The Collins T-47 / ART-13 is a 100 watt carrier output, AM-CW-MCW transmitter that was generally used in USN and USAAF/USAF aircraft. Frequency range is from 2 to 18 MHz, but a special plug-in Low Frequency Oscillator (LFO) allowed operation between 200 and 600 or 1500 kHz, in CW only.
The T-47/ART-13 featured an advanced Autotune system that would automatically tune up to 11 preset channels (10 channels plus one LF channel) selectable by a front panel switch. The Autotune system would tune the transmitter frequency and output network to mechanical presets that then would match a properly selected antenna. The Autotune cycle took about 25 seconds to complete.
Power requirements were supplied by a dynamotor that ran on the aircraft +28vdc battery/charger system. The aircraft battery buss supplied the +28vdc@10Amps necessary for the transmitter's tube filaments and relay operation while the dynamotor provided a dual output of +400vdc and +750vdc.
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