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My Monica 2 & It's 12B4 Preamp

Doug

I went whole hog on this puppy.
Constant current DC on the filaments.
Directly connected from the IC to the grid.
9V NiCad Battery on the cathode.
Batteries to run the DAC board.
MQ EXO-99 choke on the 12B4.
James JS-928 Power Transformer.
Raytheon GZ34 rectifier.
RCRC split RC filter before the choke.
Dave Slagle's Auto Transformer Volume Control on the output.
12B4 runs at about 16mA which sounds nice.

DanL





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  • My Monica 2 & It's 12B4 Preamp - danlaudionut 05:43:38 03/08/07 (0)


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