[dgardner]

Quote:

Originally Posted by sft gain=?, hfe=?(roughly) Sorry for my "short english"...

Amb and I measured 1/2 of my dynahi and got that measurement. The gain was set to 7.5

 

[sft]

That's reasonable. It's possiable to lower futher output impedance by choosing output transistors and following the origianl feedback.

Thanks for your reply.

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OK, this is the result for dynalo

psu: +/- 16.4V, gain=9X

No load, max output swing=5.8V rms
dummyload= 51R//91R, dale RN60, max output swing = 4.7V rms

 

[Solude]

Given the Senn 650 103dB/mW efficiency I think 62-73mW continuous is more than enough. With a cap of 4.3-4.7V I wonder why gains above 3x are even offered? Even a low voltage source would top out with that gain, wouldn't they?