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previous: Doc What I don't know for sure is if th... -- 4/18/2000 5:13 PM

4/19/2000 3:24 AM
Ricky	Re: Sovtek 12AX7LPS A 12AX7 exhibits lower heater induced hum with an AC supply when each half of its heater is operated in parallel, rather than in the series 12v hookup (straight across pins 4&5). Doc, could you elaborate on this? this is what I was wanting to know about in my post about AC heaters. how is a 12ax7 wired in parallel? would this apply to power tubes as well? Ricky