BK Precision 2910 R/C Pak...

[SolomonMan]

All,
Picked up one of these the other day from a Swap sale.

How would one test this unit? Would using a multimeter and going thru every possible value be the method?

These have electrolytic capacitors in them according to my research...so not sure if they are problematic.

Thoughts?

Thanks,
Chris

[redwire]

Take it apart and look for burned resistors, especially the lower values. You can confirm their resistance with a multimeter.
The 3 electrolytic capacitors probably need reforming/replacing due to age. I would check their capacitance and leakage. Nowadays you rarely add in a 450V cap to see if that fixes things. But back in the day when you suspected a cap of being open or low value, you'd use this box to parallel up a known good part to see if that fixed things, like hum in a guitar amp or a TV, radio in tube gear.
I think cleaning the rotary switches is the hardest part, sometimes they have a lot of oxide.
BK 2910 Manual