[Boatanchors] 12AX7 Pencil/Subminiature Sub?

qrv at kd4e.com qrv at kd4e.com
Sun Jun 1 15:05:09 EDT 2014

Might a pair of CK5672 or CK6612 or other subminiature
"pencil" tubes be substituted for a 12AX7 in a Q-multiplier
circuit like the Heath QF-1/HD-11/QD-125 design?

It would make retrofitting a boatanchor receiver easier
without the added hassle of an outboard Q-mult.


Thanks - David KD4E


David Colburn, KD4E - Nevils, Georgia USA

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Restored to design-spec at Heaven's gate 1Cor15:22

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