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FDP Forum / Performer's Corner / When a tuner pedal is in 'bypass' mode..


Robbinsville, NJ

what do you mean the bass is too loud?
Jun 5th, 2016 09:54 AM   Edit   Profile   Print Topic   Search Topic

does anyone know if it still draws battery current?

IF I'm plugged in for a 3 hour church gig,
and there's a lot of down time, I click my
pedal ( DigiTech HT-2 ) to 'Tune' mode, which shuts off audio to the amp.

I wonder if I can get better battery life
if I leave in 'Bypass' mode, and turn down
volume on my ax?

Any guesses? and would this vary from
tuner to tuner?

oldFartBassPlayer Walt

Contributing Member

Eat. Sleep. Guitar.

Jun 5th, 2016 12:31 PM   Edit   Profile   Print Topic   Search Topic

It depends on the circuit.

You can test it with a meter to see if it draws battery power in bypass mode by doing a series power check. You have a DMM? Easy to do:

Set the pedal to bypass mode.

Important: make sure you have an instrument plug in the signal input, because many pedals activate the battery via the input jack.

Set the meter to read DC voltage.

Plug the battery's negative terminal into the pedal's battery clip. Leave the positive connection open.

Now hold the DMM's positive probe on the battery's positive terminal, and the negative probe on the pedal's negative terminal.

If the meter displays any voltage, that means the pedal draws from the battery in bypass mode.

(This message was last edited by Peegoo at 02:32 PM, Jun 5th, 2016)

Contributing Member

It's not just good..

...it's good enough.
Jun 6th, 2016 07:51 AM   Edit   Profile   Print Topic   Search Topic

If the tuner is ON, you'll be drawing more power than when it's OFF/Bypassed. The lights being on versus off will tell you that much. So turning the tuner OFF will definitely save you some battery life. Hard to tell how much, though.
Most pedal manufacturers tell you that you'll drain your battery if you leave something plugged into the input jack, so that says there must be some level of current draw even when they're off.

And I would also imagine that it would vary from tuner to tuner, depending on the circuit.

Of course, Peegoo's method is the best way to tell for sure with your own tuner.

Contributing Member

So. Cal. USA

Jun 6th, 2016 09:39 AM   Edit   Profile   Print Topic   Search Topic

Yeah you can measure it as Peegoo explains or just take the battery out and see if signal passes through the pedal with it off. I doubt if it will.

Just unplug your cord from the pedals input half way. That will shut things down during your down time and save your battery. The input jack is the on/off switch.


Robbinsville, NJ

what do you mean the bass is too loud?
Jun 6th, 2016 01:35 PM   Edit   Profile   Print Topic   Search Topic

DigiTech support confirmed what you all said-
I "will definitely get more battery life with the tuner in BYPASS."

FDP Forum / Performer's Corner / When a tuner pedal is in 'bypass' mode..

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