Hi folks, I recently got the Priboj 50 which is a back in the day soviet made but rather nice sounding tube amplifier.
So I cleaned it out since it was left standing in an old shed for years.
Everything works except one channel has this distortion thing going on.It's not big but it's audible and the weird thing is that on lower frequencies like on bass kicks etc that channel moves the speakers weirdly.Like the speaker cone moves in but doesn't come the other way out, like it would amplify only one half period leaving the other one out.
this is my first hands on tube amplifier.I've only built and repaired semiconductor stuff.I do know the background in physics.
I checked the old electrolytic capacitors with a capacitance meter and they all hold up pretty much ok.
I also swapped the tubes from the other fine working channel and still the same problem persists for that channel , so it's not tube related , maybe it's the capacitors , I will change them later on anyway.
what else could it be any thoughts?
Not that much parts on each channel anyway. Maybe i should swap the caps to see whether that has something to do with it.
thanks.
So I cleaned it out since it was left standing in an old shed for years.
Everything works except one channel has this distortion thing going on.It's not big but it's audible and the weird thing is that on lower frequencies like on bass kicks etc that channel moves the speakers weirdly.Like the speaker cone moves in but doesn't come the other way out, like it would amplify only one half period leaving the other one out.
this is my first hands on tube amplifier.I've only built and repaired semiconductor stuff.I do know the background in physics.
I checked the old electrolytic capacitors with a capacitance meter and they all hold up pretty much ok.
I also swapped the tubes from the other fine working channel and still the same problem persists for that channel , so it's not tube related , maybe it's the capacitors , I will change them later on anyway.
what else could it be any thoughts?
Not that much parts on each channel anyway. Maybe i should swap the caps to see whether that has something to do with it.
thanks.