Wiring 69 fuzz issue

[Rob Strand]

You have ground symbols but they need to connect back to +9V.

Cap on gain pot should go to ground (the way you have won't stop it working).

It would help if you have a multimeter.

[iainpunk]

One more question..... the fuzz has to work on a 9v battery.. but how exactly do i wire the battery leads so it doesn't drain the battery when the cable is out of the in/output ?

you get a stereo jack, and use the middle (ring) lug for the battery ground, and the outer (sleeve) lug for all the other grounds. this makes that an inserted mono jack shorts the ring and sleeve connectors, but not having one in breaks the connection.

cheers

[rangermaster]

You have ground symbols but they need to connect back to +9V.

Cap on gain pot should go to ground (the way you have won't stop it working).

It would help if you have a multimeter.

Ok so on the gain/fuzz pot:
Lug 1: - side of 22uF cap & ground +9v wire
Lug 2: + side of the 22uF cap
Lug 3: to Emitter Q2.

?

All the grounds should beconnected to +9v right? All the ground wires come back to one point.

[rangermaster]

One more question..... the fuzz has to work on a 9v battery.. but how exactly do i wire the battery leads so it doesn't drain the battery when the cable is out of the in/output ?

you get a stereo jack, and use the middle (ring) lug for the battery ground, and the outer (sleeve) lug for all the other grounds. this makes that an inserted mono jack shorts the ring and sleeve connectors, but not having one in breaks the connection.

cheers

Thank you. I wasn't sure if i needed a stereo jack

[antonis]

All the grounds should beconnected to +9v right? All the ground wires come back to one point.

All the grounds should be connected to IN Ring while +9V should be connected to IN Sleeve..
(in this way, Battery doesn't feed the pedal when IN jack is disconnected..)

[rangermaster]

All the grounds should beconnected to +9v right? All the ground wires come back to one point.

Thank you.

Quess i'm for now out of questions.

Just learning that's all :-)

[duck_arse]

You have ground symbols but they need to connect back to +9V.

Cap on gain pot should go to ground (the way you have won't stop it working).

It would help if you have a multimeter.

Ok so on the gain/fuzz pot:
Lug 1: - side of 22uF cap & ground +9v wire
Lug 2: + side of the 22uF cap
Lug 3: to Emitter Q2.

?

All the grounds should beconnected to +9v right? All the ground wires come back to one point.

cap (-) to wiper [so called Lug 2], cap (+) to ground/+9V/red.

[rangermaster]

Ok i installed and wired everything today in the enclosure. Everythings works and sounds good. But one little thing...

When i turn the 1k fuzz/gain pot all the way up to 10 it gets silence. 0 to like 8 there is sound and increasing gain but after that it's silence.

Anyone knows what the problem could be?

Q1 Emitter: lug 3
Q2 Emitter + - side 22uF cap: lug 2 (+9v)
22uF + side lug 1

The pot values are measuring fine.

You have ground symbols but they need to connect back to +9V.

Cap on gain pot should go to ground (the way you have won't stop it working).

It would help if you have a multimeter.

Ok so on the gain/fuzz pot:
Lug 1: - side of 22uF cap & ground +9v wire
Lug 2: + side of the 22uF cap
Lug 3: to Emitter Q2.

?

All the grounds should beconnected to +9v right? All the ground wires come back to one point.

cap (-) to wiper [so called Lug 2], cap (+) to ground/+9V/red.

This way lug 1 or 3 is left open ?

[antonis]

Nothing should left open..!! 
(but if you insist, leave lug 1 open - but ground lug 2 via 22μF cap..)

[Rob Strand]

With the exception of the Bias and Contour pots it should be similar to this,



They use a 2.2M resistor to ground instead of the 1M.   1M is fine.

[rangermaster]

Ah thanks. This pot wiring works better

Learned again

[rangermaster]

Yup he's back again. And with another problem.

I build a second fuzz like the previous, it works but i get a LOT of oscillation!

The Bias voltages are good, tried moving wires, tried other tranny's.. no luck. I read a lot about oscillation on fuzzes but i can't seem to figure this one out. In the attachment is a schematic i made. It's based on the Fulltone 69 fuzz but with 2 OC71 transistors. All the pots are equal to the original.

Does anyone have a idea ?

Thanks