Tube DIY Asylum

RE: Hum pick-up answer ( .05mv ok.... other sources are usually worse

76.89.88.245

In Reply to: RE: Hum pick-up posted by thermionic addictions on July 02, 2009 at 14:03:15

If you are measuring 37mv....something is seriously wrong...some grounding problem...or winding problems in one of the transformers etc.

usually actual radiated magnetic field...i.e. induction hum...is very small if you are at all careful about tranformer orientation and layout.

<.1mV almost always, or around there.... in the SE business there is a sensitivity to hum, so through really listening, and measuring various layouts, around .05mV is really possible.

ok..
Good Luck,
-3db

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