ToneBender MK II level pot

[Arangonix]

Hi guys,

need some tips with my breadboarded bender. I built it using Sola Sound Tone Bender Professional MKII layout:

https://www.diystompboxes.com/smfforum/index.php?topic=111775.0

It works as "not-biassed-correctly" and "you-used-unmatched-trannies" should work, but it's definitelly a bender tone I have a problem with pots placing. The attack pot was kinda easy, I put 1st pot lug to ground, 2nd  to groud with electrolitic in between and 3rd to Q3 emiter. It works fine. The level pot is a mystery for me I put 1st pot lug to ground, 3rd to the output cap "output" but I don't have an idea where 2nd (central) pot lug shuld go. Any suggestions?
White wires go from attack pot, yellow ones from level pot.
Here's a breadboard photo:

[antonis]

While waiting for breadbord photo.. 

2nd Level pot lug (wiper) should go to OUT..!!
(to whatever effect is destinated for hooking on..)

[Arangonix]

Hey, thanks for reply!
You mean effect output? I'll try it immediately.

[antonis]

You mean effect output? I'll try it immediately.

Yes, plz do it..

[Arangonix]

Hey, could you check if I did it correctly? Yellow wires come from level pot, blue/brown from output jack.

[dainenagle]

Very cool.

[percyhornickel]

OK since I still have my tonebender in the breadboard too here you´ve got some tips:

- Replace the Q2c 33K resistor for a 100k trimmer, for Q3c just let the 8.2k right there.

- Start increasing from CCW to CW while measuring the Q3c until you read -7 to -8.5V (your taste). -> More than 8.3 starts gating too much in my build.

- Q2c should read -0.1V or 0.2V.

- Try to replace the Q1b 100k to 10K, like the TBMKII with OC75 (your taste). ->Very useful for leaky transistors

- Q1b must read the same or a littler higher voltage than Q3c.

That´s the way you set the bias.

Level pot:

Lug 1 - From 10n cap
Lug 2 - Output
Lug 3 - Ground (+9V)

P.H.

[percyhornickel]

OK since I still have my tonebender in the breadboard too here you´ve got some tips:

- Attack pot -> MAX (CW).

- Replace the Q2c 33K resistor for a 100k trimmer, for Q3c just let the 8.2k right there.

- Start increasing from CCW to CW while measuring the Q3c until you read -7 to -8.5V (your taste). -> More than 8.3 starts gating too much in my build.

- Q2c should read -0.1V or 0.2V.

- Try to replace the Q1b 100k to 10K, like the TBMKII with OC75 (your taste). ->Very useful for leaky transistors

- Q1b must read the same or a littler higher voltage than Q3c.

That´s the way you set the bias.

Level pot:

Lug 1 - From 10n cap
Lug 2 - Output
Lug 3 - Ground (+9V)

P.H.