Zero sound - need a sanity check

[Dito]

Okay, so. I'm building the Krampus Bass Overdrive from General Guitar Gadgets. I've got everything wired up, and I get nothing, not even a crackle. I don't even get anything when it's switched to bypass. I've tested continuity on every single wire, jack lug, and switch lug. Nothing failed the test.

The LED lights when it should, so I've got current flow happening. But zero sound.

I know JD Sleep from GGG is restrictive about posting his projects, so I'll link to it instead and hope that doesn't get me slapped. The bypass wiring method is different than others I've seen, but in my understanding, it should work. Like I said, I tested all the switch lugs in pairs, switched on and switched off. Everything passes.

Here's the wiring diagram provided: http://www.generalguitargadgets.com/pdf/ggg_its8_bass_lo.pdf

I even connected my guitar directly to my amp to make sure those didn't magically stop working. I even swapped the cables. I tried intentionally swapping the guitar-in cable for the amp-out cable, in case I wired something bass-ackwards. Nothing. Not even when switched to bypass.

Does anyone see anything unusual in that diagram? I'm not suggesting it's wrong, I just need a sanity check after about 4 hours of continuity testing.

(I'd post a picture of my box, but everything is mounted and it's a maze of wire.)

Thanks,


-Dito

[duck_arse]

the diagram looks - ok - to me. but, photos, or it never happened, you know the rules.

try this. no battery - plug in a cable, measure resistance across the other end. work bypass, etc. then plug into other jack instead, repeat test.

do you get a low resistance reading at any stage?

[Dito]

try this. no battery - plug in a cable, measure resistance across the other end. work bypass, etc. then plug into other jack instead, repeat test.

do you get a low resistance reading at any stage?

What do you mean by "the other end"? Where input becomes output?

I'll try to take pictures, but like I said, it's all assembled. I soldered leads as needed to all the components, mounted them, then set about making the connections (to the PCB and elsewhere). Was this a flaw in judgement on my part? I was trying to be cognizant of keeping the wire runs reasonably short and not making a mess of things.

I'll do more troubleshooting once my willpower and patience meters fill back up. Yes, I treat life as a video game.

[duck_arse]

I thort you had it to "put in the box" stage. I meant to plug a standard lead into a jack, and then measure across the plug on the other end of the lead. and then do the other socket.

[Fender3D]

If you don't hear any noise, in bypass also, you might have a tip/ring swapped on your jack sockets, or GND shorting to signal path...

Try with a sanity probe 
following signal from output jack backward to input.

[Dito]

Try with a sanity probe

I'll call my psychiatrist and ask to borrow his sanity probe. I might need to call him anyway, if this project continues on its current trajectory...

[Dito]

If you don't hear any noise, in bypass also, you might have a tip/ring swapped on your jack sockets...

Hey guys, guess what I learned today? Mixing up tip and sleeve lugs on your output jack makes a HUGE difference in how well your effect works.

It didn't work at all before; now it works brilliantly.



Thanks for letting me vent, decompress, and bounce ideas around.

[slashandburn]

I was about to chime in, I see you've got it fixed.
I had an absolute nightmare recently with an LPB1. I went through god knows how many switches and sockets. I'd got the pinout wrong on these:


Better yet, I snapped the tip off at least 3 of them, convinced it was a redundant lug that would only confuse me.

[Fast Pistoleros]

I was about to chime in, I see you've got it fixed.
I had an absolute nightmare recently with an LPB1. I went through god knows how many switches and sockets. I'd got the pinout wrong on these:


Better yet, I snapped the tip off at least 3 of them, convinced it was a redundant lug that would only confuse me.

you should test the pins for conductivity with a DMM  and label them in a fashion so that you know what end is going to what on the TRS of teh input jack before you wire it up to save a huge headache 

[duck_arse]

SOMEBODY ought to come up with maybe a stereo plug, with it's own batteries and leds, to indicated yes/no/almost when plugged into a jack.

they'd make a fortune selling them!

[Dito]

SOMEBODY ought to come up with maybe a stereo plug, with it's own batteries and leds, to indicated yes/no/almost when plugged into a jack

Brilliant. I'll work on it.

My problem was with a mono jack, which is even more embarrassing.