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1. Re: [Amps] Chimney Material (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Thu, 26 Feb 2004 13:05:58 -0500; Chuck's right as the chimney for my 4CX1600B amp. is made from the auto gasket material. The amp. has been in use since 1996 on RTTY. At 07:24 AM 2/26/04, hahn wrote: Ok guys I found a cheap place to; /archives//html/Amps/2004-02/msg00266.html (8,390 bytes)
2. Re: [Amps] Solid State Amps (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 07 Dec 2004 13:06:37 -0500; Hello, Please post on the reflector as others also are interested in the same topic. I'm going to have to build an amp. (another for the SO2R position). A solid state amp would be very efficient by n; /archives//html/Amps/2004-12/msg00124.html (8,336 bytes)
3. Re: [Amps] High C out (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Fri, 21 Jan 2005 18:48:01 -0500; Hello, I seem to remember an article in Ham Radio from the 80's regarding an amp. using three 813s built by Bob, W4MB, where he did the calculation for the inductance that went from the plates to the; /archives//html/Amps/2005-01/msg00437.html (11,095 bytes)
4. [Amps] Inductance Variations (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 08 Feb 2005 00:00:53 -0500; Hello, Couple of questions regarding inductance - measurement and use. Identifying the tap positions on an inductance w/ an Autek RF-1 for use in a Pi-L tank circuit and noticed a marked difference w; /archives//html/Amps/2005-02/msg00289.html (7,580 bytes)
5. [Amps] Pi-L In-circuit Adjustment Question (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Sat, 19 Feb 2005 11:20:39 -0500; Hello, Should the SWR reading be considered when the impedance reads 50 Ohms looking into the output of a Pi-L circuit? The question came about when trying to checkout a Pi-L circuit installed in a h; /archives//html/Amps/2005-02/msg00593.html (7,829 bytes)
6. Re: [Amps] Tetrodes (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Mon, 11 Jul 2005 13:44:07 -0400; Hello, I agree with Mark as Ian's Tetrode Boards have saved my tube (4CX1600B) many times due to operator error. 73, Mike, K4GMH _______________________________________________ Amps mailing list Amps; /archives//html/Amps/2005-07/msg00089.html (8,870 bytes)
7. Re: [Amps] Metric Conversion (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Wed, 10 Aug 2005 19:16:04 -0400; Thanks Mark for the heads-up on the converter. Unfortunately, it only works on XP or later OS. 73, Mike, K4GMH _______________________________________________ Amps mailing list Amps@contesting.com ht; /archives//html/Amps/2005-08/msg00394.html (8,828 bytes)
8. Re: [Amps] Metric Conversion (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Thu, 11 Aug 2005 09:25:44 -0400; Hello Bill, Thanks, works great. Also, an interesting web site. 73, Mike, K4GMH _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm; /archives//html/Amps/2005-08/msg00409.html (11,956 bytes)
9. [Amps] Is This 4CX1600B Still Good? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 22 Nov 2005 15:34:46 -0500; Hello, Need guidance on whether the tube, 4CX1600B, is still good after an amp. failure during the ARRL Sweepstakes SSB Contest. When the amp. went out there weren't any flashes or smoke just no outp; /archives//html/Amps/2005-11/msg00444.html (8,000 bytes)
10. Re: [Amps] Is This 4CX1600B Still Good? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 22 Nov 2005 16:23:36 -0500; Hello, Thanks for the heads-up. 73, Mike, K4GMH _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-11/msg00446.html (9,974 bytes)
11. Re: [Amps] Is This 4CX1600B Still Good? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Wed, 23 Nov 2005 09:36:51 -0500; Hello Mark, Filament in tube measures ~2.5 Ohms and the correct voltage is on the filament "pins" in the socket. Haven't measured the filament voltage at the tube for a while. It was done when settin; /archives//html/Amps/2005-11/msg00455.html (9,479 bytes)
12. Re: [Amps] Is This 4CX1600B Still Good? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Wed, 23 Nov 2005 15:39:32 -0500; Hello George, Safely checked and the tube is warm after three minute warm up. Earlier had measured the resistance of the tube to be ~2.3 Ohms. 73, Mike, K4GMH ________________________________________; /archives//html/Amps/2005-11/msg00471.html (8,640 bytes)
13. [Amps] 4CX800 & GS35B (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Mon, 28 Nov 2005 06:11:18 -0500; Will the 4CX800 take 3100 V DC continuous? The specifications for the 4CX800 has a 2000 V continuous (anode) limit. Some schematics for 4CX800 amps. show more than 2000 V on the anode. The Alpha 99 r; /archives//html/Amps/2005-11/msg00502.html (6,967 bytes)
14. [Amps] Diode RCA #99250-162 (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Thu, 01 Dec 2005 15:58:41 -0500; Hello, I have nine RCA 99250-162 Diode packages and can't find any information on them using the usual sources - Google, etc. The molded package is 3 1/4" long by 5/8" thick by 1" high. They measure; /archives//html/Amps/2005-12/msg00003.html (6,328 bytes)
15. [Amps] GS-35B Grid Current? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Sat, 31 Dec 2005 14:38:17 -0500; Hello, What should be the nominal grid current for a GG GS-35B with ~3000 V on the anode and 1500 Watts output (~0.8 A on anode)? What is the maximum grid current for a GG GS-35B? 73, Mike, K4GMH ___; /archives//html/Amps/2005-12/msg00405.html (6,184 bytes)
16. [Amps] Russian Capacitor (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Sat, 31 Dec 2005 23:58:55 -0500; Hello, What is the value of a capacitor with the following markings (I believe it is a Russian make): KB?-10xb2200n? note: the "?" are for Cyrillic characters? Is the value 2200 pF at 10 KV? Plan is; /archives//html/Amps/2005-12/msg00416.html (6,441 bytes)
17. [Amps] GS-35B Vertical Mounting & Input Impedance (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Wed, 11 Jan 2006 17:29:32 -0500; Hello, Is it okay to use the GS-35B in an upside down, vertical position? Want to make final adjustments to the input pi network while the tube is operating. Unfortunately, the tube's grid compartmen; /archives//html/Amps/2006-01/msg00346.html (7,408 bytes)
18. Re: [Amps] GS-35B Vertical Mounting & Input Impedance (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Thu, 12 Jan 2006 15:31:56 -0500; Hello Tony, Thanks for the info., especially about the amount of air needed at sea level. The only reference regarding the amount of air needed was for the 88 CFM and never saw any air density refere; /archives//html/Amps/2006-01/msg00360.html (10,751 bytes)
19. [Amps] Input Network? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 17 Jan 2006 23:16:09 -0500; Hello, An attempt was made to hook-up single 10 meter a pi-network input to a GS-35B. Unfortunately, it didn't work although seemed to check out okay on the bench and when it was installed in the amp; /archives//html/Amps/2006-01/msg00440.html (8,702 bytes)
20. Re: [Amps] What blower? (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Tue, 31 Jan 2006 17:01:54 -0500; Does the GS-35B require 88 cfm at sea level? Seems several weeks ago someone mentioned the 88 cfm was for operation of the tube at other than sea level (what that level is wasn't stated). The sea lev; /archives//html/Amps/2006-01/msg00776.html (11,176 bytes)

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