Allison Gain Brain, FET's etc.

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[quote author="barclaycon"]Well the originals were Kepex and Gain Brain made by Allison Research and designed to fit in their rack. They were FET-type units.
Paul Buff who designed them (and whose first wife was named Allison) then teamed up with someone else and formed Valley Audio.
He had subsequently developed the Valley People VCA - I think from work done on automation systems such as Little Helper and the Allison mix system (horrible systems!) and when they relaunched Kepex and Gain Brain under the Valley banner (and in a new rack format) they called them Kepex 2 and Gain Brain 2.
As you say, these units used the Valley VCA (EGC 101 I believe).
I feel I am becoming a historian![/quote]


Hi Barclaycon,

Yes you are correct, the first Gain Brain and Kepex were Class A, Discrete designs which fit into the AR racks. Paul then moved to Nashville and merged with Valley Audio and the resultant company was Valley People which introduced the 800 series racks and the later monolithic opamp designed GBII and KII using the same VCA.

Paul left the company in the early 80's and sold it to Norm Baker and my good friend Michael ' Doc' Morgan, who was the product designer and CTO at Valley who ported the Alison stuff across and was responsible for many of the later designs at the same time a name changed occurred and it became known as Valley International.

Sadly due to bad business decsions the company went bankrupt and the assests were sold to different companies and landed up in the hand of Brock at Galaxy Audio who tried to reintroduce some of the products under the Valley Audio name and later closed it again.

The exciting and good news is that I found out earlier this week that Alan Hyatt of PMI Audio (Joe Meek, Toft, Studio Projects etc) have just acquired the assets and hopes to have some of the modules/units back in production by the end of the year.

Here is the Press Release that was issued.

-------------

We are pleased to announce we have acquired the assets of the original Valley People aka Valley Audio company. Valley Audio has been a well respected pro audio company since the 1970's with years of pro audio experience, and was a leader in VCA technology for many years.

I can't think of a hit record in the 1970's, 80's, and 90's that did not have Valley Audio on it. Unfortunately, the company went through some bad years with the selling of the company a few times, and then basically sitting idle for many years under the ownership of Galaxy Audio.

Well, PMI has purchased the company, and we are now in the process of sorting it all out, and will introduce the company again at the end of this year with some familiar models, and some new things as well. We are confident we can bring Valley Audio to market with the same quality and flexibility at an affordable price point.

To me, the Keypex, Gain Brain, MaxiQ, Dynamite and the 401 vocal processor are as effective in today's market as they were in years past. So look for more information on this in the coming months, and we will do our best to get this gear out by AES.

-------------

I called up Alan earlier this week and we chatted about Valley and I've put him back in touch with Doc Morgan and Paul and hopefully we will see some new designs overtime from the Valley 'Brain Children'.

I for one am really happy to see this happening and have confidence that Alan will build the units to the original spec and design.

I'm having lunch with Doc today and so if there are any specific Valley questions post here and I'll try get you and answer.

Cheers

Matt
 
Hello,

The link to the Gain Brain manual seems to be down again. The great high-res Gain Brain card photos and schematic are up, but not the manual.

Anyone have this that grabbed it earlier this year, or can it be made available on the server again?

Thanks!
 
heh...

We used to have a rack of Meyer gates, and a cople of Kepexes. The Gain Brain was WONDERFUL compressor... I loved it on kick drums and Saxes for some reason.

When we bought our first Drawmer gate however, we realised that it did MUCh more than either the Kepex or the Meyer.

Keith
 
For years the Kepex reigned supreme as the preferred noise gate.
And the combination of Kepex followed by Gain Brain was also a standard feature for snare drums.
I can remember during the disco era we had a tape loop of applause which we fed through a Kepex keyed by the snare - instant on-the-beat handclaps!
I always felt that the Meyer's were a cheap imitation.
Drawmers were OK but I still think the release characteristic on the original Kepex was spot on.
I've kept a couple of Gain Brains because there is still something about their sound. Most of Paul Buff's other designs sound good.
I was hoping to get some Valley boards from Mr. Brent Casey, but it looks like that was all talk (ref. April).
 
I also have some gain brain modules that I will rack up soon...

I think that are some top class compressors...

mat


>> edit: I'll fixed the broken link... <<
 
I have the manuals, tech notes and schematics with overlays for the newer IC designed 800 series units ala Valley People/International etc including the GBII, it is over 20MB as a PDF... it is at the studio/tech shop I can upload it if it proves useful?

I own an 800 series rack with 4 x GBII, 2 x KII and 2 x MaxiQ, love em all and look forward to seeing them back in production!

Matt
 
I too, have two complete racks of Kepex/GainBrain, both the original and version II. I also have 4 of the Valley 400 mic pre's, without phantom power that I use a lot. They don't have the 2017 chip, but a TA101. Also 4 Dynamites, but really the Valley compressors I use the most are a pair of 440 limiters and a model 601. Those are still really hard to beat, even today.
Of course I re-chipped the GBII and Keypex modules and replaced the TL072s with OPA2604 chips. They still sound and work great. The old Allison modules were converted from neon to LEDs and re-capped. They are used every day and still earn their keep. I bought all this stuff new, when it came out, and never regretted it. I'm glad they may again be produced so others can have these great tools too.

Jim
 
[quote author="barclaycon"]I always felt that the Meyer's were a cheap imitation.[/quote]
Having used meyers for a couple of years, I can assure you that you are SPOT-on!

Keith
 
The led's on these things are crazy sensitive. You breathe on them wrong and they break. 3 of the 7 on mine don't work...and the 6db led...stay's on constantly...does this mean that the one of the transistors that's driving it is blown? How can i test for this?

Thanks,

D.
 
Something I did with a set of four Allison Research Gain-Brain's 100 years ago. Jensen output iron wired 150:600 for step-up gain and isolation.


2627897735_23017b7a77_o.jpg
 
Hi everyone.

I've just written an article on Allison Research.
I thought some of you might be interested:
http://www.oneflightup.com.au/allison-research

I've scanned and uploaded 11 PDF files of original Allison documents: brochures, price sheets, etc!

Hope you find it interesting and useful.

Cheers!

Nick

One Flight Up | Recording Studios Sydney
http://www.oneflightup.com.au/
 
I didn't know that Paul Buff had passed away in Mar of this year... RIP. He was one of the smartest guys I knew in the audio business.... .including when he left audio for greener pastures.  8)

JR
 
Thank you for the link Nick. it is very sad to hear that Mr.Buff has passed.

Do you happen to have any info related to the Valley People model 813 QLZ history?

back in May, I serviced a rack of these and they are very fine Preamps, but I have never come across any real info... (pic attached),
 

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emrr said:
Something I did with a set of four Allison Research Gain-Brain's 100 years ago.  Jensen output iron wired 150:600 for step-up gain and isolation. 


2627897735_23017b7a77_o.jpg
Did you have to do anything to drive the transformer or was it literally from output into the transformer and wired to a balanced connection?
 
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