[AMRadio] Contactor


Donald Sanders w4bws at comcast.net
Sun Sep 16 11:20:07 EDT 2007


Geoff, what did you use? a .01at 1600 volts across the contacts> 

Healthfully yours,
                          Don W4BWS

> Geoff/W5OMR wrote:
> 
> Er... that is to say, when the relay is 'relaxed', and no current 
> flowing through it's coil, the contacts are closing a circuit.  It 
> doesn't matter if it's AC or DC, you gotta get the resulting arc 
> off of those relay contacts, otherwise, bye-bye relay.
> I found this out the hard way, when I didn't put some sort of 
> capacitor across the relay contacts of a PTT modification on 
> one of my Viking II's.  Didn't take long for 600v @ 180mA 
> to eat those contacts alive!
> 
> -- 
> Driving your AM Rig without a scope, 
> is like driving your car at night, without headlights. (K4KYV)
> 
> --
> 73 = Best Regards,
> -Geoff/W5OMR
> 
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