The K2/100 already includes a high voltage output keying line for linear
amplifiers on its KPA100 back panel. It can handle up to 200V and 1A
max. Most amps with -positive- keying voltages can be T/R keyed from the
K2/100.
I think the SB-220 uses a positive voltage so it should work.
The few amps with negative keying voltages will need a relay or solid
state buffer between the amp and the rig.
See page 59 of the KPA100 manual for the key out line specification, and
page 53 for the 8R Hold menu option that provides a keyout hold feature
to prevent amplifier relay chatter on CW.
73, Eric WA6HHQ
Elecraft
Todd Gahagan wrote:
I would really be interested in this also Tom. Been going to drive my
SB220 with the KPA-100, K-2 combo for some time.
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