Adding a Slave In/Poweramp In on a tube amp.... At the Master Volume wiper?

[candletears7]

Is it pretty much standard practice to be able to add a Slave In/Poweramp In to any amp at the Master Volume pot wiper?
Let's say I'm taking the Preamp Out/Send of an amp and feeding into another amp, would this be a pretty standard spot to make the connection?
Amp Sends are usually at Line Level are they not, so I'm thinking that a decoupling resistor wouldn't be needed - just make the connections between hot and ground? Any noise issues foreseeable?

I've identified on a Marshall 2204 schematic below where the possible Slave In connection could be made (the small red circle - any potential issues here?

Cheers!

[sluckey]

That's a very logical place to put the jacks.

     http://sluckeyamps.com/november/november.pdf

[d95err]

I would put it between the treble and mv controls (where you would normally put the fx loop). You will most likely be able to control the volume of whatever you plug in.

Preamp out from an amp can be anything from a low ”pedal level” signal to a huge preamp level signal.