Repair Audio Exklusiv P3

[harlee]

Hi all gurus out there!

Recently, I found a pair of Audio Exklusiv model P3 I guess, with one side functioning in perfect condition, another much softer sounding.

Opening up the cover, found some unfamiliar items inside.
I’m quite familiar with ESL...high bias ~5000V for the diaphragm...impedance matching trans...segmentation...but can’t tell what component this is and it’s purpose. Can anyone help me out?

 

[bolserst]

Looks to be a potentiometer, or variable voltage divider with sliding contact.
What is the component hooked too? HV supply? primary or secondary of step-up transformer?

 

[harlee]

Hi bolders, thanks for replying.

HV supply, if I remember correctly

 

[bolserst]

Interesting...must be to adjust the HV supply level, although you would think there are easier ways to accomplish this.
Can you post pics showing the HV board and where the wires from this component hook up?

 

[harlee]

I have checked the trace, it’s a 3 leg component, connected after the HV supply to the segmentation circuit. I’m not so good at taking picture, hope you can see 🙂

 

[bolserst]

Thanks for the pic, can definitely see wiring going to the HV board but not enough detail to determine its function. My guess would be that it is for adjusting the HV level. You would need to post clearer images of both sides of the board to trace out the circuit. Something like this:Rusty transformer metallaminations

Most likely the problem with the softer sounding speaker is loss of conductivity in the coating. To test this, you can swap the panels between the interfaces to see if the soft sound follows the panel or stays with the interface.