mata_haze
Well-known member
Hello everybody,
I have just bought a couple of Neumann 476B.
the owner claimed there was discrepancy between hot and cold pole at the output, in fact the cold output is roughly 6 dB lower than the hot.
both units are connected via their own 13 pin connector, all connections are made by me so I don't think there are are problem on that.
the signal seems to be pretty healthy until the output transformer (pin 1 between C37 and R66) but then it becomes uneven if I put my scope directly at the transformer output( pins 5 and 6).
I also know the modules were not really looked after and the previous owner had smoke coming out of them.
unfortunately I cannot see anything obvious, I have recapped most of the unit, went trough connections and so on, but nothing has improved.
Both units behave the same although one was working fine for a while (when I just bought it) and then went wrong.
Now the question is:
by looking at the output transistor configuration, would it be possible for the output to be uneven if one of the two is not working?
IE if the output pair is not actually paired or it is faulty would that cause any difference at the level in the output trafo?
any (really any!) suggestion will be much appreciated.
Best,
Mattia.
I have just bought a couple of Neumann 476B.
the owner claimed there was discrepancy between hot and cold pole at the output, in fact the cold output is roughly 6 dB lower than the hot.
both units are connected via their own 13 pin connector, all connections are made by me so I don't think there are are problem on that.
the signal seems to be pretty healthy until the output transformer (pin 1 between C37 and R66) but then it becomes uneven if I put my scope directly at the transformer output( pins 5 and 6).
I also know the modules were not really looked after and the previous owner had smoke coming out of them.
unfortunately I cannot see anything obvious, I have recapped most of the unit, went trough connections and so on, but nothing has improved.
Both units behave the same although one was working fine for a while (when I just bought it) and then went wrong.
Now the question is:
by looking at the output transistor configuration, would it be possible for the output to be uneven if one of the two is not working?
IE if the output pair is not actually paired or it is faulty would that cause any difference at the level in the output trafo?
any (really any!) suggestion will be much appreciated.
Best,
Mattia.