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Small Stone Issue H/J Mod for True Bypass, LED

Started by ddavis20341, February 17, 2018, 06:21:06 PM

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ddavis20341

I've been trying to revamp a vintage small stone I had lying around to get it to work better on a pedalboard and in a live context. Basically, I'm just trying to make it true bypass with an LED and Boss-style 9V jack (and fix the volume drop that I've heard comes with true bypassing these, if it happens). I got the jack wired up easy enough, but I haven't been as successful with the rest of the bypass and switching.

All I get when I turn the effect on is the resonant/feedback portion of the circuit, with no guitar wet signal coming through. I suspect it has to do with where I have my input and output coming from, since there were two wires initially coming from the input jack before modding, one going to the switch (an SPDT that either sent it into the circuit or to the output) and one running directly into the board. Similarly, for the output, a wire was running from the lower left lug (or maybe upper right if my switch got flipped around while modding) of the color switch straight to the ouput jack, so I used that point as board out.

Anyone have any experience working with these? No one really seemed to have a good explanation of this anywhere online. I'll link to an issue J schematic and some pictures of what I've done below. Thanks!

http://www.montagar.com/~patj/smlstone.gif
http://www.diystompboxes.com/smfforum/index.php?topic=119710.msg1118153#msg1118153

thesmokingman

#1
http://www.generalguitargadgets.com/pdf/ggg_sw_3pdt_tb_gi_dcj.pdf
I used this diagram when I wired a sovtek version with LED
I believe I used the dpdt, no LED version of this when I wired a v1 small stone
once upon a time I was Tornado Alley FX