Signal Conditioning Amplifier...used for ??

[Freq Band]

I asked this at DIYaudio, but no one replied, maybe someone here can help...
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Signal Conditioning Amplifier..
I see several of these in various forms at my local elect. surplus store.

Could there be a use for them in audio...live driver, mic pre...??

One in particular is a card-slot/lunchbox stylye . Each of the plugin cards (4) are labeled "Signal Conditioning Amplifiers" , and have level, filter, and callibration controls.
Inside they each have their own transformer/regulated PSU, and consist of VERY high quality parts... many socketed LF411 's, OP07 's , a couple of LT1014, as well as some cMOS chips.

From reading, these kind of amps are generally used for transducer amplification, when measuring vibration and movement.

...but for audio??

(Here it is......)
http://intertechnology.com/Vishay/pdfs/2200.pdf

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[mikep]

maybe as a DI? it has 22M input-Z. or put a high-ratio transformer in front for mic pre use. Probably low noise but I have a hunch it will sound "crispy" how much do they want for it?

 

[dale116dot7]

Probably could use it as a mic preamp, I'd guess. You've got a lot of gain there.

 

[Samuel Groner]

You've got a lot of gain there.

As well as a lot of noise. Not a problem for a DI box, but for a mic pre you'd need at least a 1:5 step-up transformer in front of it. We don't know much about distortion of this amplifier either--at least the ICs you mentioned don't sound very promising with this respect, but who knows. Anyone got a schematic?

Samuel

 

[JohnRoberts]

These (if cheap enough) might provide a nice source of clean power and modular chassis to load with improved circuitry. They will likely provide differential (input) wiring to the outside world (for mono sources) but may not be optimized for full audio bandwidth and meet modern expectations wrt S/N or linearity. It might be worth checking the internal PS rails for + and - supply.

JR

 

[Freq Band]

I think I know what you mean John, but these 4 plugin modules each have their own power supply transformers on each card....no separate PSU plugin board. (There is a picture of these boards in that pdf above.)
Common at this store, are card racks with nice PSU plugins - many video DA 19" rack types.
Boy, there seems to be an endless supply of unwanted analog broadcast stuff around.


Example:
This driver unit will send a wideband composite (FM) signal up to 2 miles over twinax cable .

CLOSE-UP:
http://i5.photobucket.com/albums/y177/Midiot/DSCN2126.jpg

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