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Old 05-20-2006, 12:49 PM   #21
Dave_Mc
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awesome, man. I'm keeping a close eye on this, since I have a crybaby.

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Old 05-20-2006, 01:50 PM   #22
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I can't say how much a new inductor will change things...I've heard its a pretty sublte difference.


And thanks dave.
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Old 05-20-2006, 01:56 PM   #23
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Originally Posted by That_Pink_Queen
I can't say how much a new inductor will change things...I've heard its a pretty sublte difference.


And thanks dave.


To whatl I've heard its a huge difference. Espescially if you're comparing say, one of the halo replicas to the regular black one thats in the GCB95 crybaby.
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Old 05-20-2006, 02:03 PM   #24
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Haha, I've heard the opposite. I guess someone will have to try one eh?
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Old 05-20-2006, 02:06 PM   #25
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when you gonna get some sound clips of this beast up?
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Old 05-20-2006, 02:08 PM   #26
StuC
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The halo replica is only 20, and if fixes the tone up I may consider installing it
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Old 05-20-2006, 04:57 PM   #27
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Quote:
Originally Posted by seljer
To whatl I've heard its a huge difference. Espescially if you're comparing say, one of the halo replicas to the regular black one thats in the GCB95 crybaby.


dunno about the different models, but i know lewis said that changing the inductor was one of the things that you wanted to do, because the stock one was one of the things that made the stock one suck so much...

Hearsay, granted.

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Old 05-20-2006, 05:02 PM   #28
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awesome, man. I'm keeping a close eye on this, since I have a crybaby.



that you havent touched since it was bought
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Old 05-20-2006, 05:14 PM   #29
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^ sure i have. I just haven't modded it.
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Old 05-20-2006, 05:16 PM   #30
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sorry, i meant your soldering iron i lost half of what i was supposed to say
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Old 05-20-2006, 05:25 PM   #31
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true.
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Old 05-20-2006, 05:34 PM   #32
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get online..now!!
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Old 05-20-2006, 08:16 PM   #33
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ok so modding wahs i know nothing about, anyway to make my bass crybaby a guitar crybaby with a lil bit more gain then a normal wah, a smooth sweep, and make it well to be honest funky, and of corse clear
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Old 05-20-2006, 08:23 PM   #34
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Originally Posted by t heff
ok so modding wahs i know nothing about, anyway to make my bass crybaby a guitar crybaby with a lil bit more gain then a normal wah, a smooth sweep, and make it well to be honest funky, and of corse clear


Find the 0.068uF (68nF) capacitor and change it up to 0.01uF to shift it from bass to guitar frequencies (and the opposite to turn a guitar wah into a bass wah)
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Old 05-25-2006, 12:22 PM   #35
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Woah, gotta keep this thread alive!

How should I mod my 15yr old GCB-95 to get that Jerry Cantrell Wah-Sound?
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Old 05-25-2006, 03:29 PM   #36
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You keep busy don't you?

I might look into this.
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Old 05-25-2006, 07:19 PM   #37
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has anyone disected a dunlop 95Q? i was looking for a parts list to do the touch sensitive true bypass rather than clicking the toe down or can anyone suggest so parts carried by radioshack to do this mod or something close to it
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Old 05-25-2006, 07:37 PM   #38
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I have no clue how to do the touch sensitive thing...but I doubt Radioshack would have the stuff. And I think the 95Q is an opamp based wah, which means many of these mods won't be as directly transferrable.
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Old 05-25-2006, 08:30 PM   #39
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lets say that person x, who will remain nameless, had a stock gcb-95 and access to parts. would person x be able to rig the wah (with a 3pdt switch) to switch between wah and volume pedal? would the volume pedal taint the tone in any way? would it be quieter or would it be capable of boosting the signal? is there a schematic available for this somewhere or a more indepth one stating what each part of the huge mod at the beginning of this thread does? person x is hesitant to go solder crazy without knowing what all these things would do.
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Old 05-25-2006, 08:35 PM   #40
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Q1 and Q2 were originally an MPSA-18. IMO, it sounded a bit sterile and clean, so I put a germanium transistor. The germanium flavors the tone a bit and makes the pedal warmer. Q2 was replaced with a 2n3904 silicon transistor, which I thought sounded better. The transistor in the second position is just a little buffer, and it's not too important as long as the gain is over 175 or so. Both the transistor changes aren't super important, it just gave it a nice touch I thought. If there's part of the mod to skip, it's this one.

The changing of the 68k resistor to a 39k resistor, and the change from a 390 to a 330ohm resistor was prompted by the removal of the buffer. The buffer apparently adds a small boost to the overall gain, and so when I took it out, the volume of the pedal dropped a bit. Lowering the 390ohm resistor feeds more current into Q1, boosting the gain. The changing of the 68k resistor to a 39k resistor is the input of signal, this was also lowered to let more signal in.

Changing the 1.5k resistor controls the middle frequencies of the circuit, and IMO, the abruptness of the sweep. The 2.2 replacement I used seems to work fine here, it's a bit smoother, and definitely warmer and less "scooped" sounding. I really recommend this mod.

There is a 33k resistor paralleling the inductor in the stock Crybaby. I looked at the old Clyde McCoy wah schematic, and noticed a 100k resistor here, so I decided to throw in a 100k pot to be able to tweak this as much as I wanted. IMO the pot is a bit excessive, I usually leave it at around full anyways. Sometimes with really heavy distortion though, I think it sounds better with the resistance ~50k.

And now for that volume pedal mod---this one is awesome! It's really easy, just make a toggle to disconnect one leg of the 4.7uF capacitor. This takes all the sweep out, and just leaves you with a nice volume pedal. The coolest part is that it leaves a bit of a boost, and then allows you to sweep through unity gain, and then down to nice and quiet when you press down the heel. You can't mute it all the way, but it's a really good mod. I ended up relocating the 4.7uF capacitor on a little piece of perfboard, just to make things easy. It will work as long as the right connections are made/broken though. One thing is that it seems to bleed off a bit of treble. IMO this isn't really worth fixing, it's a minor issue IMO.

The last really important mod here is the .01uF to .022uF mod. This controls the sweep range of the wah. I read that the Jimi Hendrix signature wah had a .022uF cap in here, so I went ahead and tried it. It helped significantly, really fattened things up. If you want a lower sweep, go ahead and make this value higher, or vice versa.
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Last edited by That_Pink_Queen : 05-25-2006 at 08:57 PM.
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