Posted by Tnuctipun [ 64.12.116.14 ] on January 30, 2005 at 14:08:03:

In Reply to: Re: autoformer Iron? posted by Damir on January 30, 2005 at 11:32:45:

I did not measure the copy(yet). I got them 2 days before the 2004 Oswalds Mill Tasting meet. I slapped them in, 30% taps to the E-Linear driver, 50% taps to the g2. Got 6 Watts from a pair of HY69's. Sounded pretty good.

I got an improvement when I put g2 to the 30%. 9.5 Watts and a bigger more natural sound. I keep grinning to myself every time I hear something soooo inexpensive sound so good.

I ran the amp with a signal generator, and go no misbehaviour at the frequency extremes. 9.5 watts down to where my signal generator got a bit loopy( ~16 cps ), and it ran out into the ultra-sonic with out any wiggles in the curve. I will do a more comprehensive measurement when I am done with the new linestage.

As far as other ratings, like DC I would stick with the originally published specs. I think it was 120 mA per leg, and 10% imbalance. With fixed bias, I can get to a small fraction of that easily.
regards,
Douglas

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