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General => Open Discussion => Topic started by: PhiloB on September 25, 2013, 04:50:40 PM

Title: Amp Footswitch LED.
Post by: PhiloB on September 25, 2013, 04:50:40 PM
Stupid question. But how does a passive amp foot switch LED get its power?
Title: Re: Amp Footswitch LED.
Post by: selfdestroyer on September 25, 2013, 05:03:18 PM
With the footswitch I made for a "favorite" button for the Strymon El Cap, it passed voltage on the tip of the 1/4" jack for the footswitch. I bet the amps do the same. Just a guess.

I would say to look at the schematics of your amp to see if voltage leaves the footswitch jack.
Title: Re: Amp Footswitch LED.
Post by: PhiloB on September 26, 2013, 03:32:55 PM
Thanks Selfdestrroyer.  I opened the footswitch last night and no battery.  It is a TRS cable.  It controls Channel selection and boost on/off. 
So, the schematic doesn't indicate that there is voltage but there must be. 
If the voltage doesn't return, then boost is off.  Is that how it functions?
Title: Re: Amp Footswitch LED.
Post by: gtr2 on September 26, 2013, 07:15:29 PM
What amp?

Most run low voltage and the switch and led complete the circuit that flops a relay.
Title: Re: Amp Footswitch LED.
Post by: PhiloB on September 27, 2013, 12:16:54 AM
Just got an Ampeg GVT 52-112
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