UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 20s Audio xfmr with deliberate shorted turns Why?

G6Tanuki · 25th Feb 2020, 6:34 pm

Could it be some sort of 'hum bucking' arrangement for when the transformer's used in something powered from a battery-eliminator?

Feeding a bit of AC or ripple through such a small winding could be enough to null-out hum in the stage the transformer is feeding.

25th Feb 2020, 6:34 pm	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: 20s Audio xfmr with deliberate shorted turns Why? Could it be some sort of 'hum bucking' arrangement for when the transformer's used in something powered from a battery-eliminator? Feeding a bit of AC or ripple through such a small winding could be enough to null-out hum in the stage the transformer is feeding.