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1. [Amps] SWR increase on SB-220 input (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Tue, 01 May 2012 09:38:19 -0400; I've been operating a lot of 18 MHz recently with my SB-220 set on 15 meters, and I now notice that the input SWR on 15 is over 2:1, resulting in some exciter foldback and reduced output power. I'm p; /archives//html/Amps/2012-05/msg00001.html (6,982 bytes)
2. Re: [Amps] SWR increase on SB-220 input (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 01 May 2012 09:57:53 -0400; You could also have cooked the slug in the coil or warped the coil form depending on the material. There is a fair amount of circulating current in those pi-networks when run off frequency. 73, ...; /archives//html/Amps/2012-05/msg00002.html (7,356 bytes)
3. [Amps] SWR increase on SB-220 input (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Tue, 01 May 2012 13:38:29 -0400; Thanks to all for your suggestions. In retrospect, I think I should have put more emphasis on the "why" aspect - is it dangerous to input circuit components to run an amplifier like an SB-220 on band; /archives//html/Amps/2012-05/msg00016.html (7,224 bytes)

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