The Face Germanium - Fuzz kit : cant reach bias voltage under 6.6V with trimpot

Hi, Micha
thanks

What resistance do you have from collektor to Minus of Battery?Did it change while turning Trimpot? Trimpot o.k??
Sorry, Resistance from collector of Q2 to minus battery vary with trimpod from 4,5k ohms to 10.5k ohms

While swicthing the battery on i got same voltage between battery + and feet 1, 2, and 3 from trimpo (8,8 V).

There must be something wrong [Blockierte Grafik: https://musikding.rocks/wcf/images/smilies/confused.png]

You can measure your Trimpot Resistance ! between Lug 1&2 turn it and look if Resistance change,and Lug 2&3 as same.
R between 1 and 2 vary from 0 to 8.5 k ohms
R between 2 and 3 vary from 0 to 10.7 k ohms

Trimpot´s very sensitive to Heat ! so maybe it is broken or you have a Bad solder Joint elswhere.
i struggled to desolder R5 which is very close to trimpot, maybe too much hot ?

Same to germanium Transistors,to much heat,wrong voltage........Exitus.
dont know how to test. the pedal was ok just 6.6v bias. I only changed R5 (desoldering R5 ans volume and fuzz pots to have access), chechek my solders...very disapoiting

There is No Danger for your Amp or your Guitar,you can test but I think it will not work,but try.
True that does not work, when i switch it on it mute the sound

Hi smellslikebleach

yes i try to have the -4.5V on Q2 (i had 6.6 before changing R5 from 1k to 4.7k)

Micha my Q1 bias was 0,34v before the change, it s now 0,28 V

i m lost, i begin to think that taking time do do things is not enough and i need electronics knowledge

Guten tag boths und vielen dank fur die hilfe! (the disapointing things is that it quite worked on 1st try (6.6v) and i only made a small change and took care )

• i can easily take a picture of the upside of pcb, wiring
• to take the downside i have to desoldier it from the other parts (volume, fuzz pots etc). because the dowside if facing the enclosure. Do i do that?

i m a little stupid, did not think about unscrew the pots ...i do it and take the pictures (in few hours, i have to wait to get the keys..)
ps i did even measure the new r5 so new part seems good (4,67 k ohms)

i dont manage to unscrew the pots (i use a product to avoid that
i will try better tomorrow, otherwise i will unsolder to take a picture of bottomside pcb
have a good evening (thanks)

lol like this
i thought it was a good idea to avoid unscrew and better durability (i use it on roller skates it s perfect, and not hard to remove...)
bad idea...i learn with this pedal lol

it s very good for roller ski because you dont want the wheel to be to tight or to lose with vibration
aniway bad idea for pedal pots lol
have a good evening i will try again tomorrow