Quote:
Originally Posted by madmike17
Its an 8 pin socket, the vibrator has 4 pins. there is an arrow on the chassis which can point to either a + or - marked on the vibrator. So to be clear: I should connect the pin connecting to the coil to 6 volts and the case to ground. The pulsed DC can be measured with a scope on the two larger pins. Is this what needs to be tested now?
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Here's what I would do FWIW: Put your meter across C34 and 'blip' power to the radio just long enough to see that correct polarity is appearing across C34. That'll confirm if supply polarity is correct. Then switch the meter to AC, power up the radio and see if you've got equal AC voltage
from center tap to both ends of the HV secondary. If so, this'll pretty much confirm the vib is healthy and the points are good.
I always looked at filing points as the last resort.
Well son of a gun, upon blowing the schematic up to full size, C34 is actually .10 mfd, not a 10mfd electrolytic as i originally thought. That's why C34 didn't get cooked by reverse polarity and C29 did.