16-02-2014, 01:31 PM
I elected to draw it that way to show how the regulation works. The negative HT output goes through the biasing resistor for the two transistors and it smoothed at the center tap with a 50uf capacitor base to negative.
It is difficult to work out if it is a currant limiter or a voltage regulator.
It is clear that there are 4 windings and to get to the fault 3 will have to come off the bobbin.
The collector windings are wound over and under the secondary push pull audio style and lead out as two pairs to be linked on the tag strip. The transformer has been wound for the job so it is not just a backwards mains part.
The 6.3V heaters go across the battery directly.
It is difficult to work out if it is a currant limiter or a voltage regulator.
It is clear that there are 4 windings and to get to the fault 3 will have to come off the bobbin.
The collector windings are wound over and under the secondary push pull audio style and lead out as two pairs to be linked on the tag strip. The transformer has been wound for the job so it is not just a backwards mains part.
The 6.3V heaters go across the battery directly.
