14-04-2017, 04:12 PM
(14-04-2017, 03:42 PM)boater sam Wrote: I can't see any diodes in there ...
What do you think is between fins of the rectifiers if they aren't diodes?
As Refugee says, there are two distinctly separate rectifiers in there. The section with the most fins will be a half wave rectifier for the HT - the voltage rating of each diode is quite low so several in series are needed for high voltages - and the small section at the end is a low voltage bridge modified for half wave operation.
Their are five connections to a bridge like this: +ve, AC, -ve, AC, +ve so the two end +ve fins would always be connected together anyway and the centre vane is negative.
Can you trace out the circuit so that we can see what is happening? It won't be possible to provide much help without a circuit. Please include all discernible component values and socket markings.
