld as compared > to $1.98 for a mechanical clamp. Which do you think a ham will choose ? > ______________________________________________________________ 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: Self-fusing liquid electrical tape
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In reply to this post by Bob McGraw - K4TAX
1 TOWER 6000-20 k 1HOLE WITH CONCRETE $1000
HUNDREDS OF FEET OF LMR 600 , RG213 ETC 4 ANTENNAS $1600 ROTOR 1600 cadwelds for the 9 10 BURIED ground rods....at the tower and few more at the house MUST be in the budget. why stray from a great job for a few hundred bucks. CADWELD. On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: > Just look at $11.00 per ground rod connection for Cad-Weld as compared > to $1.98 for a mechanical clamp. Which do you think a ham will > choose ? > ered to [hidden email] -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ______________________________________________________________ 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 Don Wilhelm
To my mind, false economy.
Sent from my iPad > On Jun 5, 2020, at 3:36 PM, Don Wilhelm <[hidden email]> wrote: > > > That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! > All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. > In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. > Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. > > 73, > Don W3FPR > >> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: >> Just look at $11.00 per ground rod connection for Cad-Weld as compared to $1.98 for a mechanical clamp. Which do you think a ham will choose ? > ______________________________________________________________ > 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: Self-fusing liquid electrical tape
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Don, Are those all 8 ft ground rods driven vertical in ground without help from a rock drill? Lots of rock in your area? Mike AC5P
On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj <[hidden email]> wrote: To my mind, false economy. Sent from my iPad > On Jun 5, 2020, at 3:36 PM, Don Wilhelm <[hidden email]> wrote: > > > That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! > All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. > In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. > Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. > > 73, > Don W3FPR > >> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: >> Just look at $11.00 per ground rod connection for Cad-Weld as compared to $1.98 for a mechanical clamp. Which do you think a ham will choose ? > ______________________________________________________________ > 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: Self-fusing liquid electrical tape
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In reply to this post by Phil Kane-2
It sure is! This was my first one, so I didn't really know what to
expect. I was a bit more casual with the rest, I admit: https://youtu.be/j3MwokpxSco On Fri, Jun 5, 2020 at 10:48 AM Walter Underwood <[hidden email]> wrote: > > Cad-weld seems a easier than the other approach described. It is more robust against corrosion, plus it is fun. 73, Byron N6NUL -- - Northern California Contest Club - CU in the Cal QSO Party 3-4 Oct 2020 - www.cqp.org ______________________________________________________________ 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: Self-fusing liquid electrical tape
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In reply to this post by Art Greenberg
All my ground rods are below ground level. I didn't want to take a chance of failure so used 23 one-shots with #4 solid copper wire. Maybe that is one of the reasons why I get away with never unhooking coax even when I watch lightning strike the tower. One point ground for everything, lightning arrestors on every coax and control line to the house, bonding the shield of all coax to the base of the tower probably helps too.
73, N2TK, Tony -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Art Greenberg Sent: Friday, June 5, 2020 1:41 PM To: [hidden email] Subject: Re: [Elecraft] Self-fusing liquid electrical tape Yeah, maybe I'm one of the exceptions. I just used 20 of them to build a lightning ground system for a new tower install. Easy to use and considerable peace of mind knowing the joints created will last a long time underground. -- Art Greenberg WA2LLN [hidden email] On Fri, Jun 5, 2020, at 13:32, Phil Kane wrote: > On 6/5/2020 9:05 AM, Grant Youngman wrote: > > > Cad-weld isn’t expensive — $11-15 per weld depending on where you > > buy the stuff. Typically sold in kits of 6 one-shot crucibles, and > > available for varying ground wire sizes on 1/2” or 5/8” ground rods. > > Agreed, but how many of us would go through that exercise? > > 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] ______________________________________________________________ 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: Self-fusing liquid electrical tape
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In reply to this post by Mike Maloney
Mike,
They are all 8 foot rods and were driven vertically with a fence post driver and then finished off with a sledge. I was 20 years younger at that time, I could not do it today. 3 or 4 rods in a day was all the shoulders could manage. Yes, we hit some small rocks, but they will split is hammered on enough. We did not encounter large rocks when digging the house foundation or the trenches for the ground source heat pump - so it is not too rocky where we are - fist sized at the largest. 73, Don W3FPR On 6/5/2020 4:20 PM, Mike Maloney wrote: > Don, Are those all 8 ft ground rods driven vertical in ground > without help from a rock drill? Lots of rock in your area? > Mike AC5P > > ______________________________________________________________ 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: Self-fusing liquid electrical tape
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In reply to this post by donovanf
Now that was cool. Actually very hot 😊
N2TK, Tony -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of [hidden email] Sent: Friday, June 5, 2020 2:14 PM To: [hidden email] Subject: Re: [Elecraft] Self-fusing liquid electrical tape Hey Jim, If you think Cad-Welding a ground rod is fun to watch, take a look at thermite welding of railroad tracks: www.youtube.com/watch?v=5uxsFglz2ig 73 Frank W3LPL ----- Original Message ----- From: "Jim Brown" <[hidden email]> To: [hidden email] Sent: Friday, June 5, 2020 6:07:22 PM Subject: Re: [Elecraft] Self-fusing liquid electrical tape On 6/5/2020 10:23 AM, Chris Waldrup wrote: > This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast. The primary purpose of grounding bonding has NOTHING to do with radio -- it's for LIGHTNNG PROTECTION! On 6/5/2020 10:46 AM, Walter Underwood wrote: > Cad-weld seems a easier than the other approach described. It is more robust against corrosion, plus it is fun. Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to watch. :) 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: Self-fusing liquid electrical tape
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In reply to this post by Phil Kane-2
Or expense? Lessee... 20 (ground rods including 5 at the tower) times
$4 per clamp, vs $11-15 for little discernible gains.. adding over $300 in my grounding solution. Not a huge amount, but those costs add up quickly. I went with clamps, all buried below grade. I opted to tie the shop (barn) panel rod to the tower and the house panel rod and have a single run out into a field for future (RX antenna) use (and simply more earth contact to dissipate). The copper wire was the cheapest element in play. Rick NK7I On 6/5/2020 10:32 AM, Phil Kane wrote: > On 6/5/2020 9:05 AM, Grant Youngman wrote: > >> Cad-weld isn’t expensive — $11-15 per weld depending on where you buy >> the stuff. Typically sold in kits of 6 one-shot crucibles, and >> available for varying ground wire sizes on 1/2” or 5/8” ground rods. > Agreed, but how many of us would go through that exercise? > > 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] |
Re: Self-fusing liquid electrical tape
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In reply to this post by Bob McGraw - K4TAX
On 6/5/2020 12:01 PM, Bob McGraw K4TAX wrote:
> I agree with Jim, K9YC on this. Grounding is for lightning > protection. To be effective, it should be outside of the > structure/house and be very low resistance. And all driven grounds > must be bonded back to the AC Mains ground. This is per NEC. Your > equipment, your house, and your life may depend on it being done correctly. Another thing that we do is to bond all of the ground rods in an outside ring which is buried in a trench filled with conductive concrete. A layer of the concrete, than the ground ring, and then another layer of that concrete. Expensive? You betcha, but cheap insurance for sites costing well over a million dollars just for the infrastructure. 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] |
Re: Self-fusing liquid electrical tape
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In reply to this post by Mike Maloney
I have 12 ground rods in the ring ground system around my house with the
radios in one room inside. the ground rods are all tied to each other and the power ground. I agree the Cad welds can get expensive, that is why I high temperature silver soldered the wire and ground rods together. Not normal soft solder but the high strength, high temperature silver solder used in HVAC systems. This requires a acetylene torch to do the soldering with. this accomplishes the same thing that a CAD weld provides but with less cost if you have gas welding equipment available. What ever you do make sure the system will maintain very good connections over time or you are just giveng yourself a false sense of security that can be very costly both in money and safety over time. Roger K7RXV On 6/5/2020 4:20 PM, Mike Maloney wrote: > Don, Are those all 8 ft ground rods driven vertical in ground without help from a rock drill? Lots of rock in your area? Mike AC5P > On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj <[hidden email]> wrote: > > To my mind, false economy. > > Sent from my iPad > >> On Jun 5, 2020, at 3:36 PM, Don Wilhelm <[hidden email]> wrote: >> >> >> That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! >> All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. >> In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. >> Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. >> >> 73, >> Don W3FPR >> >>> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: >>> Just look at $11.00 per ground rod connection for Cad-Weld as compared to $1.98 for a mechanical clamp. Which do you think a ham will choose ? >> ______________________________________________________________ >> 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] |
Re: Self-fusing liquid electrical tape
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In reply to this post by Don Wilhelm
A way for us no longer young people to drive ground rods is with a SDS
construction hammer and a ground rod driving bit. that is what electricians use. I have a layer of shale about 2 feet deep where I live and it takes less that 10 minutes per 8 foot ground rod driven below the surface with this method. You can get the equipment to do this at most tool rental places if you don't have your own. The driver bit for the tool is less very inexpensive at stores such as Lowes. Roger K7RXV On 6/5/2020 4:50 PM, Don Wilhelm wrote: > Mike, > > They are all 8 foot rods and were driven vertically with a fence post > driver and then finished off with a sledge. > I was 20 years younger at that time, I could not do it today. 3 or 4 > rods in a day was all the shoulders could manage. > Yes, we hit some small rocks, but they will split is hammered on enough. > We did not encounter large rocks when digging the house foundation or > the trenches for the ground source heat pump - so it is not too rocky > where we are - fist sized at the largest. > > 73, > Don W3FPR > > On 6/5/2020 4:20 PM, Mike Maloney wrote: >> Don, Are those all 8 ft ground rods driven vertical in ground >> without help from a rock drill? Lots of rock in your area? >> Mike AC5P >> >> > > ______________________________________________________________ > 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 Jim Brown-10
Huh? I don't sell them...
73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/5/20 10:53 AM, Jim Brown wrote: > On 6/5/2020 8:17 AM, Phil Kane wrote: >> For our commercial and public safety >> communication site grounding systems our firm insists on cad-weld at all >> exposed and buried connection points but I would suspect that very few >> hams, let alone residential or even commercial electricians, would go to >> that length. > > It was years before I went from mechanical clamps to cadwelds. No > question that it's the way to go. Some are packaged much better than > others. I prefer the ones where the two powders are packaged separately. > NK7Z sells them. > > 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 Ed Tanton
Anyone know what those green wires are on each RR cross tie?
73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 6/5/20 12:28 PM, Edward T. Tanton wrote: > WOW!!! That was so-o-o neat!!! > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of > [hidden email] > Sent: Friday, June 05, 2020 2:14 PM > To: [hidden email] > Subject: Re: [Elecraft] Self-fusing liquid electrical tape > > Hey Jim, > > > If you think Cad-Welding a ground rod is fun to watch, take a look at > thermite welding of railroad tracks: > > > www.youtube.com/watch?v=5uxsFglz2ig > > > 73 > Frank > W3LPL > > ----- Original Message ----- > > From: "Jim Brown" <[hidden email]> > To: [hidden email] > Sent: Friday, June 5, 2020 6:07:22 PM > Subject: Re: [Elecraft] Self-fusing liquid electrical tape > > On 6/5/2020 10:23 AM, Chris Waldrup wrote: >> This is probably overkill for QRP but I wanted to do it right like we used > to do in broadcast. > > The primary purpose of grounding bonding has NOTHING to do with radio -- > it's for LIGHTNNG PROTECTION! > > > On 6/5/2020 10:46 AM, Walter Underwood wrote: >> Cad-weld seems a easier than the other approach described. It is more > robust against corrosion, plus it is fun. > > Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to > watch. :) > > 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] > 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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I'm colorblind. If you're talking about the doobers at the end of each
tie over the foot of the rail, they're hold downs for the rails on concrete ties. They take the place of spikes in wood ties whose purpose is to maintain proper separation ["gauge"] between the rails. The rails stand up by themselves. On 6/5/2020 4:14 PM, Dave Cole wrote: > Anyone know what those green wires are on each RR cross tie? > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist > ARRL Asst. Director, NW Division, Technical Resources > > On 6/5/20 12:28 PM, Edward T. Tanton wrote: >> WOW!!! That was so-o-o neat!!! >> >> -----Original Message----- >> From: [hidden email] >> [mailto:[hidden email]] On Behalf Of >> [hidden email] >> Sent: Friday, June 05, 2020 2:14 PM >> To: [hidden email] >> Subject: Re: [Elecraft] Self-fusing liquid electrical tape >> >> Hey Jim, >> >> >> If you think Cad-Welding a ground rod is fun to watch, take a look at >> thermite welding of railroad tracks: >> >> >> www.youtube.com/watch?v=5uxsFglz2ig >> >> >> 73 >> Frank >> W3LPL >> >> ----- Original Message ----- >> >> From: "Jim Brown" <[hidden email]> >> To: [hidden email] >> Sent: Friday, June 5, 2020 6:07:22 PM >> Subject: Re: [Elecraft] Self-fusing liquid electrical tape >> >> On 6/5/2020 10:23 AM, Chris Waldrup wrote: >>> This is probably overkill for QRP but I wanted to do it right like >>> we used >> to do in broadcast. >> >> The primary purpose of grounding bonding has NOTHING to do with radio -- >> it's for LIGHTNNG PROTECTION! >> >> >> On 6/5/2020 10:46 AM, Walter Underwood wrote: >>> Cad-weld seems a easier than the other approach described. It is more >> robust against corrosion, plus it is fun. >> >> Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to >> watch. :) >> >> 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] >> > ______________________________________________________________ > 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: Self-fusing liquid electrical tape
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In reply to this post by NK7Z
Brain cramp -- I meant KF7P.
73, Jim K9YC On 6/5/2020 4:06 PM, Dave Cole wrote: > Huh? I don't sell them... > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist > ARRL Asst. Director, NW Division, Technical Resources > > On 6/5/20 10:53 AM, Jim Brown wrote: >> On 6/5/2020 8:17 AM, Phil Kane wrote: >>> For our commercial and public safety >>> communication site grounding systems our firm insists on cad-weld at all >>> exposed and buried connection points but I would suspect that very few >>> hams, let alone residential or even commercial electricians, would go to >>> that length. >> >> It was years before I went from mechanical clamps to cadwelds. No >> question that it's the way to go. Some are packaged much better than >> others. I prefer the ones where the two powders are packaged >> separately. NK7Z sells them. >> ______________________________________________________________ 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: Self-fusing liquid electrical tape
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In reply to this post by Roger Steyaert, K7RXV
I spent a summer during my college years silver-soldering 120 radials to
ground screens for each of the 4-tower array of WSAZ. 73, Jim K9YC On 6/5/2020 2:41 PM, Roger Steyaert wrote: > that is why I high temperature silver soldered the wire and ground rods > together. Not normal soft solder but the high strength, high temperature > silver solder used in HVAC systems. This requires a acetylene torch to > do the soldering with. this accomplishes the same thing that a CAD weld > provides but with less cost if you have gas welding equipment available. ______________________________________________________________ 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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try a 10 tower array. :-)
Sent from my iPad > On Jun 5, 2020, at 10:33 PM, Jim Brown <[hidden email]> wrote: > > I spent a summer during my college years silver-soldering 120 radials to ground screens for each of the 4-tower array of WSAZ. > > 73, Jim K9YC > >> On 6/5/2020 2:41 PM, Roger Steyaert wrote: >> that is why I high temperature silver soldered the wire and ground rods together. Not normal soft solder but the high strength, high temperature silver solder used in HVAC systems. This requires a acetylene torch to do the soldering with. this accomplishes the same thing that a CAD weld provides but with less cost if you have gas welding equipment available. > > ______________________________________________________________ > 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: Self-fusing liquid electrical tape
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In reply to this post by Roger Steyaert, K7RXV
I use maps gas with silvafloss.
Have a great day! Bill ________________________________ From: [hidden email] <[hidden email]> on behalf of Roger Steyaert <[hidden email]> Sent: Friday, June 5, 2020 4:41:16 PM To: [hidden email] <[hidden email]> Subject: Re: [Elecraft] Self-fusing liquid electrical tape I have 12 ground rods in the ring ground system around my house with the radios in one room inside. the ground rods are all tied to each other and the power ground. I agree the Cad welds can get expensive, that is why I high temperature silver soldered the wire and ground rods together. Not normal soft solder but the high strength, high temperature silver solder used in HVAC systems. This requires a acetylene torch to do the soldering with. this accomplishes the same thing that a CAD weld provides but with less cost if you have gas welding equipment available. What ever you do make sure the system will maintain very good connections over time or you are just giveng yourself a false sense of security that can be very costly both in money and safety over time. Roger K7RXV On 6/5/2020 4:20 PM, Mike Maloney wrote: > Don, Are those all 8 ft ground rods driven vertical in ground without help from a rock drill? Lots of rock in your area? Mike AC5P > On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj <[hidden email]> wrote: > > To my mind, false economy. > > Sent from my iPad > >> On Jun 5, 2020, at 3:36 PM, Don Wilhelm <[hidden email]> wrote: >> >> >> That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! >> All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. >> In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. >> Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. >> >> 73, >> Don W3FPR >> >>> On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: >>> Just look at $11.00 per ground rod connection for Cad-Weld as compared to $1.98 for a mechanical clamp. Which do you think a ham will choose ? >> ______________________________________________________________ >> 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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