Dolby A301 Noise Reduction Unit

[daArry]

Hi...

I've just picked up an old (1966?) 2 chan version of one of these which came out of Air studios orignally - looked useful for parts n metalwork if nothing else...

As pictued above (but with 2 lil meters on the main module and big box attached to the back) It's a 6U beasty with 8 plugable modules (4x compressor, 2x amplifier and 2x control) and a big main psu section (also plugable). Are there any creative ideas to make use of these modules? Or would it be sacrilegious to mess about with it at all...?

Cheers!

 

[SSLtech]

We had one of those, it came with the legendary 6 Neumann U67s, a tube 2-track, 2 tube mixers and a load of other kit that we paid £800 for back in 1987...

Ours was serial number 007. It was known as the "S/N stretcher" and is basically the early Dolby 'A' series noise reduction.

You can use it as-is for the legendary "breathy" vocal trick by just putting it in encode and leaving it there. -Or you can decode old A-type encoded material.

I'd leave it alone but then I'm a sentimentalist.

Keith

 

[daArry]

Hey Keith,

Damn, that was quite a score u got there! the bond edition to eh serial on this one is 1084...

That vocal app sounds interesting will give it a shot :thumb:

I'd leave it alone but then I'm a sentimentalist.

Fairplay - will leave it to mature some more then

Cheers.

 

[punk]

does anyone have the manual/schematic for this?

i just got one. i've emailed dolby twice now but haven't got a response.

thanks,

byron

 

[Michael Tibes]

[quote author="punk"]does anyone have the manual/schematic for this?

i just got one. i've emailed dolby twice now but haven't got a response.

thanks,

byron[/quote]

I have one of these stored for quite a while and would also be very interested in a schemo.

Michael

 

[Hansolo]

[quote author="punk"]does anyone have the manual/schematic for this?

i just got one. i've emailed dolby twice now but haven't got a response.

thanks,

byron

I have one of these stored for quite a while and would also be very interested in a schemo.

Michael
[/QUOTE]

An eBay seller Studio.Electronics sells copies of the manual schematic for $35 And there is a really cool young Electrical Engineer in Brooklyn that makes the hard to find Alignment Extender Cat no. 6B to calibrate the unit. The name is Tubular Audio on Reverb

 

[living sounds]

I have one of these stored for quite a while and would also be very interested in a schemo.

Michael

An eBay seller Studio.Electronics sells copies of the manual schematic for $35 And there is a really cool young Electrical Engineer in Brooklyn that makes the hard to find Alignment Extender Cat no. 6B to calibrate the unit. The name is Tubular Audio on Reverb
[/QUOTE]

https://groupdiy.com/threads/dolby-a301-extender-card-remake.81449/#post-1081141

 

[MarkHorn]

Dolby A301 schematics

 

[user 137017]

yhos os a thread from the sone age

 

[user 137017]

this thread is from the stone age. is it still relevant