Graham ,

I get a stream of them in with PSUs that shut down, blow fuses, etc (current
a pair of '142s'). They all seem to suffer from extreme temperture from the
2 x 3T regulators on that little U-shaped heatsink rod. No osciallation,
and load seems normal per channel-strip (those little shorted yellow caps
+17 to -17 is a different story).

Is it 'normal' that the 3Ts run the heatsink almost too hot to touch, or is
there something more obscure causing this, AC secondary comes out 22v as it
should, so it's not that. Surely they don't all run that hot ?

geoff