Pot shunting

[Smeggy]

on my se version the two grounds got to the two board ground connectors like they would if wired normally. A balanced pot though, dunno but I would have thought the wiring would have been the same doubled up but I've never looked at the connectors of one. I just assumed it would be the same as se with two sets of connector tags.

[n_maher]

Gary,

you could do a shunted pot exactly like the se version but it would take a 4 gang pot. The idea here is to use an se pot for balanced thereby saving a ton a cash.

[Smeggy]

Ah, I see. Sorry, wasn't paying attention

In that case I'm all over it as I'll be balancing my EHHA soon.

[nikongod]

Are you using both channels (+/-) on the same board? IE left and right amps.

Do you have the input caps in?

I would ask tangent in a bit

[Smeggy]

After this I'm going to be shunting the mini pot on the CTH, that should give a vast improvement.

I may go dual pot on the EHHA as some of my phones have balance issues so that should help.

[dBel84]

now you need to start investigating the arena of OTT resistors for shunting ..dB

[n_maher]

Are you using both channels (+/-) on the same board? IE left and right amps.

Yes, I'm using both channels on the same board - one for L and one for R. The + connects to IR and the - to IL, the ground channel is not populated on either board (shouldn't make a difference that I can see). The power supply is a single TREAD feeding both boards and I've checked the voltages at the various pins of both the OPAL/R and BUFL and BUFR positions and all seems well there.

Do you have the input caps in?

Nope and I checked continuity across the pads to make the sure that the traces had not been cut.

I would ask tangent in a bit

I think I'm going to try jumping the pot out of the equation entirely and see what happens then. I have a source that can do digital attenuation so I shouldn't blow my fool head off. I would appreciate any suggestions for how to wire the input ground though (pin 1 on the XLRs), it's still unclear to me what the right connection here would be.

[fierce_freak]

Would this work the way I think it would (allow proper volume control for switched rca and xlr inputs)?

[nikongod]

Would this work the way I think it would (allow proper volume control for switched rca and xlr inputs)?

That is how I run the inputs on my balanced OTL monster (the silver ghost). It works great for switching RCA & XLR with a differential pair input stage.

[fierce_freak]

Awesome, thanks for the reply

[luvdunhill]

a differential pair input stage.

yeah, that's probably the key part though.

[fierce_freak]

Argh, I thought I'd seen people using the balanced shunt pot scheme with amps other than those with a differential pair input. Can anyone tell me whether or not the schematic I posted would work with the eXStata?

[Pars]

I for one do not see how this could work fro a volume control... it looks like it just acts as a variable resistor between the two "channels", even if those are the same signal 180 degrees out of phase? I could also just be dense

[Voltron]

Two pages into a thread entitled "Pot Shunting" and nobody has made a Dom joke?

"Screw you guys, I am outta here!"

[dsavitsk]

I for one do not see how this could work fro a volume control... it looks like it just acts as a variable resistor between the two "channels", even if those are the same signal 180 degrees out of phase? I could also just be dense

I think you listened to an amp of mine using this sort of pot at the Chicago meet, if that helps you believe that it works.

[Les_Garten]

Nate,

since this thread got bumped. Did you get the two deck pot to work as a Balanced shunt vol control? You never updated whether you ironed it out or not.