convert morley wah into volume pedal?

Average-Joe · 2013-06-30T16:26:44+00:00

Hi all. I have an old Morley wah pedal. I never use it - and I can barely get R500 for it. Is it a big deal to convert it into a volume pedal? Now that would be useful. Who could do it? And what would it cost? Or could i - with an unwieldy soldering iron - do it myself? Thanks for and feeddback?

Average-Joe

Is it worth couriering the intestines up to you?

I like your plan.

Do you reckon a hacker like me can manage it alone?

MikeM

The parts inside are worth R25 or so.

Average-Joe

Not sure i'm that badly in need of karma points.
I'll store them so long... Drop them off next time I play Sun City

Chocklit_Thunda

MikeM wrote CT, link to EB's mechanism?

Don't have a link.... I actually found it out by looking at my earnie ball wah. I was wondering how to get the full range of the pot and then happened to remember I had a the EB and took a look at the innards. It's a string attached to the back of the foot pedal, running to a small dual wheel (small then big) then out to the potentiometer and then up to the front of the pedal. I think I'll have to draw it out and show you coz it's hard to explain but yeah it should work. I've always read about the EB wags having an extended range and sweep and I figure this is how they got it

Chocklit_Thunda

Also

http://www.morleypedals.com/xvoes.pdf

Found this a while ago and forgot to link it

Average-Joe

Thanks!

A diagram I can read ?

I reckon I'll take a scalpel to her.

I can picture what you mean with the double wheel string Macgyver.
Not sure where I get the hardware though...
Scared it'll look like a boy scout constructed it with Macano.

A picture would be good.
And any tips.

Average-Joe

I guess it should be easy for me to leave in the bypass switch.

Is it a big deal to set it so that it attenuates as you pull back from middle.
And amplifies from middle forward?

And will it be an advantage / big deal to make it buffered.
Not sure what "buffered" even means..... what is the function / advantage?

It does have the active 9V parts in already after all.
I reckon that could potentially be a very funcky toy.

And any suggestions for utilizing the old volume knob?

Chocklit_Thunda

Well the wheel is a small one stuck onto a big one. The cable loops in from under the small one, goes through a small hole and into the big one and loops that one and out to the pot. I'll try and get pics of what I mean.
Buffering is just a simple circuit put in place instead of true bypass to keep the signal level constant and matching when the pedal is not true bypass. If this wasn't on place, the pedal would load the output signal which would affect tone.

If you have another buffered pedal in line your signal should be fine with the schematic I found for the passive pedal.

Basically you'd just have to rip out the guys of the pedal, mount a pot in there and have fun

MikeM

I believe it's actually a wheel and a cam btw.

Average-Joe

Sorry - I'm almost totally ignorant....
Not sure what a true bypass is...
I'd guess it means a switch shortcutting the circuit
As opposed to just turning the pot to max?

Does my pedal then not have a true bypass already that I can just leave in?
And would there then be any use for a buffer?

Josh-Hayes

I reckon you should be weary with this. Morley pedals run optically, so you can't just convert it like you could a Crybaby or something similar.

If you are interested in building a volume pedal from scratch have a look at this: http://www.toontrack.com/forum/tm.aspx?m=35302

Average-Joe

Can a person get such parts?
Or must I use paperclips, prestick and rubber bands?

Average-Joe

Thanks Josh

I'm trying to utilize as much as the pedal hardware as possible.
The optical gadgets and circuitry we've decided are history.
So in that sense I am almost builing from scratch.

Heath

http://www.morleypedals.com/pwv-iies.pdf

why not do a a Morley switch able wah / volume pedal might be able to salvage a lot of the case

Average-Joe

We thought about that briefly....

But the boffins reckon the wah circuit is primitive - and wouldn't bother (see discussion above somewhere).

I'm also not keen to dabble with more of those LED thingys.
A circuit I may be able to solder an extra pot....
But aiming lasers and welding attachments is for the rocket scientists ???

Chocklit_Thunda

MikeM wrote I believe it's actually a wheel and a cam btw.

Hehe I don't speak engineer... I'm just the architect ?

MikeM

Chocklit_Thunda wroteHehe I don't speak engineer... I'm just the architect ?

Then don't let anyone know you don't know what a cam is. :?

Average-Joe

After few distractions....
Can anyone answer these questions:

1. Is it a big deal to set it so that it attenuates as you pull back from middle.
And amplifies from middle forward?

2. Does my pedal then not have a true bypass already that I can just leave in?
And would there then be any use for a buffer?

3. Where do I get / how do I manufacture the cam mechanism?

4. And for bonus points - any suggestions for utilizing the old volume knob?

Chocklit_Thunda

2. If your pedal has a stomp switch it may have a true bypass in place. If not and its just the usual Morley style were you operate the foot treadle to turn it on then it's not true bypass.
4. Take out the volume pot, mount it sideways and viola ?

As for the cam you could get two pulley wheels and stick em onto each other.

Average-Joe

Thanks Thunda

2. It has a bypass stomp switch. Nice and solid like the entire chasis.
Morley gets that right... Built like a tank.
Does that mean i need not worry about buffering, and the circuit can be passive?

4. Eureka!

I am about to scrub up.
Will keep you posted.

Any clues where I find such little pulley wheels?

And that EB mechanism picture would be really useful.

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