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1. [AMPS] SB-220 Mod (score: 1): Author: W6TG@aol.com (W6TG@aol.com); Date: Thu, 27 Mar 1997 03:47:34 -0500 (EST); << Who sells that vaccummmm relay mod for the SB220?? -- 73 Robert W5AJ w5robert@blkbox.com WB5CRG, VK5CRG, WB5CRG/VP2M & VP2E & WN5CRG ! I don't know of anyone selling a kit, maybe someone on the re; /archives//html/Amps/1997-03/msg00261.html (7,500 bytes)
2. [AMPS] SB-220 Mod (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 27 Mar 97 02:52:56 -0800; There is a circuit in "The Nearly Perfect Amp[ifier" in the 1/94 issue of QST. The switching speed is about 1.9mS. Also see Figure 7B at: http://www.vcnet.com/measures You can buy the RJ-1A (RF outp; /archives//html/Amps/1997-03/msg00264.html (7,587 bytes)
3. [Amps] SB-220 mod (score: 1): Author: "kingwood" <k5jv@kingwoodcable.com>; Date: Sun, 23 Aug 2009 12:21:10 -0500; Greetings to all, I found this HeathKit Service Bulletin. If this is the bulletin Carl mentioned, it does apply to the filament transformer, but has absolutely nothing to do with what we were discuss; /archives//html/Amps/2009-08/msg00416.html (8,324 bytes)
4. Re: [Amps] SB-220 mod (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 23 Aug 2009 13:42:58 -0400; Thats the one and I wasnt sure of the exact failure issue. Thanks for posting it. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti; /archives//html/Amps/2009-08/msg00417.html (9,104 bytes)

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