Tested: bad A25 potentiometer

[OD is Glorious]

I cannot remember where this is from but I only have pots from Tayda, Stomp and LMS. I populated two Tommy III boards and I did not test all of the components prior to populating. One Tommy III worked great on the PedalPCB platform and the other was just barely generating an effect. So I went over every part and reflowed all solder. The potentiometer that seemed to have an issue was the A25 volume pot - it only let anything through full CW.. I took the potentiometer out and the circuit worked straight away with a different pot. I then tested this one and it was junk.

I can only get a very low reading on this pot with my multimeter. It was new... Here is a picture of the offending component.

 

[jwin615]

Assuming that came from here somehow. Though they're probably out of the same factory SBPs house brand comes.
If you wrench the monthing nut down too hard, you can force the wiper into the track and damage the track.
Or sometimes you just get a dud

 

[OD is Glorious]

Assuming that came from here somehow. Though they're probably out of the same factory SBPs house brand comes.
If you wrench the monthing nut down too hard, you can force the wiper into the track and damage the track.
Or sometimes you just get a dud

Have no idea how I would have their brand since I never ordered from there. Maybe this pot was from a prior kit I messed around with. Maddening tracing it down, but since I populated two boards I could eyeball compare the good and the bad,

 

[RetiredUnit1]

I test all components prior to use. I've had several CTS pots fresh from Mouser that were DOA! And a full batch of switchcraft jacks that had no continuity at the switch. I used a small piece of 1000g wet/dry sandpaper that I folded in half an gently pulled through the switch to remove whatever junk was in them....

 

[OD is Glorious]

I test all components prior to use. I've had several CTS pots fresh from Mouser that were DOA! And a full batch of switchcraft jacks that had no continuity at the switch. I used a small piece of 1000g wet/dry sandpaper that I folded in half an gently pulled through the switch to remove whatever junk was in them....

Interesting. The Tommy has so few components that it is easy to trace, but your message lets me know I need to check every part.

 

[Mentaltossflycoon]

I've had a few dead pots from tayda.