[ARC5] Solid State Tube Replacements

[Robert Eleazer]

There was an article in the April 1977 issue of QST that gave schematics for building solid state replacements for some standard miniature vacuum tubes.  I built one and it did work on my NC-155.  The circuits mostly required high voltage transistors.

I replaced the acorn tube in a APR-4 tuning unit for the 74-320 MHZ range with a MPF-102 and the oscillator did work.

Wayne
WB5WSV   
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