Phil Allison wrote:
Hi to all Quad lovers.

Anyone know why a DC voltage of 7.3 volts approx is present on pin 4 of
DIN output socket of Quad 33s ?

It is derived from the dial lamp supply.

Quad label it with the letter " P " .

Goes nowhere on a Quad 303 power amp.

http://www.geocities.com/quad_esl63/...atic/pre33.jpg

http://www.geocities.com/quad_esl63/...c/power303.jpg


Presumably so you could have a relay in your power amp to turn on the power,
a feature not found in Quad power amps.
http://groups.google.com/group/uk.re...6ce82af8aa0b6e

That pre33.jpg diagram is missing the earth connection on pin 2

--
Eiron.