Signal Strength Meter Stuck

[radioboy1950]

Hi all...I have a PROJECTone Mark IIIB receiver with the problem as stated in post title. What are some common causes? There is no movement when tuning, and it's stuck at half scale. I want to put it on my bench after I finish an antique tube radio, and want to know what to check. I don't have a schematic for it.
radioboy1950

 

[avionic]

There is no movement when tuning, and it's stuck at half scale

Does it stay at half scale when you power the unit off?

 

[radioboy1950]

Yes...I shouldn't post things when I'm tired. I tend to forget important stuff. Plus, I'm old

 

[macyjrm]

Two things come to mind from my past experience. First, if you can get some light penetration lube injected at the meter pivot point that will sometimes unstick a frozen meter. It may take a day or so for the lube to work it’s magic. The last stuck tuning meter I repaired was actually stuck because the paper backing on the meter had actually bowed outward enough over time to interfere with needle motion. I carefully re-glued the paper to the back of the meter thus allowing the needle to move freely.

 

[radioboy1950]

Thanks...will check into those.