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1. [Amps] REMOVING GRID SHORTS #2 (score: 1): Author: K8MLM@aol.com; Date: Sat, 12 Sep 2009 17:49:21 EDT; Has anyone had success with this process with the 8877 shorts related to the 1980s heat dam problem? Thanks, Bob K8MLM _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2009-09/msg00166.html (6,674 bytes)
2. Re: [Amps] Removing grid shorts (score: 1): Author: K8MLM@aol.com; Date: Sat, 12 Sep 2009 08:38:03 EDT; Ive salvaged several power tubes using 120VAC and a 200W light bulb in series as a current limiter. A bigger bulb would be better but I used what I have. Carl KM1H ___________________________________; /archives//html/Amps/2009-09/msg00164.html (7,093 bytes)
3. Re: [Amps] Grounded Grid(Screen) 4CX250B power gain (score: 1): Author: K8MLM@aol.com; Date: Sat, 11 Jul 2009 09:00:08 EDT; Hus, I ran three 4CX250Bs in GG, zero bias in a home brew AMP. That was before I knew it wasn't supposed to work, but it did. I was able to get about 800-900 watts out with 100 watts drive. Bob K8MLM; /archives//html/Amps/2009-07/msg00145.html (8,010 bytes)
4. [Amps] SOURCE FOR 9977 PULLS (score: 1): Author: K8MLM@aol.com; Date: Thu, 1 Jan 2009 14:38:17 EST; Does anyone know a good source for 8877 pulls?? Thanks, Bob K8MLM Woodbridge, VA **New year...new news. Be the first to know what is making headlines. (http://www.aol.com/?ncid=emlcntaolcom00000026); /archives//html/Amps/2009-01/msg00005.html (6,775 bytes)
5. [Amps] HENRA 4K-ULTRA HELP (score: 1): Author: K8MLM@aol.com; Date: Sun, 28 Dec 2008 17:29:12 EST; The other day I heard a poof in the Henry 4K-U and it tripped the mains circuit breaker. I opened it up and looked for something burned or smoke smell and found nothing. Then fired it up for test. Ot; /archives//html/Amps/2008-12/msg00356.html (7,752 bytes)
6. Re: [Amps] help with corona discharge (score: 1): Author: k8mlm@aol.com; Date: Wed, 12 Nov 2008 12:28:36 -0500; Concur.? 4CX250s also glow blue. Bob K8MLM Every Commander amp that I have added QSK and vacuum relays to has had the blue glow when looking through the cooling fins.. The three holer on my desk, wit; /archives//html/Amps/2008-11/msg00129.html (9,411 bytes)
7. Re: [Amps] crossmodulation in PA ? Thanks for all good??advice (score: 1): Author: K8MLM@aol.com; Date: Fri, 7 Sep 2007 21:07:51 EDT; Yup... they sure do with big flexible double 00 flexible bonding connections... the bonding cables are inside the wing structure where you don't see them. Composites are a problem in some of the new; /archives//html/Amps/2007-09/msg00098.html (9,859 bytes)
8. Re: [Amps] crossmodulation in PA ? Thanks for all good??advice (score: 1): Author: K8MLM@aol.com; Date: Fri, 7 Sep 2007 18:08:14 EDT; Not quite true. Look at MLI-B-5087B, Military Specification - Bonding, Electrical, and Lightning Protection for Aerospace Systems and the FAA Lightning Protection Handbook, DOT/FAA/CT89/22. My copies; /archives//html/Amps/2007-09/msg00090.html (10,665 bytes)
9. Re: [Amps] Testing amp with no air flow (score: 1): Author: K8MLM@aol.com; Date: Thu, 19 Oct 2006 19:51:30 EDT; There is an easier way. Attach the shop vacuum to the top of the tube and work on the bottom side. That's how I did some under side work on my Alpha 77. But in this case I hooked the shop vacuum to t; /archives//html/Amps/2006-10/msg00207.html (11,175 bytes)
10. Re: [Amps] Henry 3K-A Step Start Resitor Cone (score: 1): Author: K8MLM@aol.com; Date: Wed, 6 Sep 2006 07:31:58 EDT; Bob, It's actually an infrared heating element. Bob In a message dated 9/5/2006 9:43:14 P.M. Eastern Daylight Time, bmaser@tampabay.rr.com writes: Does anyone have a source for a step start resistor; /archives//html/Amps/2006-09/msg00114.html (6,972 bytes)
11. Re: [Amps] Anodizing aluminum, painting etc. (score: 1): Author: K8MLM@aol.com; Date: Wed, 16 Aug 2006 14:07:12 EDT; There are 3 modes of heat transfer; -radiation, -conduction and -convection ... where a moving fluid (air) carries the heat away. The convection mode of heat transfer comes into play for the heatsink; /archives//html/Amps/2006-08/msg00517.html (12,256 bytes)
12. Re: [Amps] more on the GS35b light TSPA (score: 1): Author: K8MLM@aol.com; Date: Sat, 25 Feb 2006 07:28:16 EST; I've seen the same kind if light emitted from a 4CX250, blue in this case. The blue glow turns on and off with modulation peeks or CW. Bob K8MLM _______________________________________________ Amps m; /archives//html/Amps/2006-02/msg00551.html (6,996 bytes)
13. [Amps] ALPHA-77 (score: 1): Author: K8MLM@aol.com; Date: Sun, 5 Feb 2006 10:28:52 EST; Has anyone made a replacement CB-2 Bias control board for the ALPHA-77 or a conversion to passive bias? Thanks, Bob K8MLM _______________________________________________ Amps mailing list Amps@contes; /archives//html/Amps/2006-02/msg00107.html (6,440 bytes)
14. Re: [Amps] Henry 4K Ultra - Military SErvice Manual ? (score: 1): Author: K8MLM@aol.com; Date: Tue, 27 Dec 2005 08:27:09 EST; I too would like the service manual if it exists. Bob K8MLM 4K Ultra owner _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/li; /archives//html/Amps/2005-12/msg00345.html (6,192 bytes)
15. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: K8MLM@aol.com; Date: Thu, 8 Dec 2005 11:48:23 EST; Bud, It may be just the extra coax you are putting in the line between the exciter and amplifier. As you said, the SWR goes up as the frequency goes up. At low frequencies, the amplifier and coax rep; /archives//html/Amps/2005-12/msg00094.html (9,034 bytes)
16. [Amps] ALPHA 374 (score: 1): Author: K8MLM@aol.com; Date: Sat, 30 Apr 2005 09:39:59 EDT; ETO Alpha 374 Bandpass Linear Amplifier. Serial number 3159. Rated at 2 kW PEP input Three new 8874s, date code 9525, less than 10 hours on the tube filaments. Gets full rated 1,300 Watts output. $13; /archives//html/Amps/2005-04/msg00632.html (6,677 bytes)
17. Re: [Amps] U.S. Military chooses Harris (score: 1): Author: K8MLM@aol.com; Date: Wed, 27 Apr 2005 20:37:41 EDT; It's part of the Joint Tactical Radio System (JTRS) acquisition. JTRS radios are software defined. Crypto is not hardware implemented, it's software implemented. It's the same kind of modern software; /archives//html/Amps/2005-04/msg00588.html (7,511 bytes)
18. Re: [Amps] 4CX350 in Dentron Clipperton V ????? (score: 1): Author: K8MLM@aol.com; Date: Sun, 10 Oct 2004 08:19:15 EDT; The 4CX350 also requires a different tube socket. Some quick questions for the reflector. I just purchased a Dentron Clipperton V 2meter amp (still waiting for its arrival). I have a new 4CX350 tube; /archives//html/Amps/2004-10/msg00128.html (7,334 bytes)
19. [Amps] ALPHA 374, Nye Viking Tuner (score: 1): Author: K8MLM at aol.com (K8MLM@aol.com); Date: Mon Jul 21 07:51:25 2003; ETO Alpha 374 Bandpass Linear Amplifier. Serial number 3159. Rated at 2 kW PEP input. Three new 8874s, date code 9525, less than 10 hours on the tube filaments. Gets full rated output. $1300.00. Pref; /archives//html/Amps/2003-07/msg00110.html (6,751 bytes)
20. [Amps] ALPHA 374 FOR SALE (score: 1): Author: K8MLM at aol.com (K8MLM@aol.com); Date: Sun May 11 09:14:23 2003; I will be bringing the following to Dayton: ETO Alpha 374 Bandpass Linear Amplifier. Serial number 3159. Rated at 2 KW PEP input. Three new 8874s, date code 9525, less than 10 hours on the tube filam; /archives//html/Amps/2003-05/msg00094.html (6,664 bytes)

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