Hi, I was given a Dynatron stereo amp SRX26 with one channel not working. Likely failed components are the output transistors AL103 4J according to my research. I tried replacing those on the bad channel with 2 ‘new’ ones but no improvement. I then removed and tested all the transistors with the diode test on my multimeter. The resulting voltages are shown in the picture, hopefully this is self explanatory!
OLD 3 and OLD 4 belong to the good channel and match well.
OLD 1 and OLD 2 also seem to match though with different figures to the above.
Ditto NEW 1 and NEW 2 .
My query is, should OLD 1 and OLD 2 work as a pair. If so the problem must be elsewhere in the circuit, probably the large elec. caps.
The same query applies to NEW 1 and NEW 2.
Would be very grateful for any help
OLD 3 and OLD 4 belong to the good channel and match well.
OLD 1 and OLD 2 also seem to match though with different figures to the above.
Ditto NEW 1 and NEW 2 .
My query is, should OLD 1 and OLD 2 work as a pair. If so the problem must be elsewhere in the circuit, probably the large elec. caps.
The same query applies to NEW 1 and NEW 2.
Would be very grateful for any help