- 1. [Amps] FL-2100B input swr problem (score: 1)
- Author: Eric Dobrowansky <k2cb@comcast.net>
- Date: Fri, 30 Jun 2017 01:55:45 -0400
- I am working on an FL-2100B amplifier which is exhibiting high input SWR on all bands except 40m. I went ahead and replaced all of the capacitors on the tuned input circuit with new micas, including
- /archives//html/Amps/2017-06/msg00297.html (7,304 bytes)
- 2. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: "Ken Durand" <N4zed@comcast.net>
- Date: Fri, 30 Jun 2017 03:57:36 -0400
- My 2100 would not tune on 20...the problem WAS one of the caps, that is where I would have started as well. You probably already know this but look for something that is common to all the band's inpu
- /archives//html/Amps/2017-06/msg00298.html (8,667 bytes)
- 3. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: "Bruce Blain K1BG" <bruce.blain@charter.net>
- Date: Fri, 30 Jun 2017 06:59:48 -0400
- Inspect EVERYTHING between the output of your exciter and the first components in the amplifier closely. Test the coax to a dummy load. Look at the SO-239 connector on the amplifier chassis. Use an e
- /archives//html/Amps/2017-06/msg00299.html (9,545 bytes)
- 4. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: "Jim W7RY" <jimw7ry@gmail.com>
- Date: Fri, 30 Jun 2017 06:21:32 -0500
- Is the input and output band switch still synced? Is the bandswitch knob in sync with the front panel? 73 Jim W7RY Inspect EVERYTHING between the output of your exciter and the first components in th
- /archives//html/Amps/2017-06/msg00300.html (10,205 bytes)
- 5. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: K2CB <k2cb@comcast.net>
- Date: Fri, 30 Jun 2017 07:55:32 -0400
- Yes and yes to the band switch being in sync. SWR thru amp when in standby is fine. The only thought I came up with overnight is that possibly the coax from the relay to the band switch may be compro
- /archives//html/Amps/2017-06/msg00301.html (10,895 bytes)
- 6. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: K2CB <k2cb@comcast.net>
- Date: Fri, 30 Jun 2017 07:57:43 -0400
- When the amplifier is in standby, the SWR at the exciter in bypass mode is fine. So the only thing that leaves is the piece of coax between the relay and the input portion of the band switch. I plan
- /archives//html/Amps/2017-06/msg00302.html (10,751 bytes)
- 7. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: "Jim W7RY" <jimw7ry@gmail.com>
- Date: Fri, 30 Jun 2017 06:58:44 -0500
- Yes and yes to the band switch being in sync. "SWR thru amp when in standby is fine". This has nothing to do with the SWR though the amplifier only when the amplifier is operating. 73 Jim W7RY --Orig
- /archives//html/Amps/2017-06/msg00303.html (11,379 bytes)
- 8. [Amps] FL-2100B input swr problem (score: 1)
- Author: "Jim Thomson" <jim.thom@telus.net>
- Date: Fri, 30 Jun 2017 09:18:34 -0700
- <When the amplifier is in standby, the SWR at the exciter in bypass mode is fine. So the only thing that leaves is the piece of coax between the relay and the input portion of the band switch. I plan
- /archives//html/Amps/2017-06/msg00304.html (8,111 bytes)
- 9. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: K2CB <k2cb@comcast.net>
- Date: Fri, 30 Jun 2017 23:33:56 -0400
- Good news. I found the causes of the tuned input issues. One, I misinterpreted the indexing of the input band switch wafer for the tuned input coils. I had the switch's input and output sides reverse
- /archives//html/Amps/2017-06/msg00305.html (14,826 bytes)
- 10. Re: [Amps] FL-2100B input swr problem (score: 1)
- Author: Jim Brown <jim@audiosystemsgroup.com>
- Date: Tue, 4 Jul 2017 22:56:18 -0700
- Here's a fundamental point that use of the word "ground" as if it's a single point and ideal is totally wrong and causes confused, muddled thinking. EMC guru Henry Ott (Bell Labs, consultant to virtu
- /archives//html/Amps/2017-07/msg00005.html (10,382 bytes)
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