Hi
I have a Leben 300F with one problem, when playing test tones around 60Hz you clearly can hear that the sound level is much less in one channel than the other. (I have been switching all tubes back and forth and so no problem there, also replaced all of them with new tubes). When the frequency is above 100Hz or something the output seems the same in both channels.
I previously had one output tube with a short which burnt a grid resistor that I replaced(with same value), could some other part have been damaged so it could cause the low frequency problem in one channel?
(A very odd thing is that the shorted output tube was the first tube in left channel, and the frequency problem is located in the right channel).
Any tube specialists with an idea about this?
Regards
Orwak
I have a Leben 300F with one problem, when playing test tones around 60Hz you clearly can hear that the sound level is much less in one channel than the other. (I have been switching all tubes back and forth and so no problem there, also replaced all of them with new tubes). When the frequency is above 100Hz or something the output seems the same in both channels.
I previously had one output tube with a short which burnt a grid resistor that I replaced(with same value), could some other part have been damaged so it could cause the low frequency problem in one channel?
(A very odd thing is that the shorted output tube was the first tube in left channel, and the frequency problem is located in the right channel).
Any tube specialists with an idea about this?
Regards
Orwak