IMPORTANT NOTE: The circuit shown in the book has several mistakes. The emitter eyes are oriented incorrectly
(see fix below) and the "Sensitivity Subcircuit" is not configured correctly. Wilf Ritger, creator of this circuit hack, pointed
out the mistake to Gareth Adams on the Yahoo! BEAM group. Thanks to Gareth (hey, nice name!) for calling
this to our attention and for fixing the circuit illustration.