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References: [ +from:Donald.Kessler@wpafb.af.mil: 15 ]

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1. [AMPS] test (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Wed, 7 Jun 2000 15:22:40 -0400
test - disregard pls. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com
/archives//html/Amps/2000-06/msg00059.html (6,512 bytes)

2. [AMPS] Dumb directly heated cathode amp operational questions (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Wed, 7 Jun 2000 15:27:21 -0400
Ok, I'll offer a comment... I own two TL-922s. I think that the RF deck cooling is excellent, and is fairly quiet. Following Rich's suggested mods, the amps operate very quietly and the only noise I
/archives//html/Amps/2000-06/msg00060.html (12,292 bytes)

3. [AMPS] 3-500Z Pulls? (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Tue, 13 Jun 2000 14:47:48 -0400
Some time ago, I was told of a potential source of good Eimac 3-500Zs that were "medical pulls", and tested for full output. However, I don't recall any other information... Does anyone know who this
/archives//html/Amps/2000-06/msg00155.html (6,801 bytes)

4. [AMPS] FAILURE OF PARASITIC RESISTORS IN AL-811X AMPLIFIER (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Wed, 1 Mar 2000 09:30:36 -0500
Phil, I have had the great misfortune to receive (free) two mfj "3kw" antenna tuners. Pure junk! - mediocre design and very poor implementation. I had an mfj antenna switch - also junk - it is now c
/archives//html/Amps/2000-03/msg00007.html (10,491 bytes)

5. [AMPS] FAILURE OF PARASITIC RESISTORS IN AL-811X AMPLIFIER (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Thu, 2 Mar 2000 10:35:23 -0500
I don't remember the nomenclature, but the antenna switch was their qro 6-position switch with receptacles for pl-259 connectors. The fundamental problem was that the connectors themselves were of o
/archives//html/Amps/2000-03/msg00044.html (11,211 bytes)

6. [AMPS] Misc. Oscillations (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Mon, 6 Mar 2000 10:50:48 -0500
Tom, Actually the Eimac 3-500Z brochure states the filament voltage is 5.0V +/- 0.25V. By that definition, 4.75V should also provide full emission. However, operating the filament at less than 5.0V,
/archives//html/Amps/2000-03/msg00240.html (12,385 bytes)

7. [AMPS] Re: Poor Science (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Mon, 6 Mar 2000 16:10:56 -0500
Actually, I subscribe to this list specifically to read the banter between Rich and Tom.. I have learned a great deal from the both of them - some of it not always good, but I wouldn't have it any ot
/archives//html/Amps/2000-03/msg00296.html (12,000 bytes)

8. [AMPS] rollers (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Wed, 8 Mar 2000 10:29:03 -0500
Phil, I went up to Piqua, Ohio yesterday and dropped in on Palstar. Great products! and great hospitality! I'm surprised that I never heard of them until now... Apparently most all of their business
/archives//html/Amps/2000-03/msg00469.html (9,548 bytes)

9. [AMPS] No response? (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Wed, 8 Mar 2000 12:31:00 -0500
I posted this a few days ago in response to the notion that purchasers of commercially produced amps should have to modify their new purchases to include the sound engineering left out by the manufac
/archives//html/Amps/2000-03/msg00472.html (8,296 bytes)

10. [AMPS] Blow TL922 (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Thu, 24 Feb 2000 10:57:03 -0500
Helmut, et. al., I don't have the schematic in front of me right now and am working from memory... I would suspect that the bias zener diode is shorted. This 7.5 V zener bias diode is stud-mounted to
/archives//html/Amps/2000-02/msg00551.html (10,454 bytes)

11. [AMPS] S: TL922 Improvements (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtCol HQ AFMC/DOOT)
Date: Fri, 25 Feb 2000 09:08:29 -0500
Helmut, Try http://www.vcnet.com/measures/ When you get there, take a look at Figure 23. That bandswitch wafer came from one of my TL-922s before modifying the amp - very stable now after making the
/archives//html/Amps/2000-02/msg00574.html (8,593 bytes)

12. [AMPS] TL-922 Filament Transformer Protection (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtC AFMC/DOOT)
Date: Mon, 7 Jun 1999 11:22:49 -0400
Greetings all... I've been following this thread with much interest as I received two TL-922A amps from the MARS program. While these amps had very little time on them, one of the amps had significan
/archives//html/Amps/1999-06/msg00199.html (14,821 bytes)

13. [AMPS] TL-922 Filament Transformer Protection (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtC AFMC/DOOT)
Date: Mon, 7 Jun 1999 11:30:42 -0400
I hate spell checkers... It changed my call... 73 again de Don (ki6sz) Come on Rich, use your head. The low pass system on the input of the amp virtually guaranties the rise time of any pulse is abou
/archives//html/Amps/1999-06/msg00200.html (13,014 bytes)

14. [AMPS] Vacuum relay help (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtC AFMC/DOOT)
Date: Tue, 11 May 1999 08:55:26 -0400
Does anyone know of a source for replacement coils for Kilovac HC-1 vacuum relays? I have one with a damaged relay coil. The coil slips out quite easily following removal of a single retaining screw.
/archives//html/Amps/1999-05/msg00135.html (7,131 bytes)

15. [AMPS] Full break-in... (score: 1)
Author: Donald.Kessler@wpafb.af.mil (Kessler Donald J LtC AFMC/DOOT)
Date: Fri, 16 Apr 1999 16:30:43 -0400
I too have built Rich Measures circuit for both of my TL-922s. However, because I had two identical amps to modify, I designed two sets of pc boards to fit into each amp. The larger of the two boards
/archives//html/Amps/1999-04/msg00314.html (8,302 bytes)

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