Originally Posted by Paul

I'm putting together the bits to build the tandem match from the 2001 ARRL
Handbook. I do not have the original QST articles, but Googling has revealed
that some builders have had a few problems, particularly those using the FAR
Circuits PCB.

There's one thing I don't understand about the schematic and that just looks
plain wrong. If both W2 and W3 jumpers are present, the 5.6k resistor is
shorted out, thereby connecting the -2.5V and V- rails together. Surely this
can't be right, or am I missing something?

Regards,

Paul G3ZCU