NOTES & ERRATA `Shoestring' stereo amplifier (December 1994) The schematic diagram on page 59 should show C12's negative (rather than positive) terminal connected to pin 3 of IC3. Also, while all of the overlay diagram's connections (page 60) are correct, the labeling of the +/-21V supply wires on the power amp PCB is reversed - that is, `-' should be near the top (connecting to pin 3 of IC3), and `+' at the bottom (pin 5).