Vox V1143 Super Beatle schemo

[g1]

Yes that is the schematic that is missing the diode and resistor I mentioned above. I'm looking for the v1153 revisions to the distortion booster board on the v1153

Ok, sorry, I saw you mention v1143 and thought that was what you were working from. Have you checked other model schematics in case that revision was used elsewhere?
Can you draw in where the diode would be in the existing schematic?
I see there is a 300R where you have described the 1K5, did you see that one? (r401 of block 400)

[Fuzzfactory]

Ok, sorry, I saw you mention v1143 and thought that was what you were working from. Have you checked other model schematics in case that revision was used elsewhere?
Can you draw in where the diode would be in the existing schematic?
I see there is a 300R where you have described the 1K5, did you see that one? (r401 of block 400)

in the picture you see the 1.5k resistor is attached to the relay and a 330ohm resistor? There is a yellow wire coming from that 1.5k resistor. It goes to the distortion booster board. I'm pretty suree the dilde attaches at the .22cap, the 4.7k resistor and the yellow wire that is attached to the 330ohm and the 1.5k

[Fuzzfactory]

in the picture you see the 1.5k resistor is attached to the relay and a 330ohm resistor? There is a yellow wire coming from that 1.5k resistor. It goes to the distortion booster board. I'm pretty suree the dilde attaches at the .22cap, the 4.7k resistor and the yellow wire that is attached to the 330ohm and the 1.5k

The anode of the diode I believe is connected to the emmiter of the Q402 transistor

[x-pro]

Watched it, watched it...
It doesn't make sense, but it's very interesting.
Probably someone has modernized this unit according to their idea of distortion.
You don't have to speculate. It could be wrong.
It is necessary to "separate the cutlet from the flies", to draw the diode connection. Can you see the diode labeling, is it readable?

A 1.5 k resistor could be used with a relay with an operating voltage lower than that required by the documentation.

[Fuzzfactory]

Watched it, watched it...
It doesn't make sense, but it's very interesting.
Probably someone has modernized this unit according to their idea of distortion.
You don't have to speculate. It could be wrong.
It is necessary to "separate the cutlet from the flies", to draw the diode connection. Can you see the diode labeling, is it readable?

A 1.5 k resistor could be used with a relay with an operating voltage lower than that required by the documentation.

It's a flyback diode. It's there to protect the transistor from an inductive load. They probably put it in because the transistors kept failing. I bet there is a schematic with the revisions in the service notes. That's probably why in the v1154 they have FET instead of a relay.

[Fuzzfactory]

The anode of the diode I believe is connected to the emmiter of the Q402 transistor

I'm believe it goes to the base of the Q401 transistor

[Fuzzfactory]

I'm believe it goes to the base of the Q401 transistor

I'm pretty sure there is a vox viscount v1153a and av1153a if anyone has any leads on the schematic for the v1153b let me know.

[Fuzzfactory]

Crickets