Batboard

I was given a box full of these things on my last visit to the local shop.
Anyway to tweak these things back on freq.? Dont see any internal adjustments at all. Seems they have all drifted off over time.

Chris
N9LLO

UHF Sprit does have adjustments for frequency, Dev., power, & Sq. Most all the coils are plated on the circuit board and are not adjustable.