This my LapTop and Radio interface. Three wire
control goes out to the T/R, Polarity and LNA tray
which is at antenna with the final RF amplifier and
switching PSU. I like the fool proof W1GHZ
sequencer kits, and only populated the part of the
board I need for T/R and PTT, Great kit for the
$19.99 cost and does anything you need from a
sequencer. I also use a DB9-KY thingy I got at
garage sale for USB control of PTT input to the
sequencer board. The seqencer gets it's power
from the three wire coming from the Amp up top
side. This provides isolation of the ground loop for
great audio quality during Tx, and eliminates
some RF lock up issues I had.
control goes out to the T/R, Polarity and LNA tray
which is at antenna with the final RF amplifier and
switching PSU. I like the fool proof W1GHZ
sequencer kits, and only populated the part of the
board I need for T/R and PTT, Great kit for the
$19.99 cost and does anything you need from a
sequencer. I also use a DB9-KY thingy I got at
garage sale for USB control of PTT input to the
sequencer board. The seqencer gets it's power
from the three wire coming from the Amp up top
side. This provides isolation of the ground loop for
great audio quality during Tx, and eliminates
some RF lock up issues I had.
