New valves question [Archive] - The Art of Sound Forum

oceanobsession

14-07-2011, 19:44

I bought a set of eight el84 ei valves which have a 3 month warrantee now
ive noticed one of them has to be set to full on the individual trimpots this
just leaves it short of 250mv setting now none of the others have this
problem i bought a matching quad and two matching pairs its one of the matching pairs that has the problem would i have cause for complaint.

Ali Tait

14-07-2011, 20:11

Worth a try. Who'd you buy them from?

oceanobsession

14-07-2011, 21:01

Worth a try. Who'd you buy them from?

tube-shop

Ali Tait

15-07-2011, 04:13

I'd get in touch and see what they say.

steveinfrance

20-07-2011, 14:48

I bought a set of eight el84 ei valves which have a 3 month warrantee now
ive noticed one of them has to be set to full on the individual trimpots this
just leaves it short of 250mv setting now none of the others have this
problem i bought a matching quad and two matching pairs its one of the matching pairs that has the problem would i have cause for complaint.

Does the problem move with the valve? If not could be the pot or cathode bias resistor.
Steve