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Old 6th September 2012, 04:49 AM   #11
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Old 6th September 2012, 07:01 PM   #12
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Either one of Q4 and Q6 can be mounted on heatsink together with Q1 and Q8. Also included will be some minor mods to accomodate different tastes. Some like well done eggs while others prefer...

A large selection of opamps can be used.
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Old 7th September 2012, 12:28 AM   #13
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Looking for constructors seeking fun and adventure.
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Old 7th September 2012, 06:57 PM   #14
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This amplifier will require, two supply voltages.
1. A regulated +/-15VDC
2. An unregulated +/- 40VDC, it is preferred that the regulated supply come off its own transformer
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Old 7th September 2012, 07:10 PM   #15
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The amp will sound as good as the selected opamp . I have not found a device yet that can do a better job than the TO3 MJ11032/33 in that position. C3 and C8 maybe increased to 22p.
R31,R32, D11 and D12 are optional.

Last edited by OnAudio; 7th September 2012 at 07:21 PM.
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Old 7th September 2012, 07:37 PM   #16
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Good job but the fuse is somehow too big?! I'd say yes.
The rest is well known amplifier topology with multiple disadvantages, but can turn into a kind QSC amplifier with some small adjustments.
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Old 7th September 2012, 08:07 PM   #17
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Thanks for your complements Don. What adjustments do you have in mind.
This amplifier may be more advanced....
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Old 7th September 2012, 09:38 PM   #18
evette is offline evette  Canada
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I,m In onsemi does make better sounding darlingtons than the ones listed. Evette
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Old 7th September 2012, 09:46 PM   #19
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Thanks Evette, What darlingtons do you have in mind
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Old 7th September 2012, 11:41 PM   #20
evette is offline evette  Canada
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2n6287/2n6284 IMHO are great sounding devices, and are pretty easy to drive. Evette
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