"Phil Allison" wrote in message
...

Gareth Magennis wrote:




Bottom line, Phil called this correctly IMHO.

No way a reversed bias diode would not have destroyed the output stage in
a
few seconds.


** Of course.

If the original 4004 was leaky, that would explain a lot.


..... Phil



Gareth.





And yes, the schematic doesn't make sense, you don't get an (apparently
expected?) -65v bias from a 100v tap and a (faulty) diode.

You would, however, get rather a large amount of crossover distortion from
such a tap, for as long as the caps held up.



Gareth.