Tech discussion > 5K Series console

Help - SL555F - Talkback module

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ilcaccillo:
Hello friends,
I have an SL555F talkback module.

Does anyone know if this module has the circuit for the Listen Mic Compressor in it's signal flow?

Do you know where I can get a schematic or documents for it?

Thank you so much
Best regards

iL

Helterbelter:
Hi,

Yes, it has the listen mic compressor circuit (it's actually a FET-limiter). I'm not sure if I still have the schematics....

This is one of the simplest 5k modules. It doesn't need the -25v line either, only +18/0/-18v.
The only control that's included for the limitersection, is an onboard trimpot for the threshold. You can wire this one to a pot if you want to, you'll need a 10klin pot for it.

Oh, and in case you want a line input : set the internal jumper to external mic, and put a U-pad attenuator in front of the input (which is connected to the Jensen transformer).

pascal.verdet:
Hi,
Please find the schematic.
Cheers,
P.

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