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1. [Amps] Resonant filters + new email (score: 1)
Author: "John Lyles" <>
Date: Tue, 15 May 2007 17:45:25 -0600
I have established a new account here, moved over from my work email. For now on, this is it. In response to two questions, the Galaxy 300 values must be wrong. Also, the value of choke in resonance
/archives//html/Amps/2007-05/msg00137.html (7,800 bytes)

2. [Amps] Richardson source for tubes (score: 1)
Author: "John Lyles" <>
Date: Fri, 6 Jul 2007 10:16:34 -0600
Interestingly, Richardson just signed on as a distributor for Thales tubes (former Thomson) of France. The good news is, they are just a distributor for Thales, CPI/Eimac and others now. You do have
/archives//html/Amps/2007-07/msg00050.html (6,963 bytes)

3. [Amps] 8122 and parasitic excuses TSPA (score: 1)
Author: "John Lyles" <>
Date: Thu, 16 Aug 2007 10:54:02 -0600
2 subjects in this email: Burle Industries in Lancaster, PA is still very much in business. I talk with them almost monthly as we are a major customer for their super power tetrodes and triodes. I ha
/archives//html/Amps/2007-08/msg00103.html (11,042 bytes)

4. [Amps] parasitic excuses (score: 1)
Author: "John Lyles" <>
Date: Fri, 17 Aug 2007 09:30:15 -0600
Hi Colin The point there was that even I cannot resist the urge to blame a parasitic. Actually it was my co-engineer who suggested it, and I was a doubter, but had to prove it otherwise. However, I d
/archives//html/Amps/2007-08/msg00104.html (7,609 bytes)

5. [Amps] Use of temperature paints and crayons on tubes (score: 1)
Author: "John Lyles" <>
Date: Wed, 29 Aug 2007 22:47:10 -0600
Bob - Tempilaq, or Omegalaq when it is bought from Omega, can be used to measure your 4-1000A seal temperatures if applied carefully. I have not used it with glass tube envelopes, only ceramic/metal.
/archives//html/Amps/2007-08/msg00254.html (8,689 bytes)

6. [Amps] Old GE docs on Radiotrons (score: 1)
Author: "John Lyles" <>
Date: Thu, 30 Aug 2007 15:55:19 -0600
I was looking through some old GE REVIEW periodicals and found a set of well written articles explaining the theory of vacuum tubes as they knew them in 1927. Turns out they knew it pretty well, incl
/archives//html/Amps/2007-08/msg00267.html (6,984 bytes)

7. [Amps] Old Radiotron theory paper (score: 1)
Author: "John Lyles" <>
Date: Fri, 31 Aug 2007 19:45:41 -0600
Pete and everyone else who has responded. Sorry about the high Q junk filter at my ISP. I got enthusiatic interest in copies of this two part paper, so I will email them out to several who have offer
/archives//html/Amps/2007-08/msg00275.html (7,858 bytes)

8. [Amps] Posting here (score: 1)
Author: "John Lyles" <>
Date: Wed, 26 Sep 2007 20:57:20 -0600
Amps Digest, Vol 57, Issue 55, contained three posts, two of were replies containing reposts of issue #52. The subjects lines on all three were: Besides consuming a lot of bandwidth on my poor modem
/archives//html/Amps/2007-09/msg00354.html (6,987 bytes)

9. [Amps] big IRON (score: 1)
Author: "John Lyles" <>
Date: Mon, 1 Oct 2007 20:55:04 -0600
A decent big iron plate transformer, made by Electro Engineering for a Gates FM rig. Even single phase: Epay #200157131414 _______________________________________________ Amps mailing list Amps@conte
/archives//html/Amps/2007-10/msg00016.html (6,219 bytes)

10. [Amps] Vacuum coax T/R relay (score: 1)
Author: "John Lyles" <>
Date: Thu, 4 Oct 2007 13:00:01 -0600
Pat My old Jennings catalogs show nothing like that. Two things that don't sound like Jennings, at least from the packaging you described. Jennings used either a circulator connector for their larger
/archives//html/Amps/2007-10/msg00040.html (8,572 bytes)

11. [Amps] Amateur Radio Vet Turns 100 (score: 1)
Author: "John Lyles" <>
Date: Wed, 17 Oct 2007 16:10:02 -0600 _______________________________________________ Amps mailing list
/archives//html/Amps/2007-10/msg00204.html (6,449 bytes)

12. [Amps] Misconceptions about hazmat in ham radio equip (score: 1)
Author: "John Lyles" <>
Date: Sat, 17 Nov 2007 15:46:23 -0700
PCB was/is a good insulating oil, in that it was least flammable. The replacement oils now are more flammable. In capacitors, and transformers. I have seen numberous GE 4 uF 45 kV capacitors rupture
/archives//html/Amps/2007-11/msg00237.html (9,165 bytes)

13. [Amps] BeO in tubes (score: 1)
Author: "John Lyles" <>
Date: Sun, 18 Nov 2007 10:54:12 -0700
Exactly, BeO is similar to asbestos in that it causes lung tissue damage (berylliosis - pardon for spelling) that can eventually develop into cancer. Although not in all cases. I know a guy (a ham) w
/archives//html/Amps/2007-11/msg00248.html (9,119 bytes)

14. [Amps] wanted SB10 SSB adapter (score: 1)
Author: "John Lyles" <>
Date: Sun, 25 Nov 2007 19:20:17 -0700
Does anyone have a Heathkit SB10 sideband adapter (nonworking fine) that they'd be willing to part out? I need the meter from it. 73 John K5PRO _______________________________________________ Amps ma
/archives//html/Amps/2007-11/msg00368.html (6,431 bytes)

15. [Amps] SB-220 unbuilt (score: 1)
Author: "John Lyles" <>
Date: Mon, 26 Nov 2007 12:11:33 -0700
If you've always wanted to build your own kW amplifier, but don't have the gumption or parts to do it from scratch, there is a new-old-stock Heathkit SB220, never built, on epay. The're asking $1500,
/archives//html/Amps/2007-11/msg00379.html (7,018 bytes)

16. [Amps] PWD transformers (score: 1)
Author: "John Lyles" <>
Date: Sat, 8 Dec 2007 21:55:57 -0700
I just got a N.O.S. Weston meter from Peter Dahl Company's stock, as they carry not only iron but rectifiers, capacitors, meters, etc. Sorry to see Peter got afflicted with Parkinsons, wishing him pr
/archives//html/Amps/2007-12/msg00097.html (7,004 bytes)

17. [Amps] Pink ceramic (score: 1)
Author: "John Lyles" <>
Date: Wed, 12 Dec 2007 12:25:51 -0700
Burle Industries (former RCA-Lancaster, PA operation) quit using Frenchtown pink ceramic by the end of the 1980s in most cases. They were beautiful tubes, esp when they had the gold flash on the anod
/archives//html/Amps/2007-12/msg00146.html (6,783 bytes)

18. [Amps] diode advice (score: 1)
Author: "John Lyles" <>
Date: Thu, 3 Jan 2008 14:50:23 -0700
Thanks, Larry, well written advice. Happy new year to everyone here. John K5PRO ......... _______________________________________________ Amps mailing list http://lists.contesting
/archives//html/Amps/2008-01/msg00044.html (7,139 bytes)

19. [Amps] Amperex triode (score: 1)
Author: "John Lyles" <>
Date: Thu, 31 Jan 2008 11:16:25 -0700
Larry Have to tried emailing Covimag and asking them this question about mu? It appears (?) that they are no longer owned by Richardson, but still supply tubes to them. Covimag is one of the few manu
/archives//html/Amps/2008-01/msg00273.html (11,223 bytes)

20. [Amps] Warrior power amplifier (score: 1)
Author: "John Lyles" <>
Date: Sun, 24 Feb 2008 18:08:05 -0700
In addition to Carl, KM1H's, suggestions: You shouldn't need step start with this, unless the power transformer became much stiffer, heavier. The choke will resist a major current surge. Also, if you
/archives//html/Amps/2008-02/msg00178.html (9,841 bytes)

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