[G0HZU_JMR]

From memory I think it outputs just over 8V and this is also current limited. I think the circuit can cope with a short circuit at the output and the current limit is defined by a resistance value. I can't remember what the current limit is but I do recall that this circuit is quite robust. However, failures did occur and a lot of repairers put a slower PNP device in place of the 2SA473. Ideally, this circuit needs to cope with input voltage fluctuations at audio frequencies and also it will be fast enough to cope with fast impulse changes as long as the original 2SA473 is fitted (not something slower and cheaper).

However, I'm remembering this stuff from a long time ago so I may have got a few details wrong.