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1. [AMPS] RF Surge Problem (score: 1): Author: jreid@aloha.net (Jim Reid); Date: Tue, 26 Oct 1999 09:34:35 -1000; Hi experienced ones, Not sure if the AMP reflector is the place for my questions, but don't know where else I could find someone who might have the experience to answer, hi. I had a call from the Ser; /archives//html/Amps/1999-10/msg00644.html (11,987 bytes)
2. [AMPS] RF Surge Problem (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 26 Oct 99 15:57:49 -0500; Well, if the Alpha-Delta has 40 dB of isolation then: 100 Watts = 50 dBm This means that 10 dBm still gets to the Yaesu front end. 10 dBm is 10 mW. Enough to blow it up? I doubt it but who knows. Act; /archives//html/Amps/1999-10/msg00645.html (9,775 bytes)
3. [AMPS] RF Surge Problem (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 26 Oct 99 16:05:18 -0500; I forgot to also mention if the Alpha Delta has just 30 dB of isolation then you are putting 100 mW into your front end. That could be enough to blow something. I don't like the idea of a sensitive f; /archives//html/Amps/1999-10/msg00646.html (8,808 bytes)
4. [AMPS] RF Surge Problem (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 26 Oct 1999 16:54:39 -0500; If you want all the fine stuff listed above, you should tune the amp up using the plate voltage and current that you used to design the tank circuit with. Why go to all the trouble to carefully figur; /archives//html/Amps/1999-10/msg00649.html (10,791 bytes)
5. [AMPS] RF Surge Problem (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 26 Oct 99 17:06:29 -0500; Why effectively lower your modulation level in order to set your power? That's not so good. That's why some folks have such poor audio. They back their audio off to control their power. IMHO, the PA; /archives//html/Amps/1999-10/msg00651.html (8,579 bytes)
6. [AMPS] RF Surge Problem (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 26 Oct 1999 17:06:04 -0500; Why not order some extra supressors from Yaesu to have on hand? Then you can put them in yourself, and save big bucks. There are a lot of repairs in modern rigs that are still doable in the field. E; /archives//html/Amps/1999-10/msg00652.html (8,052 bytes)
7. [AMPS] RF Surge Problem (score: 1): Author: dbowker@mail.sjv.net (Dave Bowker); Date: Tue, 26 Oct 1999 18:48:12 -0400; Jim, Likely causes of failure of one of these devices, if not by lightning, is high SWR on the xmtr line to the linear or antenna tuner or very high precipitation static buildup on an antenna such as; /archives//html/Amps/1999-10/msg00653.html (8,595 bytes)
8. [AMPS] RF Surge Problem (score: 1): Author: af006@lafn.org (Harv Shore); Date: Tue, 26 Oct 1999 15:55:08 -0700; Jim It is probably a good idea to throw away the coax switch. The best isolation to unselected ports that you can expect would be on the order of 30 or 40 dB A bit of math and you see that you are ja; /archives//html/Amps/1999-10/msg00654.html (14,406 bytes)
9. [AMPS] RF Surge Problem (score: 1): Author: jreid@aloha.net (Jim Reid); Date: Tue, 26 Oct 1999 13:35:59 -1000; Hi Harv, You wrote, in part: The switch is out of here!! So it will take a couple extra moments to change rigs, if I want to check which is the best for a particular situation; not a matter to avoid; /archives//html/Amps/1999-10/msg00655.html (8,729 bytes)
10. [AMPS] RF Surge Problem (score: 1): Author: K4SO@aol.com (K4SO@aol.com); Date: Wed, 27 Oct 1999 12:52:26 EDT; I have replaced two of these in 2 different radios. In both cases, the small reed relay to T/R switch was fried and the surge supressor exploded! In one case, the rig "listened" to a transmitter (imp; /archives//html/Amps/1999-10/msg00663.html (8,390 bytes)

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