[Elecraft] Use of K3 Antenna Tuner to match amplifier input

[Guy Olinger K2AV]

Your amplifier should be close enough to a 50 ohm drive impedance that the
bypass mode in the K3 is easily usable when driving the amp. If you need an
ATU to drive the amp, it is a problem of some sort with the amp tube, its
input circuitry or connecting circuitry.  I have seen a bad 3 foot piece of
coax between a transceiver and amp make the amp appear undrivable.

What is the indicated SWR on the K3 display when driving the amp? If it's
not 1.5 or less, got work to do on the amp.

73, Guy.