We have found that changing some of the component values will give slightly
better performance. This doesn't mean that you have to change these
components. But it will be a good idea to use the new values if/when building
These components have changed:
D7: Changed from 5V6 to 6V2.
C2: Changed from 10uF/6V3 to 68uF/6V3. Package is bigger than original.
R1: Changed from 10k to 47k.
R4: Changed from 1k to 47k.
R5: Changed from 3k9 to 270k.
R6: Changed from 10k to 270k.
(C) 1999 Bo Brændstrup
Revised: December 7, 1999