Entering the TX room from the deck of the Ross Revenge
RCA Ampliphase BTA-50H AM 50.000 watt Transmitter
The Ampliphase modulation
Connecting the two (10 and 50 KW) transmitters to one antenna
The audio processing in a test setup
The on/off switch for the 50 KW transmitter
Gently glowing away
The modulation, as seen on the scope
The bottom of the mast inside the TX-room
The world-famous Optimod
Thanks to Alan Beech for explaining the following:
<This meter shows the voltage supply going to the
output amplifier of the transmitter. The voltage supply would normally always be about 14KV, in much the same way as a car radio always runs from 12 volts, but its output power is controlled by the volume control. You are correct though that when everything was working well Peter Chicago would run the transmitter at about 35kilowatts output, but I believe it normally ran at about 25KW. The transmitter does not actually have a meter showing the real output power, as it is much more important to measure the voltage and current of the various valves and other components. If all these voltages and currents are correct and the TX is set for full power, then the output will be 50 KW.
< Power output now at 14,5 kilovolts (KV)