Replacement pot for reticule illuminator?

[Zermelo]

A bit of a long shot, but has anyone ever replaced the mini rotary potentiometer in a reticule illuminator?   If so, where did you source it?

Mine has gone a bit "noisy" and randomly cuts out (it's not batteries, nor oxide on the conduction path through the screw thread;  I tested the pot with a meter).

It's this model:

which contains this component:

The only text I can see on it is the resistance: 810k (though my meter measured it at 900k).

It's possible that the reticule manufacturer adapts a generic component, soldering on the spring, etc.

It seems to be completely sealed, so no way in to clean the tracks, if that's the cause of the misbehaviour.

[Louis D]

Well, no, I've never had the need to replace an illuminator pot.  All I can suggest is to run it back and forth a bunch to redistribute the conductor and/or scrape off the internal oxide build-up within the pot.  This works great with audio equipment pots when they get "noisy".

[Zermelo]

11 hours ago, Louis D said:

Well, no, I've never had the need to replace an illuminator pot.  All I can suggest is to run it back and forth a bunch to redistribute the conductor and/or scrape off the internal oxide build-up within the pot.  This works great with audio equipment pots when they get "noisy".

Yes, that had improved it a bit, but it was still cutting out in places.

[Louis D]

When one of my illuminators died due to bad solder joints that I gave up resoldering; I just bought a cheap, used 12mm Meade Astrometric MA with working illuminator simply for the illuminator for $35 a couple of years back.  The eyepiece is terrible, but the illuminator is terrific.

[Zermelo]

I may end up doing the same!

[Davey-T]

Some on ENS Optical site depends on the thread you need.

Dave

[Louis D]

So far, I've found all modern illuminators to use the same thread.

[wookie1965]

https://www.robtics.nl/en/finders/1274-robtics-illumation-unit-for-finders-crosshair-eyepieces.html

[Louis D]

3 hours ago, wookie1965 said:

https://www.robtics.nl/en/finders/1274-robtics-illumation-unit-for-finders-crosshair-eyepieces.html

That's the style I had solder issues with.  The top thread just under the dimming knob kept unscrewing which put strain on the pot to LED solder joints.

[wookie1965]

54 minutes ago, Louis D said:

That's the style I had solder issues with.  The top thread just under the dimming knob kept unscrewing which put strain on the pot to LED solder joints.

I didn't know just wanted to help I had two sold one, reticule that is and my first one the Illuminator top just started spinning rather than turning off and on like this one. 

[Louis D]

6 hours ago, wookie1965 said:

my first one the Illuminator top just started spinning rather than turning off and on like this one. 

And yet I've had better luck with that style.  Go figure.