Hey-hey!!!,
Seems that nothing is perfect enough in audio. I rigged the TX coupled pre with AC on its filaments and found it hum free. The previous linestage had DC everywhere, and a litle bit of noise.I changed the active load tubes to AC and a lot ov the fuzz went away.
So, is AC better than DC? Is only DC quiet enough?
Maybe...
So, how to make good DC? More importantly, can I start with AC and leave room to build DC later? Man, that's a bit simpler( and potentially a lot lighter ). I am seriously looking forward to removing about 10 lbs of filter Iron from the 12B4 linestage.
Oh well, it's been a fun weekend building and tweaking and of course listening with friends. Oh, seatbelt your amps when you travel...don't ask!
cheers,
Douglas
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