T/R Bias Relay Board Fully Assembled
$110.00
Description
Fully assembled by me.
Must be used either with L-4b Harbach board or a bias mod must be done to eliminate the 50k resistors in the power supply.
Rf out – output coax to output directional coupler
B- from bias mod string or L-4b Board
Ct – yellow wire green stripe center tap from filament transformer
V- blue wire switched side of relay coils from soft start or rca jack or L-4b Board
V+ 24 vdc from rectifier or L-4b board
Rf in coax from input so-239
Amp in coax going to input circuits
Rf out braided lead coming off of tank output network coax
Install video https://youtu.be/lrdkjTXIQLo?si=S0aQ1bR6yjRcRAh1
May require soft key interface
Install video only no paper instructions
