Victrola 10-50: loud motor hum

I've been working on this machine for a few weeks and it has been playable with single records since then. The motor has always had what I would call a normal 60 hz hum to it, just noticeable with the door open and being right up close to it. Now suddenly it has become MUCH louder even with the door closed, even vibrating and resonating thru the cabinet and rattling it. Is there any adjustments that can be made to it, or has something gone bad on it? Thanks!

Update: I found that if I simply pull on the forward lug wire on the right side a little with a screwdriver, the noise completely vanishes. So on the coils, I'll just dial in all the screw and bolt positioning/torque while it's running. Probably just one loose on there farther back. I'm glad it's not something serious or broken. I'll update with exactly what fixes it.

I retightened all the lug connections, and shoved a small snip of rubber between the lug strip and the coil on that side to act as a vibration absorber, nice and quiet now.

Hi Mark:

Many thanks for providing this information. I've heard from a number of collectors that motor hum is a frequent problem with many of the early electric Victor motors. Glad to know that there's a solution.

JDS

There's probably more than one cause of hum in these things, but this fixed mine. I think they are just very finnicky and sometimes you may simply need to poke and prod them until the hum is addressed. Definitely want to make sure all the bolts having to do with the coils are nice and tight.