August 3, 2019 at 1:33 am #6506AnonymousInactive
no, i hav’t audio probe.. i don’t know what it is..
ok, so i suggest a problem between volume and Q3 or C9 (sound come when i touch)
and what about Q4 ? at the soket and whitout it, i’ve 8/8/0
and i will use socket now! thank uAugust 3, 2019 at 1:41 am #6507AnonymousInactive
i’ve remplace Q4 by a new one and i’ve the same mesureAugust 3, 2019 at 1:18 pm #6513
The middle pad for Q4 (the Base) appears to be a very bad solder connection. Remove the transistor (I hope it is still socketed) and resolder the middle socket position. Replace the transistor and test.August 3, 2019 at 2:32 pm #6514CybercowModerator
Brako – R19 is crucial and while the color bands suggest the “39” portion of the value is correct, the other bands do not seem to indicate that it is a 390K Ω value. I suggest lifting one leg of R19 and double-checking that value for 390K Ω. If it is too low a value, it could throw off the voltages for Q4.
I also notice that some of solder points seem ‘starved’ of solder – perhaps reflowing & adding a touch more solder to some of those more lightly soldered points may be of benefit.August 4, 2019 at 12:08 pm #6537AnonymousInactive
yes cybercow! the eye of the eagle!
it was a 390ohm and not a 390kohm
it’s working!August 4, 2019 at 12:18 pm #6539AnonymousInactive
so new problem! 😉
white noise when no sound on the effect!
but great disto with sound 😉August 4, 2019 at 12:23 pm #6540AnonymousInactive
i have to remplace C10. it’s the last thing to do. so with a 10nJ100 is it possible?August 4, 2019 at 2:15 pm #6542
The mid scoop mod suggests using a C10 value of 12n to 22n. The R20 changes to a 2K7 resistor in series with a B25K pot. Using a 10n cap would yield a variable filter with a cutoff frequency of 575 Hz to 5897 Hz as the pot rotates.
Thanks to cybercow for catching the R19 issue.August 4, 2019 at 9:28 pm #6559CybercowModerator
Brake – “yes cybercow! the eye of the eagle! it was a 390ohm and not a 390k ohm. it’s working!”
Glad to hear that it’s working now. After biting myself in the butt so many times for misreading component values, I developed the habit of measuring every single passive component (and testing diodes\trannies\etc) BEFORE committing to solder.
Wilkie’s pointers should help clean up that noise floor. Good luck!August 5, 2019 at 4:39 am #6566AnonymousInactive
ok, with an electric guitar, it works good, a lot of gain! volume at 1 oclock max to have the same volume with bypass mode.
but with my korg electribe i have this problem, when no sound, a great noisy sound come… certainly the different gain between line mode and a guitar gain you will say me 😉
and i have to check correctly for the mid scoop because it’s seem to make nothing yet…
thank you messieursAugust 5, 2019 at 1:00 pm #6567
A synthesizer can have a much higher output level. It can easily overload the pedal. Also the cable connecting the device to the pedal can introduce noise if it has poor shielding. If you are using a guitar and synthesizer at the same time, you are trying to mix two different signal levels. You will need some type of mixer to handle these different levels. Take a look at the PARAMIX in the shop.August 6, 2019 at 1:39 am #6570AnonymousInactive
so same problem, no problem with a guitar, big saturation.
but big noise with a rythm box when no sound…
i made the green russian last year with the rat and i hadn’t this problem..
paramix seems to be a good solution.
maybe put a switch to have the 2 different signal? (line & guitar)?August 6, 2019 at 1:41 am #6571AnonymousInactiveAugust 6, 2019 at 12:27 pm #6573
With the PARAMIX, you will have both guitar and rhythm signals mixed together. No need for a switch.
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