I have an external RF transistor amplifier (AB1) using 2 MRF455
transistors in common emitter mode. I have a resistive T pad with an
approximate impedance of 50 ohms on the input side of the transistors.
The SWR on the input of the amp shows 1.3:1. When I use a 2 foot
jumper between the radio and the amp the amp puts out about 100 watts
max, but when I switch to a 9 foot jumper the amp puts out about 40
watts max. The receive stays the same no matter which jumper is used.
Why does changing the length of the jumper between the radio and the
amp make such a drastic change in how much the amp puts out?