Dave Plowman (News) wrote:

Not always transformer output, though - high impedance speakers were
fairly common.

Those came later, surely, with complementary output stages - AC127s &
AC128s?

I've got a working 'Good Companion' I bought as a kit with my first pay
from the BBC. Micro alloy transistors and transfilters...

Popular kit that. A school friend of mine built one; he ended up
working for the Beeb too, at Pebble Mill. I remember being shown round
the CAR and studios there when it was all fairly new.

--
Andy