** Bob -- Although it's more work on your part, one solution is to
convert the SB-201 from a negative to a positive relay supply V, remove
the original relay and cockamamie bias switching scheme, and do the
high-speed switching mod so it can keep up with modern radios -- i.e.,
not hotswitch. With Kenwood radios, use "RL" (+12v on Tx) on the
accessory jack to actuate the high-speed relays in the amplifier. ref:
Q3 in
http://www.somis.org/D.a.07.GIF
>I have just purchased the Heathkit SB-201amplifier which I would
>like to use with a Kenwood TS-570D. How would the ARB-704
>work between these two pieces of equipment? Might there be a
>better interface? N3HO Bob Gearing
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