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1. [AMPS] re: Radio Relay (score: 1): Author: k3lr@telerama.lm.com (k3lr); Date: Thu, 20 Mar 1997 13:40:45 -0500; I have had the amp relays fail in both the IC765 and IC781 when driving various amplifiers. The fix I used is simple and effective. I put a 47 ohm resister in series and a diode (IN4004), .001 1KV di; /archives//html/Amps/1997-03/msg00196.html (7,517 bytes)
2. [AMPS] re: Radio Relay (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Thu, 20 Mar 1997 15:17:41 -0800 (PST); Please repost with some sort of diagram -- as I understand it, the 47k goes direct between the Icom RLY OUT and the amp RLY in where exactly is the cap put where exactly is the diode (I assume it is; /archives//html/Amps/1997-03/msg00199.html (8,833 bytes)
3. [AMPS] re: Radio Relay (score: 1): Author: robrk@fyi.net (Bob Morris); Date: Thu, 20 Mar 1997 23:45:08 -0500; The diode/capacitor combo goes on the amplifier side of the resistor. Diode's cathode to the resistor. Tim's notes-- and it's a 47.00 ohm not 47k.... K2RK -- FAQ on WWW: http://www.contesting.com/amp; /archives//html/Amps/1997-03/msg00202.html (8,054 bytes)
4. [AMPS] re: Radio Relay (score: 1): Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI)); Date: Fri, 21 Mar 1997 11:34:28 -0500; What does the diode do? I assume it connects between ground and the relay line of the amplifier? 73 Tom -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administr; /archives//html/Amps/1997-03/msg00206.html (7,482 bytes)
5. [AMPS] re: Radio Relay (score: 1): Author: robrk@fyi.net (Bob Morris K2RK); Date: Fri, 21 Mar 1997 16:57:21 -0500; I was just passing Tim's (K3LR) notes to the guy who read 47k not 47.0 ohms. I assume the diode is the standard spike protection, provide outboard. ps... The 3-500 AC wiring...in the ARRL Handbook. I; /archives//html/Amps/1997-03/msg00207.html (8,931 bytes)
6. [AMPS] re: Radio Relay (score: 1): Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI)); Date: Fri, 21 Mar 1997 21:36:08 -0500; That's what I was curious about. It is impossible to add eternal spike protection with a diode, unless the diode is a zener or a biased diode clamp. The reason is this... The back pulse coming out of; /archives//html/Amps/1997-03/msg00210.html (9,705 bytes)
7. [AMPS] Re: Radio relay (score: 1): Author: ab4ru@stc.net (Ron Hooper); Date: Sat, 22 Mar 1997 18:07:53 +0000; Subject: Re: [AMPS] re: Radio Relay To: <amps@contesting.com> Date: Sat, 22 Mar 1997 17:46:22 +0000 From: Ron Hooper <ab4ru@stc.net> Organization: Is there life after Contesting? Diode protection: Ho; /archives//html/Amps/1997-03/msg00212.html (12,008 bytes)
8. [AMPS] re: Radio Relay (score: 1): Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI)); Date: Sat, 22 Mar 1997 19:40:16 -0500; Hi Ron, I wasn't following the idea behing an external conventional diode, I was curious how it was being used. Back EMF is highest at the moment the current flow is broken, when the magnetic field j; /archives//html/Amps/1997-03/msg00215.html (8,862 bytes)

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