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Circuit rev 2.2




In response to various ideas that have come up , I've revised the circuit slightly:

* The first power supply capacitor is now shown as two 100uF/350v caps in series, to provide a better voltage margin for long capacitor life.

* The lower 2A3 cathode bypass cap is raised from 250v to 350v so all the caps are the same.

* I have added a capacitor (also the same) from the tap on the 2A3 cathode resistor to ground; this reduces hum to the driver stage. Thanks to drlowmu for bringing this possible issue to my attention!

With these changes a pair needs ten identical capacitors, which is a common price break point.

I'll revise further if there are issues with the amp once a few have been built.

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