The SPE amp will respond to the K3 Band Data output exactly as the Yaesu
Band Data Output. The only issue is that the K3 uses open drain outputs. I
don't believe that the SPE amp has pull-up resistors on the Band Data
inputs, so you may need to put 4.7K pull up resistors to 5V on the K3 band
data outputs. But you can put a voltmeter on one of the SPE band data
inputs and see if it reads 5VDC. If it does, then you are all set.
Remember that the SPE amp puts out full power with about 20 watts of drive,
so adjust your K3 drive power accordingly (no ALC interface for the K3 yet).
Phil - AD5X
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