On Sun,8/30/2015 7:32 AM, Larry wrote:
Measures (K6???) did a relay speed-up scheme for QSK on an SB220, I
don't remember the details but it was something like hitting the relay
with higher than usual coil voltage/current and it shortened up the
relay pull-in time.
My neighbor, Bob Wolbert, K6XX, has worked for Elecraft for several
years. Many years ago, he published a circuit like what you're
describing. He credits it to Tony, K1KP.
http://www.k6xx.com/radio/fastrely.pdf
http://www.k6xx.com/ikanrite.html#fastrely
73, Jim K9YC
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