Roland AW 10

[Mikkel]

Hi.

I've recently got hold on this wah-pedal. A friends friend gave it to me,
as it is well known in my neighbourhood that I live in a cemetary of
abandoned guitar.. -stuff.
It's an ordinary rocking pedal, and it says Roland Wah Beat on it, and I think it looks rather promising. Perhaps some sort of AutoWah or something.
A sticker on the baseplate says something about a stereo organ connector cable, but there is both input and output jacks on it.

Does anybody know anything about this pedal, and how it should be
connected? (Inside, I should think as I believe this poor thing has
been 'customised' for organ by some vandal).

I hope someone can, and can be bothered to help.

Thanks,
Mikkel

[RickL]

In its stock form it is simply a wah pedal, similar to a crybaby. If it's been modded it could be anything.

I have one and I could help with returning it to stock if the original circuit board is still there.

[Mikkel]

It looks very clean and original inside.
Except for the wiring..

So please help.

thanks.

[RickL]

Okay, here goes. This will have to be in words, I have no way of posting a picture.

Wah on it's back, switch and pot at the top, pot shaft facing left.

DPDT switch:
123
456

1 and 4 connected.

3 - yellow wire to underside of circuit board, connects to the 47k resistor on the top right of the board.

2 - yellow wire to tip of input jack

(edited - I had 2 and 3 reversed on the first post)

5 - blue wire to tip of output jack

6 - blue wire to top lug of pot, which also continues on to underside of circuit board, connects to one of two 0.22uF caps on the top of the board, the rightmost one.

pot

top lug described above

middle lug - green wire to underside of circuit board, connects to leftmost of the two 0.22uF caps on the top of the board.

bottom lug - black wires to sleeves of input and output jacks, also continues on to a pad on the top of the circuit board, immediately below the screw on the right side.

sleeve of input jack to - (black) wire of battery clip

+ (red) wire of battery clip to a pad on the circuit board, on the top left, immediately above the 1k resistor.

Hope this helps.

[sir_modulus]

Are there any inductors on board?

That seems to be an odd switching setup. If 5 and 6 were reversed, it would be the EZ DPDT true bypass.

Can you give more info as to what is on the board?

Cheers,

Nish

[RickL]

It's got an inductor a couple of transistors and some caps and resistors. The two 0.22uF caps are the same value, in the same place as a Crybaby.

Without tracing out the circuit I would bet that it is the same circuit as a Crybaby with maybe a couple of slightly different component values.

Oops! 2 and 3 are reversed. 2 goes to the tip of the input jack, 3 goes to the board.

Also, FWIW the jacks are on the opposite sides of the pedal from the norm. Input jack on the left, output jack on the right. A lot of old wahs seem to have this arrangement.

[Mikkel]

Thanks a lot!
I'll get soldering right away.

Cheers

[Mikkel]

Thanks a bunch.
I wired the thing as RickL suggested, and it worked!
So I brought it along for a gig last night, to see what it would do.

So far so good, but the "wah" wasn't very articulate, it only travelled
a very little when the pedal was pressed all down. When I rocked it
back some weird feedback occured. A little Whammy'ish as this
feedback started deep, and then went up. Almost to pitch with an
octave above the played note. I thought WOW, kind of cool!

But why, oh why does it do what it does? It didn't reveal these
"analog whammy" qualities when I tried it at a quiet level at home,
here I only heard a wah-pedal with a less than long sweep.
(The sort that starts very treble, then suddenly breaks and is mostly  bass).
It was only at substantial volume (through a Bluesbreaker) that it
got positively weird.

So: Anybody heard of an analog whammy?  

Cheers