One more on the "stupid" thread
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Re: One more on the "stupid" thread
 
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I will just chime in and give 2 experiences. We had moved to a farm house and I was trying to get a rope over a certain branch. I used a small hammer tied to the end of the rope and was throwing it up in the air to get over the branch. The hammer was coming towards me as I tried to move on icy ground, and I put my hands over my head. They protected my head but hit hard one of my finger nails. I got a needle and sterilized it and worked in around to get a hole in my nail to relieve the pressure. I was not 9 years old but 33 years old!
I had a homebrew amp with 2-813 tubes. The cabinet was perforated aluminum. It looked like one of the 813s was glowing red so I had taken the top off and was talking on 20 meters I discovered the tube that was glowing red and decided just to set the top back on the amp. Instead one corner of the aluminum top dipped into the amp and touched the "cap" on one of the 813s. That was an exilerating experience. The perforated top went flying off to the left and my 104D mike went flying off to the right. I was thankful to be alive. I did not have a good feeling for about an hour. 2200volts at 500millamps! Incidently I still have the D104 mike and the last time I used it on a Ten Tec 544 Triton IV it worked very good. 36 years old. Well, here is one more. I was in northern Mich. in the winter and need to get on the roof of the house to make some adjustments on a antenna. The roof was full of snow and ice underneath so I climbed up a ladder and threw some salt on the pathway to the peak of the roof. I then got off the ladder and put my golf shoes on and climed up the roof. Very crazy thing to do. Paul Gates, KD3JF Elecraft Kits: K1 #0231 KX1 #1186 XG1: Signal Generator ----- Original Message ---- From: [hidden email] To: [hidden email] Sent: Tuesday, January 03, 2006 1:49:19 PM Subject: Re: [Elecraft] One more on the "stupid" thread Classic "Homers" of mine: - Climb tree, install halyard rope for antenna. Forget to tie rope ends together. Climb down tree, breeze shakes tree, short end of rope goes up and over branch..... Climb tree *again*.... - Two lovely NOS 837 tubes, ready to sell. Neat-and-clean but not-perfectly-level workbench. Concrete basement floor. One lovely NOS 837 tube, ready to sell. - "I'll back up those files tomorrow"....... 73 de Jim, N2EY _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Ron D'Eau Claire-2
"As we all (should) know, it ain't the voltage that does ya in, its the
current." I understand that the imposition of 60 Hz can cause the heart to fibrillate (flutter uncontrollably) and that's what does you in. Geoff, K6TFZ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: One more on the "stupid" thread
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In reply to this post by Albers-2
On Jan 3, 2006, at 9:45 AM, Albers wrote: > It was at that moment that I discovered that Mack trucks of that > vintage had positive ground!! Ever see a box end wrench instantly > get converted to an open end?? This reminds me of a slightly apocryphal story. At a telephone office, a fellow was servicing some equipment. Old telephone offices had a 48 volt backup battery supply to run the phone system. It used huge NiCad batteries and was distributed by large copper buss bars below the floor. Anyway, this fellow had part of the floor pulled up, and he dropped a wrench. It just happened to fall across the buss bars, shorting out the 48 volt supply. As it was described to me, the wrench melted instantly, and just kept on falling between the buss bars.... Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Stephanie Maks
I wrapped my fingers around the Elecraft BL1 balun to see if it
was getting warm while transmitting... duh... 100+ RF Watts. de Joe, aa4nn _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by K6TFZ
The volume knob has gotten very, very touchy lately. Very scratchy when
adjusting and suddenly blaring at top volume. Is it time for a new volume pot on my K2? 73, Bill Allen - wa5pb K2# 1068 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.11/219 - Release Date: 1/2/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Bill,
It certainly does sound like your present volume control is worn out. Replacement is likely easier than trying to 'monkey' with those 'restoration' fixes IMHO - I have never had much luck with the sprays, drops and other stuff that is supposed to repair controls. 73, Don W3FPR > -----Original Message----- > > The volume knob has gotten very, very touchy lately. Very scratchy when > adjusting and suddenly blaring at top volume. Is it time for a new volume > pot on my K2? > > 73, > Bill Allen - wa5pb > K2# 1068 > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: Time for a new Volume pot?
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Don could you give some guidance concerning the replacement. I have to do
the same thing on my K2. ----- Original Message ----- From: "Don Wilhelm" <[hidden email]> To: <[hidden email]>; <[hidden email]> Sent: Tuesday, January 03, 2006 10:05 PM Subject: RE: [Elecraft] Time for a new Volume pot? > Bill, > > It certainly does sound like your present volume control is worn out. > Replacement is likely easier than trying to 'monkey' with those > 'restoration' fixes IMHO - I have never had much luck with the sprays, > drops > and other stuff that is supposed to repair controls. > > 73, > Don W3FPR > >> -----Original Message----- >> >> The volume knob has gotten very, very touchy lately. Very scratchy when >> adjusting and suddenly blaring at top volume. Is it time for a new >> volume >> pot on my K2? >> >> 73, >> Bill Allen - wa5pb >> K2# 1068 >> > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: Time for a new Volume pot?
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In reply to this post by Bill Allen-6
>From the serial number you might consider making the audio gain pot mod
while you're in there if it hasn't been done yet. It makes a huge difference in how the audio pot operates, making adjustment less touch even with a new pot. On the Elecraft web site, go to Builder's Resources / Application Notes / K2 AF Pot Application Note for details. Ron AC7AC -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Bill Allen Sent: Tuesday, January 03, 2006 6:51 PM To: [hidden email] Subject: [Elecraft] Time for a new Volume pot? The volume knob has gotten very, very touchy lately. Very scratchy when adjusting and suddenly blaring at top volume. Is it time for a new volume pot on my K2? 73, Bill Allen - wa5pb K2# 1068 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.11/219 - Release Date: 1/2/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Brent Sutphin WB4X
Brent,
Since you asked, the pot replacement is actually rather easy - just take it one step at a time - first remove the front panel from the K2 (don't forget the screws from the control panel to the front panel on the inside); then remove all the knobs and the one screw next ot the VCO encoder to separate the front panel board from the metal panel. After that, remove the pot itself in whatever way you remove such soldering - if you do not have a powered desoldering tool, I suggest that the easiest way is to destroy the existing pot (no sense in preserving it, you were going to throw it away anyhow). With a set of heavy diagonal cutters, first cut off the 3 pins and then crush the pot body a bit so you can cut the two mounting ears off - after that, you can easily heat the stubs left in the board pull them out - clean up with solder wick and put the new pot on the board - re-assemble after doing the AF Gain pot wiring mod (if applicable). And as Ron pointed out - if your K2 serial number is less than 3000 (probably is if you are replacing the pot), make the changes for the AF Gain pot wiring mod - it will make a difference in the future for longevity of your new AF gain pot and makes the AF Gain control less 'touchy' and less noisy. 73, Don W3FPR > -----Original Message----- > > Don could you give some guidance concerning the replacement. I > have to do > the same thing on my K2. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Ron D'Eau Claire-2
hi Ron - ol' #525 has been getting pretty scratchy lately, and it has the AF Pot Mod. I guess they just get old and scratchy like the rest of us...;-) I found my misplaced XG1 the other day and went around measuring rigs. #1250 was singing along at MDS=-136dBm, but #525 wasn't close (haven't used it since Field Day, I'm afraid). After a bit of poking around, I found a marginal solder joint had finally gone bad in the T-R switch (RFC2). Some new solder and good as #1250! cheers! - jeff wk6i At 07:54 PM 1/3/2006, Ron D'Eau Claire wrote: >>From the serial number you might consider making the audio gain pot mod >while you're in there if it hasn't been done yet. It makes a huge difference >in how the audio pot operates, making adjustment less touch even with a new >pot. > >On the Elecraft web site, go to Builder's Resources / Application Notes / K2 >AF Pot Application Note for details. > >Ron AC7AC > >-----Original Message----- >From: [hidden email] >[mailto:[hidden email]] On Behalf Of Bill Allen >Sent: Tuesday, January 03, 2006 6:51 PM >To: [hidden email] >Subject: [Elecraft] Time for a new Volume pot? > > >The volume knob has gotten very, very touchy lately. Very scratchy when >adjusting and suddenly blaring at top volume. Is it time for a new volume >pot on my K2? > >73, >Bill Allen - wa5pb >K2# 1068 -- Jeff Stai [hidden email] Twisted Oak Winery http://www.twistedoak.com/ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: 20th century K2s (was RE: Time for a new Volume pot?)
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Jeff WK6I wrote:
hi Ron - ol' #525 has been getting pretty scratchy lately, and it has the AF Pot Mod. I guess they just get old and scratchy like the rest of us...;-) I found my misplaced XG1 the other day and went around measuring rigs. #1250 was singing along at MDS=-136dBm, but #525 wasn't close (haven't used it since Field Day, I'm afraid). After a bit of poking around, I found a marginal solder joint had finally gone bad in the T-R switch (RFC2). Some new solder and good as #1250! ------------------------------------------------------- Hi Jeff: Yes, the audio pots do get old. That's why I didn't suggest the mod as a "fix". Bill's K2 pretty obviously has a worn-out pot, but it's a good investment to do the mod while its apart to install a new pot. It can be downright scary how long an unsoldered joint or a poorly soldered joint will work just fine! They are "time bombs" waiting sometimes years before showing up as an intermittent for other weird behavior. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: the fine line between "stupid" and "curious"
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In reply to this post by Larry Makoski W2LJ
On 4 Jan 2006, at 00:52, Larry Makoski W2LJ wrote: > Nick Waterman wrote: > >>> That was my first introduction >>> to 120VAC in one arm and out the other. >>> >> >> Pah, you're all a bunch o' wimps! 240V in EU ;-) >> >> > Power usage being equal, this would mean less current. > yea but it's the volts that jolts -- and it's the mills that kills. -- Regards Andy, G8TQH http://www.rickham.net/ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Don Wilhelm-3
Here one for yu'all,
When I upgraded K2#402, I did do the AF gain pot mod. However, I notice that when I turn the volume down, at about the "1" position, which is a bit before full off position, the volume suddenly cuts out almost completely. So I can't lower the volume too much before it cuts out at about the 8 o'clock position. At times the volume is either too loud or too low and I can't get a middle value. I know I have to recheck my wiring for the mod, but thought that perhaps someone would know what I mis-wired. I have also noticed that when the receiver on rare occassins is overloaded with a nearby signal of blinding strength I can turn off the volume control completely and still hear some bleed through. Thanks, Steve, W2MY/5 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.11/219 - Release Date: 1/2/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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