Square Wave Generator

.25U 200V 6C5 T-20A27 ,5p 400V 6H6 6SJ7 4p 600V

.25U 200V 6C5 T-20A27 ,5p 400V 6H6 6SJ7 4p 600V

Vacuum Tube Voltmeter: Turner Op. Cit. page 38.

yellow t-20c52

2-250k dual potentiometers centering controls frequency control, vernier yellow t-20c52

2-250k dual potentiometers centering controls

frequency range switch on

open*

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