Color Potentiometer Replacement - 130XE

[800_Rocks]

 

Does anyone know of a good drop-in replacement for the color/tint trimmer pot on the 130XE?  The one in the pictures has ‘500K’ stamped on it. Does that mean ‘500 kOhms’?

I am working on a 130XE that does a random bad color shift every so often. I can usually get the colors back normal by painstakingly adjusting the tiny color pot via the little hole on the underside of the case. 
 

I was planning to install a UAV so I did so hoping maybe the UAV would not be impacted by the original color pot. However it is impacted just as before… an unexpected color shift kind of at random maybe once every 30 minutes which can be temporarily fixed by tweaking with the color pot. 
 

I took the pot off, disassembled, cleaned it and put it back together and soldered it back on. The pot action is much better now, it’s a lot easier to adjust with a much greater range of color/tints to choose from. However I am not sure I eliminated the random color shifts… rather I only made them easier to adjust when they occur. So to be safe I am looking for a replacement part. 
 

Bonus question… did Atari use the same trimmer pot on all the 8bits?  If yes I’ll order more than one new one. 
 

Color/tint trimmer pot is the one painted pink at R38

pot removed (top)

pot removed (bottom)

with UAV installed. 

[Beeblebrox]

I've come across many different models of the pot in all shapes and sizes so Atari used a few different ones over the years.

 

Back in 2021 I sourced replacement 500k ones for the XE here (in UK) on Ebay UK:

 

https://www.ebay.co.uk/itm/113667124066

10 Pack Trimmer Preset Potentiometer Carbon Variable Skeleton Pot 100R to 1M

 

 

 

 

Pretty sure I successfully installed them in my 130XE

[TGB1718]

1 hour ago, 800_Rocks said:

The one in the pictures has ‘500K’ stamped on it. Does that mean ‘500 kOhms’?

Yes it is 500K Ohms, any trimmer pot of that value that will fit will do, looks like the @Beeblebrox link will get the ones you want

[Peri Noid]

I used a 470K in one of my machines, works good as well. 

Edited April 15, 2023 by Peri Noid