ORTF / Schlumberger (?) console H/LPF filter - any information AT ALL??

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adamasnan

Well-known member
Joined
Sep 24, 2018
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134
Hi all - I am talking to a seller that has some of these ORTF/Schlumberger filters, but has no info at all. Can anyone help? Schematics would be INCREDIBLE but at anything at all would be great!

Thanks!!
 

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Hello

PCB don't seem that complicated to reveres engineer if you don't find schemo.
Regarding the number of (quad? ) opamp I guess a four pole stereo.
Be aware that maybe the unit is not line level or balanced as it probably sit in a desk (internal level ?)

Best
Zam
 
OK thanks! I assume it's unbalanced tbh, but can only hope it's line level.

I am just trying to ascertain how to rack them if I do get them, I am more familiar with German broadcast cassettes, which are mostly autonomous with a single power supply, these look like they might need different voltages at once via the multipin? Sorry, I am really only good at wiring cables!
 
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