Dow Key relay chatter problems

Glen Zook gzook at YAHOO.COM
Sun Oct 1 17:26:07 EDT 2006

Try putting a silicon rectifier (i.e. 1N4004 through
1N4007) in series with the coil.  You might put about
a 10 mfd capacitor across the coil with the cathode
end of the diode going to the "+" (positive) side of
the diode.

Glen, K9STH

--- George Maier <George at MAIERGROUP.COM> wrote:

When actuated, the two black body relays seem to hum
and chatter regardless of how the tension is adjusted
between the internal contact and the transmit

Short of pitching the Dow-Keys in the dumpster, does
anyone know of cure for this behavior? 

Glen, K9STH


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