Northern Electric 6386 AGC/compressor

[MaxDM]

Attached is a very old schematic, I made in my teens, when I repaired an old Northern Electric limiter. I forgot to put the value of the plate resistors of the 6386, but I guess they were the same as other compressors of the time. What I found interesting, looking at it again, is the double filtering of the GR signal, which would make for a very slow attack, IMO.

 

[abbey road d enfer]

What I found interesting, looking at it again, is the double filtering of the GR signal, which would make for a very slow attack, IMO.

Considering there is no interstage xfmr or differential coil, this is mandatory for deling with thumps.
I would think of it more as an AGC than a limiter.

 

[emrr]

Agreed, AGC. I haven’t seen the filtering done that way.

 

[Videon]

Attached is a very old schematic, I made in my teens, when I repaired an old Northern Electric limiter. I forgot to put the value of the plate resistors of the 6386, but I guess they were the same as other compressors of the time. What I found interesting, looking at it again, is the double filtering of the GR signal, which would make for a very slow attack, IMO.

I have one of these devices (working when taken out of service), I have no current need for it and am trying to find homes for about 140’various pieces.
Do you have a sense of value or know if anyone who would like to have it?

 

[Videon]

I have one of these devices (working when taken out of service), I have no current need for it and am trying to find homes for about 140’various pieces.
Do you have a sense of value or know if anyone who would like to have it?

I also have an RCA BA-6A

 

[abbey road d enfer]

I have one of these devices (working when taken out of service), I have no current need for it and am trying to find homes for about 140’various pieces.
Do you have a sense of value or know if anyone who would like to have it?

You may want to post in the Black market section.