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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: can you provide more info, please? posted by John Swenson on May 10, 2004 at 14:35:30:
John, this is way too cool an idea to drop!Seems to me there was a fairly high impedance P-P transformer in the "Brooklyn" line at one time (old Freed designs). Not 40k, but maybe 10k-15k (?). Those were, IIRC, butt-stacked for a tiny airgap. If your power is low, maybe they could be stacked in 50% nickel for more inductance; if the balance is really good, maybe even interleaved. I have my doubts about mumetal (80% nickel) but who knows? You'd have to jigger the load, put a 16 ohm speaker on the 4 ohm tap or something like that. Maybe one of those toroid 4-8-16 ohm impedance converters following the OPT?
Now, take your Toshiba DVD and run a B7-5k from the DAC output, grounded to the 2.5v reference pin. The transformer will provide a 2nd order LP filter, and produce balanced (push-pull!) output. Not a bad way to drive this power amp - you could even do a Sakuma-style 6AR8 driver/6AR8 output... :^)
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- Re: can you provide more info, please? - Paul Joppa 22:04:45 05/13/04 (0)
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