Boss FV50H - changing volume sweep

[andyg_prs]

Hi,

I've been trying loads of different volume controllers over time for my master volume live. I put the pedal in the loop and use it to tweak my volume in the mix. I got the Visual Volume 10 pedal which is great with the LEDs....but even adjusting internally, the friction on the pedal isn't enough and it's just a bit too jittery for fine control with my size 12s. It's also a big pedal.

I use an EV-5 as an expression pedal, and I prefer the movement of that pedal so decided to get an FV50. I ended up with a second hand FV50H. Now the issue with it is, in the loop or in front of the amp, and wherever the minimum volume is set, the majority of the increase in volume seems to only happen in the last inch of movement.

Firstly, I'm pretty sure that's just the characteristic of the pedal, I don't imagine it's faulty, right?

So, I'm considering whether I could use some resistor and/or capacitor mod in order to change the sweep. I don't have a lot of experience so I don't want to be experimenting blind.

From youtube I got this schematic. Inside the actual pedal I can see that the minimum volume pot is 500k so I assume the pot on the pedal is 250k (I can't quite see).



Any ideas what I would need to do to make the volume change more progressive across the entire sweep of the pot?

Thanks,
Andy

 

[Artie]

I would try replacing the "main" pot with a linear. There's a way to mimic a log pot if you start with a linear, but difficult, (if not impossible), to do the opposite.

Edit: Take that with a BIG grain 'o salt, or just ignore. I just looked inside my FV500 and it uses a strange dual pot. One wafer is 250k log, and the other is 10k. Not sure what your FV50 has inside.

 

[dystrust]

The issue is that the OP is using a high impedance pedal on a low impedance signal. I'm not 100% sure how they differ electronically, but a FV-50L (L for low impedance) will probably do what they want.

 

[devastone]

If you are putting it in the loop you should be using the FV50L, 250K/500K is too high of an impedance to put in the loop. The H is made for being the first ting in your chain before any buffers.