synthi
Well-known member
Hi People!
I just scored this beauty:
It´s a very early VK1 compressor, Serial #14. I`ve told this design is based in the altec (emi) compressor.
The tubes are:
1x 5AR4
2x 12AT7
2x 6BZ7
2x 6AL5
I need to revalve and adjust the unit, the channels are not matched and the tubes about to die... just changed the 12AT7s (the only tubes I had) with a matched pair the channels are more equal in gain, but I`ll need to replace all the tubes.
the 5AR4 is the rectifier, no problem, the 6AL5s I think are sidechain rectifiers (?) and the 6BZ7 the variable mu tube :?:
I want to get a pair of matched pair for each but nobody seems to sell matched pairs of those, so:
-Can anyone sell me a matched pair?
-Or... I could get some of each (10-15) but what values must I look for match the vari-mu tubes (and rectifiers)?
Here is a link to the new compressor manual (almost the same thing, different trafos):
http://www.jivelive.com/chiswickreach/assets/images/manual2.pdf
Now here is some p*rn, the circuit is all point-to-point and seems simple enought to be useful from the photos:
Thanks!
Synthi.
I just scored this beauty:
It´s a very early VK1 compressor, Serial #14. I`ve told this design is based in the altec (emi) compressor.
The tubes are:
1x 5AR4
2x 12AT7
2x 6BZ7
2x 6AL5
I need to revalve and adjust the unit, the channels are not matched and the tubes about to die... just changed the 12AT7s (the only tubes I had) with a matched pair the channels are more equal in gain, but I`ll need to replace all the tubes.
the 5AR4 is the rectifier, no problem, the 6AL5s I think are sidechain rectifiers (?) and the 6BZ7 the variable mu tube :?:
I want to get a pair of matched pair for each but nobody seems to sell matched pairs of those, so:
-Can anyone sell me a matched pair?
-Or... I could get some of each (10-15) but what values must I look for match the vari-mu tubes (and rectifiers)?
Here is a link to the new compressor manual (almost the same thing, different trafos):
http://www.jivelive.com/chiswickreach/assets/images/manual2.pdf
Now here is some p*rn, the circuit is all point-to-point and seems simple enought to be useful from the photos:
Thanks!
Synthi.