35W Tube AM Transmitter Drawing The working frequency of the 35W tube AM transmitter is 3.5MHz. The high frequency crystal oscillator is composed of the tube 6AG7 and the quartz crystal X1. It is coupled to the power amplifier tube 6L6 through a 100P capacitor, and then tuned by the L1 and 235P capacitors and coupled to the antenna for transmission.
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