Cascode VCA compressor...sounds sweet, some pictures!

Hi people, some time ago I picked up these boxes:

http://img.photobucket.com/albums/v436/IJR/a.jpg

and they were in my junkyard...till good idea came into my crazy head...

http://img.photobucket.com/albums/v436/IJR/b.jpg

just to try out circuit posted elsewhere at this forum loong time ago,
it was cascode type vca tube compressor done by one very cool man...
I changed some stuff and wound input, output and sidechain trunny's...

After some freakin'....this is the thing!

http://img.photobucket.com/albums/v436/IJR/c.jpg

It sounds wery sweet, punchy, have pretty good headroom
and GR range, just....excellent sounding VCA!
Thinkin' to add nice sidechain for the next one!

http://img.photobucket.com/albums/v436/IJR/d.jpg
http://img.photobucket.com/albums/v436/IJR/e.jpg
http://img.photobucket.com/albums/v436/IJR/f.jpg
http://img.photobucket.com/albums/v436/IJR/g.jpg

:guinness: :sam: :guinness: :sam: :sam:

http://img.photobucket.com/albums/v436/IJR/hennessy.jpg

Looks absolutely cool. If they sound like they look... :grin:
How long have you worked on them?

Igor, You are my hero. Very Nice!

What is the device in your workshop that looks like a mag-light and PVC pipe?

-Chris

What is the device in your workshop that looks like a mag-light and PVC pipe?

Click to expand...

Hehe...you mind 60w medical laser outlet? Use this for laser-engr.

If they sound like they look...

Click to expand...

They sounds even better)
I don't like sound of VaryMoo, but wery liked sound of
original EAR660, it is a way cleaner, lows less distorted...
Still not compared with original, but was wery impressed from silky,
clean, but very punchy sound.
I spent about 2 weeks on in/out trunny's design,
input wound on ui-31 superperm magmet lams,
and out wound on ei-625 80% Ni Japanese permalloy...
changed a bit VCA as well, to use 5670 instead of ecc189,
reason is imho 5670 sounds better in vca, and it have excellent balance beetween triodes...
Problem with this tube is gr curve in normal vca connection, it is sharp cutoff...but somehow, it works fine in cascode vca.
I got -10v/12db GR, it is more convinient for SS sidechain, anyway, used
same sidechain like in EAR schematic.

Igor: looks fantastic! :shock: Inspiring to see, I wish I could find some cool looking scrap boxes like that.

There was a thread sometime ago about a comercial unit using cascoded gain reduction stage...

http://www.groupdiy.com/index.php?topic=16526&start=0&postdays=0&postorder=asc&highlight=

Hiya Igor,

Looks the buisiness, Old Bean :thumb:

Stunning transformation!

:guinness:

Way cool!


Justin