On Tue, 06 Mar 2012 06:40:59 -0800, Winston
put finger to keyboard and composed:

So, I retract my diagnosis and now think that pin 10
of F IV and both pins of diode "1.4 Stl" should be
cleaned and re-soldered.

AISI, if the diode were open, then that would disturb the bias on the
preceding stages (AF121 and AF124/125).

- Franc Zabkar
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