Tube DIY Asylum

Posted by Pär (A) on December 21, 2004 at 23:34:50

In Reply to: Why are 6DJ8 so hum prone posted by Gusser on December 21, 2004 at 11:18:20:

Hi,

Probably some problem at input of tube (control grid).

A small "ripple" on input of a ECC88 will make a five times higher current flow change that in a 6CG7 ("raw" 12.5mA/V compared to 2.6mA/V)
(If it hadn't been CF you would have had another problem if you use them as "direct repacements")

Check out the wireing to the control grid.

mvh /Pär