Dow Key relay chatter problems

[George Maier]

I have three Dow-Key 110VAC coaxial relays. Two are the older black body DKC
type and one is a newer silver body DK60 type.  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 connector.  The newer
relay works flawlessly, as do all the two 110VAC Advance relays that I have.
Short of pitching the Dow-Keys in the dumpster, does anyone know of cure for
this behavior? 

Thanks & 73,
George - W1LSB

 

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