So I spotted this Philps AG9015 amp for sale in a radiogram: https://www.avforums.co.za/index.php/topic,8971.msg1044072.html#msg1044072
Took a bit of searching to find it - there are a few similar models, some of which are output transformerless. So I looked around more and saw they can have OPTs, but examining the schematic shows an interesting output stage topology. Discuss for 25 marks.
The OPTs are quite weird-looking things:
Full circuit:
Took a bit of searching to find it - there are a few similar models, some of which are output transformerless. So I looked around more and saw they can have OPTs, but examining the schematic shows an interesting output stage topology. Discuss for 25 marks.
The OPTs are quite weird-looking things:
Full circuit: