In article ,
Form@C wrote:
What is the aux DC output on the quad 33 rated at and what was it
intended to power? I'm just interested and wondering if if could feed
a headphone amp...

I'd say probably to switch a relay which handled the mains on a high
powered amp - the switched mains outlet from the 33 is pretty weedy.

mmm... good idea - I hadn't thought of that! It doesn't do anything in
the 303 though, so they may have been thinking of more power at some
time.

Well, Quad stuff was often used (modified or altered) for pro work, and I
seem to remember reading that was what it was provided for.

It's only half-wave rectified, which makes sense for a relay.

Yes, and IIRC only 100 µF of smoothing - so not designed for much in the
way of 'audio use' current.

--
*Always drink upstream from the herd *

Dave Plowman London SW 12
RIP Acorn