In a message dated 4/4/02 10:14:48 PM Pacific Standard Time, newaag@...
writes:

<< 20kohm. You want to try soldering
a 10 to 100 pF cap directly across the leads of these 4 feedback
resistors listed above. For experimenting, use any cap available,
even ceramic. If this improves the sound, you have eliminated a high
frequency problem, most likely oscill >>
And very short leads- at 100mc even small caps can be resonant. Bad news.
Use the smallest micas you can find.
MZ