Hertz hp1d full rebuild

[Lenin89]

Amp is working now but there are more issues to solve.

Pre amp board, subsonic potentiometer is beyond repair. It has been cleaned up with contact cleaner and reflowed with new solder properly but with no success. If I press the plastic pole inwards really, really hard signal shows up. If there is no pressure applied, signal goes away. Amps work just fine with subsonic switch off, but i want to fix it.

I still can't find 2x6 pin configuration potentiometer as this one. It's VR8 a 100k value. All of the potentiometer are being marked as ALPS.

 

[Perry Babin]

As a last resort, disassemble it, tighten the contacts and clean the tracks while you have it apart.

 

[Lenin89]

Okay, I've disassembled it but i feel like there is a missing part or something is broken. Shouldn't this metal plates be one whole piece ? How do they connect to each another ?

This is my first potentiometer of that type i've taken apart, so

 

[Perry Babin]

The following images are a similar pot but only two sections.

 

[Lenin89]

The plastic "caps" holding the metal pieces on the pot were gone, they have been broken at some point...that make sense why they just fell of after I disassembled the potentiometer.

I don't have any like this from all of the salvage boards I've laying around. Any idea where I can buy new one ?

 

[Perry Babin]

I don't have a source. Try Mouser. Hopefully someone will have a specific source.

 

[MarioRestucci]

Amp is working now but there are more issues to solve.

Pre amp board, subsonic potentiometer is beyond repair. It has been cleaned up with contact cleaner and reflowed with new solder properly but with no success. If I press the plastic pole inwards really, really hard signal shows up. If there is no pressure applied, signal goes away. Amps work just fine with subsonic switch off, but i want to fix it.

I still can't find 2x6 pin configuration potentiometer as this one. It's VR8 a 100k value. All of the potentiometer are being marked as ALPS.

You have PM!

 

[Lenin89]

This one has been fixed also, i've found the same potentiometer from another amp laying around. I have couple of amps which are beyond repair and i'm using them as a donors.

Great thanks to everybody, especially Perry !