Jeremy.Starseed
Well-known member
Hi guys.
For months I have been changing out capacitors in an old modular desk from 1967, made for the Swedish Radio Company.
It uses Lundahl transformers on the inputs and has 12 channels, 6 aux sends and some pretty cool functions that may or may not be of use these days. (Quad pan busses, for example? And no pan on regular channels, either L or R). In any case the thing is built incredibly well.
I have a specific question at this point. What is this low frequency noise? I haven't come across anything like it before.
http://www.mothershipmastering.com/uploads/Deep_oscillations#01.wav
Apart from this noise which exists in several of the summing sections, but not on any of the channels individually, the console is relatively noise free already. Hard to be happy about that though, with this enormous pulsation going on.
So, I'll be really happy to post circuits and any details if this will help you get an idea of how to improve the current state of this once glorious desk.
For months I have been changing out capacitors in an old modular desk from 1967, made for the Swedish Radio Company.
It uses Lundahl transformers on the inputs and has 12 channels, 6 aux sends and some pretty cool functions that may or may not be of use these days. (Quad pan busses, for example? And no pan on regular channels, either L or R). In any case the thing is built incredibly well.
I have a specific question at this point. What is this low frequency noise? I haven't come across anything like it before.
http://www.mothershipmastering.com/uploads/Deep_oscillations#01.wav
Apart from this noise which exists in several of the summing sections, but not on any of the channels individually, the console is relatively noise free already. Hard to be happy about that though, with this enormous pulsation going on.
So, I'll be really happy to post circuits and any details if this will help you get an idea of how to improve the current state of this once glorious desk.
