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1. [Amps] Henry 4 K-2 SWR (score: 1): Author: "Bud Governale" <w3ll@arrl.net>; Date: Wed, 7 Dec 2005 20:46:33 -0500; When passing thru the Henry 4 K-2 amp, with the amp turned off, the exciter sees an SWR of between 1.1 to 2.0 depending on the band the exciter is set on (75M thru 10M). The SWR is higher at the high; /archives//html/Amps/2005-12/msg00084.html (7,317 bytes)
2. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Wed, 07 Dec 2005 22:05:35 -0500; Hello Bud: It is possible that there may be some contamination on the contacts of the T/R relay, and you might try cleaning them if they are open frame. If they are vacuum relays, there isn't much yo; /archives//html/Amps/2005-12/msg00085.html (10,177 bytes)
3. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 7 Dec 2005 23:32:26 -0600; You can perform a test to see what might be causing the problem, Bud. First, short cross the contacts of RY-1 by wrapping a small gauge solid copper bus wire between the 2 normally open contacts. Che; /archives//html/Amps/2005-12/msg00089.html (7,705 bytes)
4. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 8 Dec 2005 03:58:46 -0800; At its characteristic Z, coax has zero reactnace, so my guess is that Henry Radio did not compensate for the XL in the output relay by adding a parallel C of c. 30pF. Richard L. Measures, AG6K, 805.3; /archives//html/Amps/2005-12/msg00090.html (11,638 bytes)
5. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: TexasRF@aol.com; Date: Thu, 8 Dec 2005 10:42:51 EST; The swr bridge certainly could be part of the problem. Another often overlooked cause of this problem is where the input and output coax shield/center conductor is split apart to make connections to; /archives//html/Amps/2005-12/msg00092.html (9,320 bytes)
6. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: K8MLM@aol.com; Date: Thu, 8 Dec 2005 11:48:23 EST; Bud, It may be just the extra coax you are putting in the line between the exciter and amplifier. As you said, the SWR goes up as the frequency goes up. At low frequencies, the amplifier and coax rep; /archives//html/Amps/2005-12/msg00094.html (9,034 bytes)

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