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1. [AMPS] Noises in electrolytic capacitors (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 3 Oct 2001 09:21:39 EDT; --part1_a2.1a5a50ea.28ec6ae3_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit For whatever it's worth, the part in question is labeled HEI 8732, FST-20. I have or; /archives//html/Amps/2001-10/msg00032.html (10,814 bytes)
2. [AMPS] Noises in electrolytic capacitors (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sun, 30 Sep 2001 21:46:24 EDT; --part1_123.5255efc.28e924f0_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Tom gets the troubleshooting prize for this problem. After pulling the caps, I check; /archives//html/Amps/2001-09/msg00004.html (8,729 bytes)
3. [AMPS] Noises in electrolytic capacitors (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 26 Sep 2001 07:38:49 EDT; --part1_61.140b3e16.28e31849_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hello All, Back in June I posted a question about a failed electrolytic in my Henry; /archives//html/Amps/2001-09/msg00416.html (11,729 bytes)
4. [AMPS] Noises in electrolytic capacitors (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Fri, 28 Sep 2001 07:48:47 EDT; --part1_29.1b65b2ec.28e5bd9f_boundary Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable 73, Tom W8JI W8JI@contesting.com=20 Thanks for the tip on the equalizi; /archives//html/Amps/2001-09/msg00456.html (12,978 bytes)
5. [AMPS] Noises in electrolytic capacitors (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Fri, 28 Sep 2001 22:59:27 EDT; --part1_114.541c826.28e6930f_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I do think the Henry is poorly ventilated, just because of the cabinetry. I'm sure i; /archives//html/Amps/2001-09/msg00504.html (13,473 bytes)
6. [AMPS] SB-200 parasitic chokes (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Mon, 6 Aug 2001 09:14:25 EDT; --part1_fc.a1a22ff.289ff231_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Can anyone provide the value of the resistor used and the number of turns for the par; /archives//html/Amps/2001-08/msg00070.html (7,282 bytes)
7. [AMPS] Snap, Crackle and Pop (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 20 Jun 2001 07:36:01 EDT; --part1_119.87a6d9.2861e4a1_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit QROers, My Henry 2KD Classic has developed an arc in the power supply. I'm running th; /archives//html/Amps/2001-06/msg00179.html (8,533 bytes)
8. [AMPS] HL2200 (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 18 Apr 2001 19:09:41 EDT; Amp folks, A friend is investigating an HL2200. I know this is the last iteration of the venerable SB-220. Were there any significant differences, aside from the obvious aesthetic changes? Thanks for; /archives//html/Amps/2001-04/msg00427.html (6,617 bytes)
9. [AMPS] 6M amp circuits (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sat, 25 Dec 1999 15:04:47 EST; Can someone point me to a good circuit for a pair of 4CX250Rs on 6M? I have built one using a design in 1982 handbook for a single one but am looking for proven values for the tank circuit for a pair; /archives//html/Amps/1999-12/msg00378.html (7,100 bytes)
10. [AMPS] 432 400W amp wanted (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sun, 24 Oct 1999 17:48:31 EDT; A friend of mine is looking for a 400-500W amp for 432MHz. The AM-6155 and AM-6154 are surplus models that have been recommended. Any thoughts from the group on these? Anyone have a homebrew for sale; /archives//html/Amps/1999-10/msg00614.html (6,834 bytes)
11. [AMPS] RF Surge Problem (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 27 Oct 1999 12:52:26 EDT; I have replaced two of these in 2 different radios. In both cases, the small reed relay to T/R switch was fried and the surge supressor exploded! In one case, the rig "listened" to a transmitter (imp; /archives//html/Amps/1999-10/msg00663.html (8,390 bytes)
12. [AMPS] TPL brick-change class? (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sun, 15 Aug 1999 19:19:46 EDT; Does anyone have experience with changing the class of operation on a TPL 6M brick? These are FM, class C amplifiers for mobile use. The model I have is PA1-1AE that has a driver and final. 1-6W in f; /archives//html/Amps/1999-08/msg00268.html (6,723 bytes)
13. [AMPS] 6M amp (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sun, 15 Aug 1999 19:19:54 EDT; Along with my inquiry about the TPL brick, I'm entertaining using 1 or 2 4CX250Bs on 6M. Anyone out there have an RF deck with that tube complement and suitable tank components for sale. Maybe someon; /archives//html/Amps/1999-08/msg00269.html (6,881 bytes)
14. [AMPS] Display 4-1000 wanted (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sat, 24 Jul 1999 16:27:07 EDT; Having two homebrew 4-1000 amps, I have had a bad tube (good filament but no output) on display for a number of years. I finally knocked it off the table and broke the envelope and would like to repl; /archives//html/Amps/1999-07/msg00445.html (7,252 bytes)
15. [AMPS] Loading Capacitor (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Fri, 19 Mar 1999 09:13:42 EST; I am looking for a suitable capacitor for plate loading duty in a 4-1000A 5 band amplifier. The current cap was arced extensively by the previous owner (and then I added to it) on 10M, in particular; /archives//html/Amps/1999-03/msg00482.html (7,034 bytes)
16. [AMPS] Eimac FGQB3020 (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Sat, 9 Jan 1999 18:17:02 EST; A local VHFer has an amp with an Eimac FGQB3020 in it and is looking for details on this tube. Can anyone provide specs, perhaps a spec. sheet that could be scanned and e-mailed or copied and terra-m; /archives//html/Amps/1999-01/msg00126.html (6,710 bytes)
17. [AMPS] Tube identification (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Fri, 15 Jan 1999 21:29:58 EST; Thanks to those answering my initial inquiry. The numbers provided are apparently a date code, although not in the format I was familiar with on my 4-1000s and 8874s. Also, I have now explored that E; /archives//html/Amps/1999-01/msg00194.html (7,288 bytes)
18. [Amps] For Sale: tank circuit components (score: 1): Author: K4SO@aol.com; Date: Fri, 28 Nov 2003 14:53:21 EST; Builders, I've listed some parts on eBay for a medium power amp with 4-400s or tubes with similar impedance characteristics. Parts are in good shape, except for the sockets, that will require some cl; /archives//html/Amps/2003-11/msg00388.html (6,859 bytes)

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