[Johnson] Hal Guertzky Ranger PTT mod

n6kyr at netzero.net n6kyr at netzero.net
Fri Jul 23 11:58:53 EDT 2004


Did anyone happen to catch that PTT modification put forth by Hal Guertzky on this July issue of ER?

Brilliant article, I might add. Uses current drawn through the center tap (now opened up to accomodate the relay coil) of the power transformer in order to energize the relay. Shorting out the relay via the mic switch keys the NC position of the realy to key the rest of the transmitter. 

My "beef" with this mod (and maybe I'm just being a bit too sensitive) is the fact that if that relay coil opens up (which is a possibility) is that you have a few hundred volts exposed at the center tap to ground. Anyone have any comments about this? Let me know and thanks. Cal. 

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