In message .com, Andy
Green writes
Has anyone got the circuit diagram of the printed circuit board in the
Potterton Profile Control Unit?
In particular can anyone tell me the resistance value of the resistor
R15? The painted bands have gone on the one in my unit.

.... Shuffles feet

yes, but the answer is - you're wrong

It's put there to catch people out who don't know what they are doing


--
geoff