Amateur Push Pull Number 45 Tube Transmitter

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01:36:10

This is one of first low power transmitters for amateur band.  This is "pair of 45's in push- pull" oscillator rig.

Left side has adjustable coil going to 50 K resistor. Left square wave source input is where telegraph key (open switch) is located.    500 pf capacitor is adjustable and tapped coil going to upper right transmitter antenna.  #45 tube filaments are 2.5 volts at 1.5 amp.  Maximum plate voltage is 275 volts.

published 10 years ago

darrhunt

10 years ago

The open sw when closed shorts out the 3v pulse v source.

lmccoig

10 years ago

Yes, square wave is to show telegraph key in simulator and not part of transmitter.

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