Messages

I would also be happy to give a try to a dual cornish,...

Hi,
thank you for your fast answer.
PCB I used was the last version available with PCB mounted pots.
I have unwired (cut) the in/out/9V/ground wires from the pedal and it still did not work properly so no problem from the 3PDT switch part.

However, after having tested this, I have removed the three plastic knobs to remove PCB from box and one got its screw unworkable so while removing the gain knob I broke the gain pot.
I will order a new one so it will need some time before I can get the IC voltage.

I will keep posted once I will receive my new pot and will have some time to come back on it
Thanks for your answer.
Ben

Hi All,
I have a Egodriver that was working well for 1 year but now it became to have some problem.
Even with Gain and Vol set at max, the sound is very very low (you can jsut hear a distortion but like your amp were at 1 with your guitar volume at 1)
I have tried with my audio probe and sound is very heavy (more than standard input) up to R7. On left side of R7 the sound is high, on right side is very very low.
I have changed the TL082 with a TL072 and same problem so I guess this does not come from the IC.

I have wired the clip 3 and 2 and did not put any LED in D3 and D4.

Gain is a 500k and Volume is a 100k (only mods compare to original).
C7 is tantalum.

Anyway, this does not come from the MODs as it worked during 1 year...

Any help is more than welcome.
Best regards,
Ben

I am really exciting with these new projects, when do you plan to sell them?

Yes, that was the issue.
At least with that problem I have built my audio probe and will be helpfull with other debugging.
Thanks for your help.

Hi,
in fact the batterie was high due to wrong D3 (I inverted it)
So I fixed this problem, and I have no more batterie getting hot.
Now I have plug either the batterie or the boss adapter, btu as batterie just deliver 8V, someone ask to put a "real" 9V in so I plus the boss adapter.

Could you please suggest other tests to perform?

May IC3 be broken?

When you say problem with the clock, you mean that maybe IC3 is wrong?
(at the origin, both IC3 and 4 were received nearly broken... I supposed that IC4 was KO but with a new IC4 same result.
Maybe problem is linked to IC3 and I should buy one to test it?

What can I do

No, I have just a crack when I touch the pin and then nothing...
:-(

I don't really know what to test now...

voltages at IC4:

from 1 to 8
9,32
4,53
5,22
8,69
0
4,51
7,54
7,54

Any help please ....

Have you checked to connect directly the guitar input to the OCD input?
Maybe your switch wiring is incorrect?
BenoiT.

Hello all,
bad news, the new IC does not work (sound on IC pin 3 of regular guitar, no sound on IC pin 6).
I have checked all connection to check the pcb.
Everything that is connected to each pin of the IC4 is OK
(pin 1 to IC3 pin1
pin2 to IC3 pin 4
pin3 to R19
pin4 to both C132+ and IC3 pin 8
pin 5 to ground
pin 6 to IC3 pin2
pin7 to pin8 to R20

VD 9.35V
9V 9.43V

What other tests can I do?
Whats going wrong with that pork barrel?
Thanks in advance for any help...

Hi,
I have tried with a 9V boss (delivers 9,48V), and I still have no sound.
I am waiting my new IC to check with another IC as the one I received first had legs nearly broken.
I will keep you informed.
I hope I will success in that debugging, cause I have sold my small clone and I want this chorus :-)
Benoit

I have fixed D3 and measure Voltages on

9V : 7.88V

VD : 7.81V

VB : 4.41V (I assume it depends on my trimpot position)

Still no sound after IC4.

Voltages on IC4:
1 : 7,81V
2 : 3,82V
3 : 3,69V
4 : 7,27V
5 : 0V
6 : 3,80V
7 : 6,50V
8 : 6,50V

Does it means that IC4 is dead?

Am I not supposed to have sound on pin 7 and 8?

Benoit.

Thank you very much for your prompt reply.
While taking pictures, I realize chekcing again all components that D3 was not in the good way. That is way I remove my previous message but I did not see you already answered it!

Here the picture of the BAD D3:




I will keep you informed and I will post the voltages of Q when I will fix this pedal!
Benoit.

First of all, thank you all two for your input.
I have find another chip on ebay and I am now waiting for it (from another country it will take some days :-( ).
I will check voltages and send a picture of my pedal (not boxed yet : rock it before boxing it!).
I will wait until next IC receipt before sending picture.
As promised with other people whose pork barrel did not work, I will also send the voltages when I will solve my problem.
I will give you news when I will install new IC4.
Thanks again,
Benoit.

For helping: I have tested the sound until R19 and until R19 I have the guitar regular sound.
I have no sound on R28 and R24.

And I have tested 8 pin of IC4, and it seems that I have sound only on pin3 (connected to R19).
(hard to do a test with my probe on IC but it seems that I have only guitar sound on IC4 Pin 3).

What test could I do?
Does it means that IC4 is out of order (as I supposed first when it arrives with all legs nearly broken)

Thanks in advance for your answer.

Benoit.