volume controll in the feedback loop

[jan.didden]

Sam,

Do you have a schematic diagram of the switching thing?

Jan Didden

 

[sam9]

janneman,

This ia all I have:
www.accuphase.com/pdf/p-5000_3.pdf

There is a schematic of sorts but I doubt it has the details you want. In any case, I would think it could be done by simply switching the Lower Arm resistor. The biggest concern would be the physical signal path as that is a potential entry point for noise and cross talk.

 

[jleaman]

link doesn't work.

 

[djk]

SAE used feedback loop gain switching in several of their models.

http://wardsweb.org/audio/docs/MK 24 2400 schematic1.jpg

Not the best scan, but readable.

Note that the lower arm resistor is 1K8 with the switched values in parallel with this, if the switch fails it goes to a low gain state.

 

[dhaen]

link doesn't work.

Try this:


http://www.accuphase.com/pdf/p-5000_e.pdf