"Fred McKenzie" wrote in message news:fmmck-2F9622 Of
course the reading is only relative, but is quite handy when you need
to tune for maximum output. In some cases I've permanently wired these
test points into the circuit. That way you don't change tuning by
removing the circuit.

Fred
K4DII

It would be easy to cobble a FET cathode follower to avoid
the loading issues, but that might be more than the OP wants
to get involved with.