Work around for broken Pad on 70s Crybaby board

General rules and hints to succesfuly bring back that old pedal to life
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Fuzzonaut
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Post by Fuzzonaut »

Not sure if this is in the right section. New member here. I’ve been buying up broken 70s Crybaby and King Vox Wahs lately for dirt cheap. Fixing them up since it’s usually just a faulty switch or pot.

Yesterday I was trying to fix one that I picked up for and when going through it to find the issue it turns out the trace pad underneath on the “Q” 33k resistor had broken off. The value of that resistor had been changed from stock so it probably got burned off from someone trying to mod it.

Am I correct in thinking I can just bypass that point and solder it directly to the next point?

If this is a valid work around do I need to remove the rest of the conductive trace underneath when soldering to the next pad/component?

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plush
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Post by plush »

Hi,

Post pics.

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Yazoo55
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Post by Yazoo55 »

If it is possible, just scrape off any coating and solder the resistor leg to the copper trace which led to the missing pad.

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Fuzzonaut
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Post by Fuzzonaut »

Thanks for the above tip. I scraped off the solder and made sure nothing was contacting the copper then I jumped the broken pad to the next trace point with an uncut leg off a same value resistor and soldered it in and all is working well.

Pleasantly surprised by this wah I picked it up for $45. It’s a mid 70s Thomas Organ with the 03 stack of dimes inductor. Pot was shot so I put a chasetone ICAR taper pot in it, true bypassed it, dropped the input resistor down to 56k from the stock 68k just to fix the volume drop from true bypassing it and had to replace the battery snap. Usually I bump the resistor that runs parallel with the inductor up a bit (38k-100k depending on what the inductor measures and then fine tune the value of resistor by ear) but on this one a stock value 33k resistor sounds killer.

Didn’t feel the need to mess with any of the other resistors or caps like I usually do. This one measured mostly close to spec and the little bit of drift on a couple of the resistors and seemed to work out well for it. Caps also aren’t leaking shockingly. Runs really quiet too.

Never had one of the stack of dimes versions. I have a clean King Vox TDK and an early 70s JEN with white Fasel to compare to not to mention a couple boutique clones of the 60s Wahs…this Stack of Dimes one might be my favorite. Don’t sleep on the 70s USA Wahs.

With a little fine tuning, resistor changing and in my opinion/personal preference, a 100k ICAR style repro pot the 70s Thomas Organs can sound fantastic.

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