The photo above shows the
modules that make up the block diagram. The 144MHz IF feeds(via
the BNC socket in the lower right corner of the photo) the IC202
interface module, which grounds the PTT feedthrough on the DB6NT
transverter when the IC202S is put in the Transmit mode.
The Relay power supply
is for the microwave coaxial changeover relay shown in blue near
the sma output connector. The PA power supply module provides all
the voltages required by the 15W PA and is switched on for TX only
by the Sequencer, which is, in turn, switched on by the "+12V
on TX" output from the DB6NT transverter module.