Hello all, I recently uninstalled some altec and rca gear from an old movie theater. An Altec A150C four channel preamp by the looks of it with it's accompanying 531B psu. (Sadly the power amps were long gone) 
Also took out the altec audio switching system for changing projectors And two large volume control/input selector boxes made by rca, it seems, that are joined by 2 metal rods so that turing a control one one box changes the other accordingly.
The "master fader" has a very nice stepped attenuator made by "The Daven Company" model RL 140-1 as well as a nice rotary selector switch.
Just wondering if anyone has info/ schematics on any of this? Thinking about putting some of it on ebay. Thanks!
Also took out the altec audio switching system for changing projectors And two large volume control/input selector boxes made by rca, it seems, that are joined by 2 metal rods so that turing a control one one box changes the other accordingly.
The "master fader" has a very nice stepped attenuator made by "The Daven Company" model RL 140-1 as well as a nice rotary selector switch.
Just wondering if anyone has info/ schematics on any of this? Thinking about putting some of it on ebay. Thanks!
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