Newby Build ABC Pedal

Started by okies, February 28, 2013, 10:07:45 PM

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okies

Hi guys, Im new here and new to pedal building, I'm just trying to put together an ABC pedal, Im going to use it to switch between my Silverface Princeton Reverb and 3 different speaker cabinets. Im having some problems (bout to pull my hair out) and was hoping someone would take a look at the pics and schematic im using to see if you can spot the problem. At this point Im getting nothing, I have tested the led, so I know they are good, as is the battery. Thanks in advance for any help.





Steve

PRR

Just looking at the first wire, from IN jack to switch:

You have wired the switch wrong: turned 90 degrees.



See which way the lugs go? On a 9-pin switch, that is the only way to know which way the poles go.

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okies

Thank you very much, I rewired the switches and am now getting all 3 positions to work, however, the pedal has no "off" position? It should shut completely off with some combination of switching, shouldnt it?


PRR

> the pedal has no "off" position?

Correct, no OFF position.
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okies

Thanks, I'll just wire a mini switch in to the battery leads, just to preserve battery life.

By the way, I really appreciate the help, this is a great forum, maybe I will learn enough to be able to contribute knowledge at some point.

PRR

> I'll just wire a mini switch in to the battery leads, just to preserve battery life.

Yes; or study the often-used method of using the extra finger on a "stereo" jack to un-ground the battery; or snip the "A" LED (if it is not in "B" or "C" it must be in "A" mode) and always put-away in the "A" (all off) position.

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tombaker

Thanks for putting up this thread.
I looked all over the net for an ABC wiring guide and all I could turn up was the Morley ABC schematic. I fit mine into a smaller case, it was a tight fit and the wiring is a little messy but it works like a treat.

Blue Box, Harmonic Perculator, Brian May Treble Boost, Klon Vero, Fuzz Face Germ/Sili, Echo Base Delay, CS-3 Monte Allums Mod, JLM 1290 Mic Pres, JLM Mono Mic Pres, Engineer's Thumb, A/B/C & A/B boxes, Tiny Giant Amp, Microamp

tombaker

#7
Blue Box, Harmonic Perculator, Brian May Treble Boost, Klon Vero, Fuzz Face Germ/Sili, Echo Base Delay, CS-3 Monte Allums Mod, JLM 1290 Mic Pres, JLM Mono Mic Pres, Engineer's Thumb, A/B/C & A/B boxes, Tiny Giant Amp, Microamp