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Old 20th May 2019, 05:55 PM   #11
felipeunix is offline felipeunix  Germany
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Originally Posted by xrk971 View Post
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What software simulator spice is this?
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Old 20th May 2019, 06:32 PM   #12
tomchr is offline tomchr  Canada
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I'm thinking PSpice.

Modulus-86, 186, 286, 286 Kit, & 686: 40-240W (8Ω) at <-120dB THD. HP-1: 3W/20Ω, -130dB THD, 128dB DNR.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
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Old 20th May 2019, 09:57 PM   #13
AKSA is offline AKSA  Australia
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Location: Melbourne, Australia
Thanks for sharing, Nico and XRK, and for the attribution for a very good but simple amp!
I think that whilst SE delivers prominent even order - lop-sided asymmetric on the waveform - a balanced format creates identical even order on each half, giving a top and trough asymmetrical distortion which is odd. For that reason, I prefer to hear this amp in SE rather than balanced.
Rather than cancelling even orders, a balanced situation (which requires a unipolar supply BTW) tends to duplicate the same distortion top and bottom so turns it into odd order.
The big advantage is always simplicity and low cost. I would think offset would not be an issue with good gain setting resistors, 2x33R, but this is important because many HP do not take kindly to DC.

Aspen Amplifiers P/L (Australia)
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Old Today, 03:45 AM   #14
Nico Ras is offline Nico Ras  South Africa
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Originally Posted by tomchr View Post
I'm thinking PSpice.

Kindest regards
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