Dave wrote:
1) Do you have any suggestions for a replacement for the LM394CN, which is obsolete and unobtainable from any reputable source? There are plenty on eBay for a few $'s from China, but the probability of them being fakes is greater than 0.99. The MAT12 seems to be one possible candidate for a replacement and while not cheap, is available from reputable sources like Farnell.
The MAT12 should certainly work, but there is *plenty* of DC degeneration in the circuit (1v at each emitter), so there is no advantage to matched transistors. A pair of Zetex (Diodes, Inc.) ZTX849 or FZT849 actually have significantly lower voltage noise than either the LM394 or MAT12.
Best regards, Charles _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
