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GrimJosef · 23rd Mar 2020, 8:35 pm

I'd use a load resistor too.

I'd also make sure that in the absence of the 22 I had some other RELIABLE, FAULT-CURRENT CAPABLE, mains earth connected to the II's chassis. Don't rely on the ground of the signal input lead.

It might also be handy to know that if you look at the outside of the mains chassis plug the left pin is wired to the COM terminal on the mains transformer primary and the right one is wired via the mains fuse and voltage selector to the 200/220/240V terminals. So it should be mains neutral to the left and live to the right.

Cheers,

GJ

23rd Mar 2020, 8:35 pm	#4
GrimJosef Dekatron Join Date: Sep 2007 Location: Oxfordshire, UK. Posts: 4,311	Re: Quad 11 test run I'd use a load resistor too. I'd also make sure that in the absence of the 22 I had some other RELIABLE, FAULT-CURRENT CAPABLE, mains earth connected to the II's chassis. Don't rely on the ground of the signal input lead. It might also be handy to know that if you look at the outside of the mains chassis plug the left pin is wired to the COM terminal on the mains transformer primary and the right one is wired via the mains fuse and voltage selector to the 200/220/240V terminals. So it should be mains neutral to the left and live to the right. Cheers, GJ __________________ http://www.ampregen.com Last edited by GrimJosef; 23rd Mar 2020 at 8:43 pm.