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Total 92 documents matching your query.

1. [Amps] Intro (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Wed, 13 Jun 2012 14:45:18 -0700 (PDT)
Hello, I'm Jerry Kaidor, callsign KF6VB. Been a ham since high school - got my first license in 1970. Always been a fan of QRO. Built my first amp; four 6LQ6 tubes in an ARC-5 cabinet. Interests are
/archives//html/Amps/2012-06/msg00095.html (8,809 bytes)

2. Re: [Amps] Part 2 of "babying" radios and tubes, can do or not? (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 14 Jun 2012 06:26:13 -0700 (PDT)
\ ** In which case, you don't get much use out of it. And your electrolytics deform. - Jerry Kaidor _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2012-06/msg00106.html (8,024 bytes)

3. [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 14 Jun 2012 16:54:58 -0700 (PDT)
Hello, To mess with amps, a good dummy load is a must. I went to my storage, and pulled out a Cantenna of unknown provenance that I had purchased about 30 years ago at a flea market. Not knowing what
/archives//html/Amps/2012-06/msg00113.html (8,778 bytes)

4. Re: [Amps] opening up a transformer (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 08:57:21 -0700 (PDT)
** Once you get the wraparound sheetmetal cover off, the core will consist of "E" laminations and "I" laminations. Use a little knife or whatever to tease off the first lamination. The first few wil
/archives//html/Amps/2012-06/msg00141.html (8,914 bytes)

5. [Amps] Squirrely 30L-1 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 10:00:37 -0700 (PDT)
Hello, Today I tried my L1 up on 15 meters. It worked, but it was noticeably "squirrely". The "tune" function didn't work quite right ( set the meter to tune, set the exciter to 20W, tune for dip tou
/archives//html/Amps/2012-06/msg00142.html (8,987 bytes)

6. Re: [Amps] Squirrely 30L-1 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 10:44:46 -0700 (PDT)
** A matched set of Chinese 811A's, purchased from RF Parts many years ago. I also have qty 11 811A's, mostly American, gleaned out of the flea market over many years. I might try a set of those, ma
/archives//html/Amps/2012-06/msg00147.html (8,803 bytes)

7. Re: [Amps] Squirrely 30L-1 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 11:33:30 -0700 (PDT)
** That would be hard. I would have to unsolder the coils around them. And I'm not convinced that the squirrely-ness is an actual VHF parasitic. I do have a spectrum analyzer good to 450MHz - wouldn
/archives//html/Amps/2012-06/msg00150.html (9,632 bytes)

8. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 12:38:43 -0700 (PDT)
= ** How would I know? Does PCB oil have a specific smell? Viscosity? Color? Actually, I would REALLY like to know, because I'd like to buy some transformer oil. There's a guy on Ebay who sells it re
/archives//html/Amps/2012-06/msg00153.html (8,769 bytes)

9. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 15:34:41 -0700 (PDT)
It smelled kind of like paint thinner A.K.A. mineral spirits. It didn't burn. - Jerry _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com
/archives//html/Amps/2012-06/msg00162.html (10,491 bytes)

10. [Amps] Lines Voltage High (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 15:38:00 -0700 (PDT)
Hello, I've noticed that the 110V at the wall socket has crept up over the past several years. Nowadays it always seems to be 125V. I read somewhere that such high voltage is not good for the 30L-1,
/archives//html/Amps/2012-06/msg00164.html (7,760 bytes)

11. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 15:55:38 -0700 (PDT)
OK, I'm going to buy a gallon of transformer oil, and restore the Cantenna with a steel paint can. I will probably replace the top, and just drill the new one for the little box and the overpressure
/archives//html/Amps/2012-06/msg00165.html (9,377 bytes)

12. Re: [Amps] Lines Voltage High (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 17:20:45 -0700 (PDT)
** Now THAT makes sense. Yes, I thought about adding a bucking transformer. But given that the tube bias line is actually brought out to the PTT, it was simpler to just add a diode string to set the
/archives//html/Amps/2012-06/msg00168.html (8,211 bytes)

13. Re: [Amps] Lines Voltage High (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 17:43:13 -0700 (PDT)
** The plate voltage is 2000V no load, 1600 under load. And yes, I do worry about the filaments. - Jerry _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2012-06/msg00171.html (7,810 bytes)

14. [Amps] Alpha 78 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 20:30:17 -0700 (PDT)
Hi Guys, I've come upon a local Alpha 78 that is tempting me. Anybody have pros & cons about those? Questions I should ask the seller? It's got a "CW" position that should let it operate off 110V wit
/archives//html/Amps/2012-06/msg00179.html (7,270 bytes)

15. Re: [Amps] Lines Voltage High (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 20:58:41 -0700 (PDT)
** The PG&E guy said it was either 115k or 230k, he didn't know which. - Jerry _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm
/archives//html/Amps/2012-06/msg00185.html (8,211 bytes)

16. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 21:01:20 -0700 (PDT)
** I found an interesting web page somewhere about the Cantenna - it seems that the internal aluminum sleeve around the resistor had a capacitive effect. It gave it decent SWR clear up to 150MHz. -
/archives//html/Amps/2012-06/msg00186.html (9,653 bytes)

17. Re: [Amps] Alpha 78 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 21:16:10 -0700 (PDT)
** Another thing that tempts me is the Heathkit SB230. Another rare and valuable tube. I see them in working condition for about $400. Said to be an ideal platform for conversion to a dirt cheap GI-
/archives//html/Amps/2012-06/msg00188.html (7,224 bytes)

18. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 23:04:18 -0700 (PDT)
** I just ordered it on Ebay. I don't have the time to finagle around looking for it. It would be different if I actually knew somebody there. - Jerry _______________________________________________
/archives//html/Amps/2012-06/msg00193.html (8,725 bytes)

19. [Amps] Squirrely 30L-1 Redux (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 15 Jun 2012 23:19:23 -0700 (PDT)
Hello, Per advice received on this forum, I pulled the Chinese tubes out of my amp. One of them broke while I was gently wiggling it out - amazing. The plate cap pulled off, right along with a chunk
/archives//html/Amps/2012-06/msg00196.html (7,148 bytes)

20. Re: [Amps] tube fils..again (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sat, 16 Jun 2012 09:10:34 -0700 (PDT)
I was thinking about this last night. AC is hard to regulate. Has anybody thought of running filaments off DC? DC is easy to regulate. Cheap switching power supplies can deliver large amounts of effi
/archives//html/Amps/2012-06/msg00206.html (7,230 bytes)

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