[AMRadio] Voltage regulator

[Donald Chester]

>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?
>
>

To me, the diode acts more as a protector of the switch or pilot relay 
contacts.  If the DC power supply has a filter capacitor at the output, the 
capacitor will look like a short to the inductive kick from the relay coil.  
If there is a regulator circuit, the spike could wipe out some of the solid 
state devices there.

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