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Philco Model 66 120hz hum in speaker
morzh
Odobenus rosmarus
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Posts: 18,427
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#9

03-28-2020, 12:31 AM
Dumb question,

Do you see any signs of rework on your speaker?
I am implying the possible humbucking coil inversion.

Also:

Is the filament winding if the power xfmr grounded at centerpoint as per sch?

Is your AC plug plugged into outlet or via isolation xfmr/Variac?
What happens if you invert your AC plug polarity while plugged in the wall outlet?
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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RE: Philco Model 66 60hz hum in speaker - by morzh - 03-28-2020, 12:31 AM
RE: Philco Model 66 60hz hum in speaker - by Chas - 03-28-2020, 12:41 AM



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