Well, I did my homework.
I swapped the resistor for a NEW one. I was told that 2R2 means 2.2 Ohms, and so I bought a 2.2 Ohm one.
It virtually BLEW up in flames when I hooked up the battery. That was that for it.
Say voltage U = 12 Volts.
Now, U=R*I, and this means I did put roughly 6 Amps through it.
With
P=U*I it means 72 Watts.
Hey, it's
only specified for 1/4 Watt !
What value is this R1 resistor ? Is is 2000 Ohms ? Misprint on the plan, should have read 2k2 and not 2r2 ?
IF 2.2 Ohms is correct, then, why is it blowing ? I removed the cable to the pod first, but still, bang, hot.
I did swap the LM342 for an 7805A one, is this the correct replacement ? D1 was loos, so, I resoldered it, and D4 is NEW, too....
Carsten