Dunlop - 105Q Bass Wah

Nikifena · Post by **Nikifena** » 05 Jul 2008, 07:45

Hi, I search a bass wah schematics.
I know about 68nF cap change, but the final effect is not good as I hear 105q model of crybabe

Here is a short sample of 105Q
http://media.putfile.com/105Q

Thanks

Solidhex · Post by **Solidhex** » 07 Jul 2008, 02:27

I'm pretty sure there is some sort of clean blend at work in the 105q.

--Brad

Gila_Crisis · Post by **Gila_Crisis** » 09 Jul 2008, 12:57

try also using an higher value for the 1k5 resistor, i think this help a lot to brighten a bit the sound with such big sweep caps

Bernardduur · Post by **Bernardduur** » 09 Jul 2008, 13:00

The 105Q is a completely different wah; no inductor!

I once had a small peak inside one; lots of big IC's. Shame was that I had no time to trace it!

Dirk_Hendrik · Post by **Dirk_Hendrik** » 09 Jul 2008, 19:52

Bernardduur wrote:. Shame was that I had no time to trace it!

I had that problem with a Maxon Ad9999.....

Nikifena · Post by **Nikifena** » 11 Jul 2008, 13:01

Bernardduur, thanks.
Do you have a picture inside ?

Bernardduur · Post by **Bernardduur** » 11 Jul 2008, 13:51

Nikifena wrote:Bernardduur, thanks.
Do you have a picture inside ?

Nope ........ should have

himister · Post by **himister** » 16 Aug 2009, 14:28

One more interested in the schematic for the 105Q.
Really like the sound of the guitar through this (bass) wah.

doomrock · Post by **doomrock** » 22 Aug 2009, 21:47

I've got one. I'll try and get some pictures on tomorrow.

Jamie.

himister · Post by **himister** » 24 Nov 2009, 02:55

Bump. Anyone with photos inside ???

chicago_mike · Post by **chicago_mike** » 24 Nov 2009, 03:18

theres two versions..the newer one is all smt. So I think we might want to try to get an older one. I dont know when the change over was though.

mrslunk · Post by **mrslunk** » 25 Nov 2009, 23:07

i own the SMT version, i've had to modify it a bit (repalce a busted pot with 2 fixed resistors is all)
if anyone wants i can upload pictures of

himister · Post by **himister** » 25 Nov 2009, 23:22

Sure. Do it!

At least will see what's inside in details. Thanks

mrslunk · Post by **mrslunk** » 26 Nov 2009, 04:03

ok images are here:http://yfrog.com/0gdscf7016jx

The wah pot is a dunlop hotpot, 20k
the capacitor next to it is a 1uF tant.

Rp1 was a 470kA pot, but it got busted from travelling, and has now been replaced by the 2 through hole resistors you see there.
(as an aside, if anyone knows where to source a 470kA pot that looks exactly like the peak pot below it, let me know)

The peak pot (Rp2) is 100kA
and the trimmers
TP3: 20k
TP1(just below TP3): 5k
TP4:500K

The bottom 2 IC's are 4049
The top 2 IC's are MC33174 quad op-amps

let me know if you need any more pics

himister · Post by **himister** » 26 Nov 2009, 04:15

Thanks mr slunk very much. That was very kind of you.

Let you know if needed more clear shots or just to check values.
I hope other will "jump in" helping trace this fellow's schematic.
Cheers

edit: and we need volunteer to measure that smd shitty caps...

chicago_mike · Post by **chicago_mike** » 26 Nov 2009, 06:22

I can email dunlop with my tech email addy to get a schematic, just pm me the serial #

himister · Post by **himister** » 26 Nov 2009, 06:46

Mikey.... if you pull this off....it would be awesome!

It would be so cool to have a DIY project on this one.

chicago_mike · Post by **chicago_mike** » 30 Nov 2009, 20:36

No go. They want to know whats wrong with it so they can help guide me in repairing it.

Güero 2.0 · Post by **Güero 2.0** » 01 Dec 2009, 10:57

chicago_mike wrote:No go. They want to know whats wrong with it so they can help guide me in repairing it.

Under this condition, just rest to us reverse this babe!

We need more pics. High res pics!

himister · Post by **himister** » 01 Dec 2009, 23:56

What we need is someone who own it and is willing to do the reversing, measure shit

SMT components will be a bitch to do it.