Valley People Transamp substitute or new old stock

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Hello everone

I am trying to replace some Valley People Transamps in some Auditronics cards from a 532 console.

They appear to be blown and are just hissing and noisy. Does anyone have any that work or know of a good substitute?

Thanks

Eric Fritsch

[Scott Dorsey]

> wrote:
>Hello everone
>
>I am trying to replace some Valley People Transamps in some Auditronics cards from a 532 console.
>
>They appear to be blown and are just hissing and noisy. Does anyone have any that work or know of a good substitute?

You will occasionally find these on Ebay, or sometimes the retrofit MCI
boards that used them.

Somewhere around here I have a rough schematic of what's inside, but it's
really just a conventional instrumentation amp design with lots of gain
on the front end. They actually sound pretty decent, and back in the
eighties they seemed amazingly quiet.

If I had a console with a bunch of bad ones, I'd probably just use THAT 1512
chips in place of them as a first cut. The 1512 should come close to it in
noise floor. It will sound different but I'm not saying it'll sound worse,
and you can just make up a little piece of perfboard with a 1512 and some
decoupling caps and put it in place of the transamp.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."