[AMRadio] Voltage regulator


KB2WIG at twcny.rr.com KB2WIG at twcny.rr.com
Sun Mar 19 16:41:04 EST 2006


Generaly, the diodes are there to protect the relay contacts from 
arcing. So without looking at them , i'd suggest to leave them be.. klc

----- Original Message -----
From: Barrie Smith <barrie at centric.net>
Date: Sunday, March 19, 2006 4:20 pm
Subject: Re: [AMRadio] Voltage regulator
To: Discussion of AM Radio <amradio at mailman.qth.net>

> Another couple of questions relative to relays this time.
> 
> Some of my antenna relays have protective diodes and some don't.  
> If a power 
> supply were to be used only for switching relays, could the 
> protective diode 
> be placed at the output of the power supply, rather than at the relay?
> 
> Also, looking at a couple of Amphenol coax relays I have here, 
> there is not 
> only a protective diode, but a (very) small disc ceramic capacitor 
> across 
> the coil.
> 
> Further protection?
> 
> 73, Barrie, W7ALW 
> 
> 
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