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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Could be, but what if he's linked the speaker gnd via heater gnd... posted by breadhead on April 5, 2007 at 15:48:18:
Just turning, or rotating an OPT is not always turning the field linkages 90 deg out of phase. If both power and output are mounted on the same core side, assuming both are E/I construction for illustration, then rotating either will still leave the coils of both linked. You need to turn one or the other on to the short side of the core to unlink the coils. You would need to mount the power or output, the one not on it's short side, belly down on the chassis to unlink both coil and core. You can of course fiddle with this scheme at length, but if a three axis rotation does not reduce the hum and you have also picked the power transformer up off of the chassis to break that potential link, then you have a problem elsewhere.If the noise is a buzz it could just as easily be radiation from the rectifier circuit wires or B+ transformer wires.
Bud
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- Re: Could be, but what if he's linked the speaker gnd via heater gnd... - bpur 13:14:59 04/06/07 (0)
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