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1. [Amps] LP filter effects (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Sat, 16 Nov 2002 10:25:33 -0500; Steve, my experience with the Drake LPF's is that after sustained use at 1.5 KW, they start to fail. Probably capacitor dielectrics are breaking down or something similar. They are really only rated; /archives//html/Amps/2002-11/msg00273.html (9,146 bytes)
2. [Amps] Russian and Air Variables (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Mon, 25 Nov 2002 13:59:51 -0500; Does anyone have any information regarding the purchase of wholesale quantities of air variables suitable for full legal limit antenna tuners from Russia these days? China? Other countries? How is th; /archives//html/Amps/2002-11/msg00369.html (8,360 bytes)
3. [Amps] transformer oil (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Thu, 26 Sep 2002 11:25:37 -0400; Not a good idea. It'll become rancid and decompose and will not have the thermal properties of mineral or other more appropriate oils. 73, Joe; /archives//html/Amps/2002-09/msg00248.html (7,197 bytes)
4. [Amps] Molex Connectors Needed (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Sun, 19 May 2002 12:52:50 -0400; Terry, I have bought the pins in small quantity packages at electronic supply stores. I suspect Mouser, etc. carry them also. 73, Joe; /archives//html/Amps/2002-05/msg00304.html (7,375 bytes)
5. [AMPS] Power out indicator (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 12 Feb 2002 19:56:31 -0500; Barrie, an easy way out is to use an RF ammeter in one of the legs of open wire line and simply tune for maximum RF current. If you're running a KW, you'll probably need a 0-10 A meter. 73, Joe -- FA; /archives//html/Amps/2002-02/msg00122.html (9,082 bytes)
6. [Amps] Re-subscribe ?? (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Mon, 25 Feb 2002 18:36:27 -0500; Yes! 73, Joe; /archives//html/Amps/2002-02/msg00278.html (7,364 bytes)
7. [AMPS] roller inductors (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 01 Jan 2002 11:12:04 -0500; Dear Carl: My Viking Thunderbolt gave 38 years of solid service with Roller inductor in final tank. The main thing is to keep it clean and snug to prevent arcing. Once arcing starts, it should be dea; /archives//html/Amps/2002-01/msg00003.html (7,670 bytes)
8. [AMPS] Thunderbolt questions (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 06 Nov 2001 09:01:29 -0500; Bill, I bought my Tbolt used in 1963 and used it for 38 years until I sold it about two weeks ago. It's obviously a quite reliable amp. It will put out about 900 watts at saturation when run in Class; /archives//html/Amps/2001-11/msg00073.html (9,770 bytes)
9. [AMPS] Thunderbolt questions (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 06 Nov 2001 12:52:41 -0500; I agree with Steve on all counts. The fan bearings will go without periodic lubrication. Replacement fans can often be found at hamfests though. 73, Joe -- FAQ on WWW: http://www.contesting.com/FAQ/a; /archives//html/Amps/2001-11/msg00093.html (11,121 bytes)
10. [AMPS] technical web site to look at... (score: 1): Author: k2xx@swva.net (Joe Giacobello); Date: Fri, 08 Jun 2001 10:05:19 -0400; Thanks for the link. I agree. The topics are discussed in detail and well illustrated. They discuss theory as well as practical trouble-shooting. There are questions at the end of each section to all; /archives//html/Amps/2001-06/msg00072.html (8,236 bytes)
11. [AMPS] Tentec Titan 425 Opinions Wanted (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Mon, 18 Jun 2001 10:04:19 -0400; I have an opportunity to purchase a Tentec Titan 425 amp. The reviews on eHam seem quite favorable, although they do warn that the finals are expensive and are very sensitive to excessive grid curren; /archives//html/Amps/2001-06/msg00136.html (6,950 bytes)
12. [AMPS] ALPHA 86: Comments Please! (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Wed, 17 Jan 2001 10:28:39 -0500; I have an opportunity to buy a used Alpha 86. For now, it would be used with an FT-1000MP. Anyone out there have any comments on the performance, reliability and durability of this amp? Current fair; /archives//html/Amps/2001-01/msg00417.html (6,963 bytes)
13. [AMPS] linear amps (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 30 Jan 2001 11:50:21 -0500; Collins also recommended that a specific length of feedline should be used between the exciter and the 30S1 input. I have ignored this warning with no ill effects. The 30S1 uses a 4CX1000A in the fin; /archives//html/Amps/2001-01/msg00718.html (9,305 bytes)
14. Re: [Amps] Johnson Desk KW (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sat, 01 Nov 2003 12:00:44 -0500; Bill, I believe that this is the same arrangement used in the Viking Thunderbolt. I don't have mine anymore, but it always worked well. I think the Desk KW is just the Tbolt mounted in a desk. The gu; /archives//html/Amps/2003-11/msg00009.html (8,315 bytes)
15. [Amps] AM-6154 Info Wanted. Experiences, etc? (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sat, 08 Nov 2003 11:11:01 -0500; I have an opportunity to buy an AM-6154 which is touted to put out 500W on 2 mtrs with 10W drive. Anyone here ever used one? From references on the web, they seem to be conversions of discarded FAA u; /archives//html/Amps/2003-11/msg00109.html (7,154 bytes)
16. [Amps] 3CX800A vs 3CX800A7? (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sat, 22 Nov 2003 20:12:55 -0500; I'm interested in knowing if there was a predecessor to the 3CX800A7. Was it called a 3CX800A? Was it physically identical to the A7? Did it have 11 pins like the A7 or 7 pins? I'd appreciate any inp; /archives//html/Amps/2003-11/msg00318.html (6,896 bytes)
17. [Amps] Info on Mirage 6M 10/150 Amp? (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sun, 15 Feb 2004 21:34:01 -0500; I recently had a Mirage 10W in, 150W out 6M brick amp in the shack. When I checked it out, it wasn't working. It seemed that the RF from the exciter was feeding straight through to the output. I assu; /archives//html/Amps/2004-02/msg00129.html (7,283 bytes)
18. Re: [BULK] - [Amps] Info on Mirage 6M 10/150 Amp? (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Tue, 17 Feb 2004 10:30:59 -0500; Rick, I would be operating exclusively CW and SSB. 73, Joe R.Measures wrote: ** What mode are you using on 6m? Joe, In many Mirage 6m amps, including a model A1015 that I have at home, the circuitry; /archives//html/Amps/2004-02/msg00150.html (11,592 bytes)
19. [Amps] Need MJE-170 (MJE-172?) Transistor for old 2 Mtr Amp (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sun, 22 Feb 2004 16:18:49 -0500; I have an old VHF Engineering 2M amp that looks like it has a shorted MJE-170. Minimum order amount makes purchase from usual suppliers prohibitive. Anyone out there have one that they'd sell me? I b; /archives//html/Amps/2004-02/msg00208.html (7,150 bytes)
20. Re: [Amps] Johnson Thunderbolt questions (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Sat, 13 Mar 2004 10:24:58 -0500; Clay, I no longer have my Tbolt but I never used that resistive position to drive it. It sounds like that's what you're doing. I simply selected the input for the band I wanted, tuned the grid in CW; /archives//html/Amps/2004-03/msg00139.html (11,434 bytes)

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