SOLVED Refractor gain cutting out

[jplev22]

Hi,
I just finished building a Aionfx Refractor. Sounds amazing!

However, I get an odd behavious. Cold I can crank the gain all the way up and it sounds as it should. After about 10 minutes gain lowers on its own.
At that point, If I go from 0 gain and increase it gradually; at about 11oclock it trips down to barely any gain.
If I leave it at a lower gain setting, all keeps sounding good.

Where should I start looking?

 

[Brett]

You may find some help by looking here: https://www.diystompboxes.com/smfforum/index.php?topic=116779.0

 

[Brett]

The problem with the build in the link I shared was C16 (1µF Tantalum) was installed backwards. Without pictures or IC voltages or anything else, it's hard to even begin guessing at what could be wrong.

 

[jplev22]

It was indeed the C16 Tantalum installed backwards.
Reversed its installation and now it seems to sound as it should. Thanks you so much for that link; sure saved me huge amount of troubleshooting time.

On a side note blue locktite = good. Red locktite = permanent / too much. Jack and switch on this box are there to stay...