Early Electronic Television
RCA T1 1 KW Transmitter (1938)
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The modulator used 10 - 813 tubes in parallel to grid modulate the power amplifier. |
The RF unit employed a temperature controlled crystal oscillator. Push pull 889 tubes were used in the final amplifier. |

The high voltage rectifier compartment. 12 - 872A tubes in 3 phase configuration supplied transmitter voltages.


Broadcasting, November 1 1938

