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johnguitar 6th February 2013 09:42 PM

FX loop volume control

I have a Guitar Tube amplifier with an FX send-return loop. I would like
to create a passive (or active) volume control (attenuator) to insert it in that FX loop to control the volume of the amp (like master volume).
Should it be be line-level? (in general FX loops work at line level or is it irrelevant and is different from amp to amp?)
A 10K potentiometer should be fine or will I have problems with the impedances?

Any response will be appreciated.
Thanks in advance

jjman 7th February 2013 01:41 AM

Depends on the output impedance of the "send" but a simple 100k may work.

kevinkr 7th February 2013 02:18 AM

:cop: Moving thread to Instruments & Amplifiers which is the correct place for this discussion. Please look at forum sub-headers before starting a new thread to determine whether or not you are posting to the correct forum. :D

Tesla88 7th February 2013 11:13 AM

Try different pots value if you go passive , try a 10K and a 100K , then chose the one operating more linear on control...

Enzo 7th February 2013 08:00 PM

Yes, a simple pot wired as a "volume control" can be stuck in the FX loop as a master sort of control. I have a 250k in a small metal box with in and out jacks, and a pot thusly wired as a handy level adjuster for around the shop. It works fine for this.

Send wired to top leg of pot, ground/gommon wired to bottom leg of pot, and wiper of pot wired to return.

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