EP-3

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Animalbeats
Posts: 20
Joined: Tue Feb 03, 2015 9:21 pm

EP-3

Post by Animalbeats » Mon Mar 22, 2021 12:18 pm

Can someone explain how the EP-3 works...

Is the BK-100k72

a Log or Linear pot?

Does it have an altered taper?

There are 2 100K pots, but is says 50K resistance, is this the equal divide of the 100k pot?

What is the second "scalable output knob" pot for exactly and how does it work?

Help is appreciated.

Gordon

Markyboard
Posts: 323
Joined: Wed Jul 30, 2003 6:46 pm
Location: Springfield, VA

Re: EP-3

Post by Markyboard » Wed Mar 24, 2021 12:01 pm

Hi -

Not sure where you got your info from. Anyway this (left pic) looks reasonable although I cant confirm the accuracy:

Image

It is how most expression pedals with a polarity switch and range knob are configured .

The range knob sets the minimum value of the expression input. With foot pedal in heel-floor position you can set it to give some intermediate value instead of 0

Both pots are linear. Logarithmic (or alter tapered) pots are typically used for volume pedals

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