Motorola ts4j

[bandersen]

Keep in mind that the resistance of tube filament is temperature dependent. I really doubt that is the source of your problem.

Keep in mind what Tom posted earlier. B+ is created by the balance of several tubes. If it's off then either the tubes supplying current are not passing enough or the tubes drawing current are sinking too much. That could be caused by the tubes being bad or they are not biased correctly. Try swapping tube and check the voltages on them.

[timmy]

Originally Posted by bandersen

Keep in mind that the resistance of tube filament is temperature dependent. I really doubt that is the source of your problem.

Keep in mind what Tom posted earlier. B+ is created by the balance of several tubes. If it's off then either the tubes supplying current are not passing enough or the tubes drawing current are sinking too much. That could be caused by the tubes being bad or they are not biased correctly. Try swapping tube and check the voltages on them.

I already checked voltages on the tubes that are supplied by b+ and they are good this is why it's baffling to me and I did try other tubes,6sl7, 12sn7s, 25l6 even checked resistances of the ballast.