alexidoia
Well-known member
Hi there,
I am the happy owner of a 4 channel 1290 mic preamp that I built 6 years ago.
I have always been happy with it but yesterday I used a configuration (which I never used before) and my preamps two of them started crackling and even saturated., they also produced a lot of noise.
I said this was a new configuration, because I used two Coles 4038, 6 feet away from their source (which was very quiet, = acoustic guitars) . These mics (which by the way have been re-ribboned) need a lot of gain, habitually they feed into some ampex that I have (which were not available at that time).
The point is that I had to push the gain of the 1290 practically to full rotation (minus 2 stops to be precise).
So my questions :
- is it normal that I got this kind of behaviors having pushed the preamps too far.
- if not, what (in the circuit) could cause such problem, what should I be looking at to fix my preamps ?
Thanks a lot.
Alexandre
I am the happy owner of a 4 channel 1290 mic preamp that I built 6 years ago.
I have always been happy with it but yesterday I used a configuration (which I never used before) and my preamps two of them started crackling and even saturated., they also produced a lot of noise.
I said this was a new configuration, because I used two Coles 4038, 6 feet away from their source (which was very quiet, = acoustic guitars) . These mics (which by the way have been re-ribboned) need a lot of gain, habitually they feed into some ampex that I have (which were not available at that time).
The point is that I had to push the gain of the 1290 practically to full rotation (minus 2 stops to be precise).
So my questions :
- is it normal that I got this kind of behaviors having pushed the preamps too far.
- if not, what (in the circuit) could cause such problem, what should I be looking at to fix my preamps ?
Thanks a lot.
Alexandre