I'm looking for a schematic, or at least hookup information for the
Accu-Keyer.

Mike-

The original article was in QST magazine, written by WB4VVF from the Orlando,
Florida, area. I understand he still lives in the area. According to the QRZ
data base,

WB4VVF
JAMES M GARRETT
1141 KILLAWE TER
CHULUOTA FL 32766

If you don't find what you're looking for, you might write Jim directly.

I also have an AccuKeyer, but don't have any idea where the documentation is.
As I recall, the original design was intended to key a vacuum tube transmitter
with grid-block keying. It is supposed to work with the more modern solid
state rigs as well, but sometimes the offset voltage of about 0.7 volts, is too
much. I modified mine by removing the high voltage PNP keying transistor, and
used the NPN transistor of the preceding stage to key my rig.

I don't have any documentation handy, but I'd be willing to look into mine if
you have specific questions.

73, Fred, K4DII