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Hi there,

I bought this PCB from the Great B long time ago, however I couldn't started with it since now. Today I've just finished it...

Problem? Only Bypass sound.

I've already checked the wiring around 5 times... But i don't know wtf it's happening... The lamp shines as it should and it vibes when I adjust the trimpots, also the intensity and the speed knobs (Outside LED does the same). So I think the modulation issue is solved...

Here are the voltages reading, I hope you could give me 10 hands

Q1 (J201). D = 17v / S = 0v / G = 0v
Q2 (BC549c). C = 8.9v / B = 1.6v / E = 1.8v
Q3 (BC549c). C = 6.7v / B = 2.6v / E = 2.2v
Q4 (MPSA13). C = 17v / B = 3.1v / E = oscillation between aprox 0 and 9v
Q5 (MPSA13). C = 8.1 - 9.8v / B = 3.5 - 3.8v / E = 2.7 - 2.4v





There's almost nothing written about q-vibe...

I'm really looking forward to hearing from all of you, great builders  

Ignacio

Congratulations Man 

Does he work with batteries? Or only with 9vDC? 

Thinking about your contest... number 8 will guide me through darkness till VICTORY 

Awesome! That's officially the second boobtube out there (I need to get around to making another for Cleggy, I felt sorry for him so he's got mine at the moment).

I've made a lot of valve pedals on vero, my boobtube is also P2P and it's a lot quieter noise wise. It's also the best of the lot sonically too.

Yes ! This lil' beast is totally quiet, well grounded and P2P !!

Based in the Tube Boob project made by Juan Solo and guided by Cleggy ! I Hope you Like it 

It is a very nice sounding Boost / overdrive which everyone would fall in love with (I think it's far better than Tubescreamers and derivates)

A pair of gut shots



As you can see I'm using some mojo components (Carbon Comp Resistors, TAD caps (Mullard Mustard Repro), NOS Sylvania 12bh7A, switchcraft Jacks, Alpha Pots, NOS PIO Russian 1uF CAP)



Its sound is amazing... Only thing I have to watch out is that Valve on the top... I think its a quite fragile pedal  Not for touring (at least, not this design)

I hope you like it

Thanks Cleggy. Thanks JuanSolo !!

Ignacio

 

I'm ready Vinnie... Go Go Go Spaniards !! 

Ignacio From Spain (NOT MEXICO) 

WHat the F$%&  And he is selling everything more expensive than expected !!!

I'm curious how you figured this out. Especially since C7 and R14 don't touch! 
[/quote]

Haha ! Because I was cheking everything up and I realised that I used a big cap there, which lead was touching a little bit the R14 in the components side... I was going mad, because everything was allright, and when I realised that I start laughing !

Solved 

The mistake was an incorrect false contact between c7 and r14. Suprinsingly the effect sounded quite well (as usual) but there was a POP engaging effect, which stopped the sound one second !

Thanks man ! 

Hi Brian ! Every voltage reading is allright in IC3, but not in IC2 and IC1 (only the pins I said, the other ones are ok)... And the 2 27k resistors are 27k !!

What would it be??

I'm sure there's something soldered wrong. I'm going to check everything up !!

I have several errors on IC voltages: Multimeter reads around 7.90v on Pins 1,2,5,6,7 (from IC1) and Pins 1,2,3,5,6,7 (from IC2)

Thanks gtr2.

This is the first time I get this problem, and I'm always using the same IC brands and capacitors. There's something soldered wrong SURE !! But it sounds good. How can it be?

Cool Pedal Jim - My !

I don't know what the designer has said, but the net is plenty of verified Timmy Layouts ! Have you changed something in it?

Ignacio

Thanks Josh !

But... Look at what I have found out 

I have several errors on IC voltages: Multimeter reads around 7.90v on Pins 1,2,5,6,7 (from IC1) and Pins 1,2,3,5,6,7 (from IC2)

That could be the source of the pop... I don't know ! But the effect sounds awesome in spite of those voltage readings !! What could it be?

Hi there Man !!

I've got a POP too   ... but it only does a "it" when the pedal is going to be engaged. I have tried to disconnect de LED, and there was no POP Then... It's a LED Problem...

But I don't know why?? I have built 3 sunkings and this is the fourth, everyone has the same components... WTF is happening?

By the way... I have tried what RG Keen says in his article... Look at the pic (but i'm not sure if i have done it properly). 47uF + 560 ohm resistor + 4.7k led resistor



There are LM313 diodes too  

I need tech help.. I'm a fucking noob... This afternoon i'm going to use different IC because I don't know what to do... HELP !! I need Somebody HELP !! 

Wow Brian ! It looks great  ... When are you going to record something to ear/see?