Telechron telechron 4F53 motor

[gigantea]

I have one of these clocks but it's obvious to me it doesn't have the original motor. It has a copper H3 rotor motor in it. What motor went in these, does anybody know or even have a picture? I could assume it's the F type but I want to see with my own eyes so I know what to look for, maybe find a parts clock so I can get this one right.

 

[davefr]

Most Telechron clocks with an F in the model number used the F style rotor. However the F rotor was quickly discontinued and Telechron switched over to the H-3's even in some of the F clocks. IMHO the H-3's were better rotors especially the copper versions. (quieter, stronger torque and longer life). I tell my customer to do the opposite of what you're doing and substitute H-3's in place of F's. All it takes is a couple standoffs.

 

[gigantea]

OK, yeah, it looks like the one on the right there in your picture. The standoffs are a lot thicker though. I just put new oil in it last night, guess I'll keep it as is. One site says the copper casing H rotor came out in 1951, is that accurate? btw, with deteriorating paper around the coil, is it a good idea to paint it with electrical insulating varnish to stabilize it better there? Or do you just tape it?

 

[gigantea]

This clock has the nickel/brass H3 rotor after all, I don't know why I had in my head it was the copper housing rotor.

 

[davefr]

OK, yeah, it looks like the one on the right there in your picture. The standoffs are a lot thicker though. I just put new oil in it last night, guess I'll keep it as is. One site says the copper casing H rotor came out in 1951, is that accurate? btw, with deteriorating paper around the coil, is it a good idea to paint it with electrical insulating varnish to stabilize it better there? Or do you just tape it?

Use 3M #27 Glass Cloth tape. Don't use ordinary vinyl electricians tape. It won't hold up to the heat. You can also use large diameter heat shrink tubing if you solder on the wires and then press the terminals flat. You'll need to remove the coil from the frame. For tubing, I like double wall adhesive lined marine grade heat shrink. About 35mm.

 

[gigantea]

I've used both those methods, I forgot about it. I have the glass tape and large heat shrink but not the double walled adhesive lined, I'll look in to that one, never heard of it before. It's been a while since I messed around with my clocks. I don't like electricians tape either. I don't use it for anything, gooey mess over time and looks bad to me.

 

[davefr]

The heat shrink method is my favorite for B coils. It works for H-3 coils if you don't care about bending down the solder terminals and using pig tail connections. Here's a B.

 

[gigantea]

wow that looks solid and clean. Some years ago, I did that with an H3 coil by cutting small slits where the terminals go so that they would stick out but I remember it not turning out as good as I thought it would. It's still OK but could be better, don't even remember which clock I did that to. It's a mess over here, clocks and radios everywhere, along with old fans and vintage stereo equip.