1953 Motorola from Canton

[jeyurkon]

Originally Posted by Charlie

Okay, I've got an oddball part here... a coil wound around a .15 mfd paper cap in the horz circuit just before the HOT. The two are connected in parallel. Haven't really seen this before. Can't just leave it... that .15 is sure to go bad at some point (if it isn't already).

So... how do I go about this??? Tell me what you think.

I noticed that and thought it kind of strange. I don't understand whether they were just trying to save space in a tight spot, save money, or if the stray capacitance between the coil and the cap matter. The permeability might matter a little, but I doubt it's much of an effect.

The SAMs might say something about it.

It's fairly easy to restuff the paper caps. You just need to heat it gently with a heat gun or oven until the wax melts and you can then pull out the insides. The wax on the end seems to melt at higher temperature than the wax they dip the whole thing into.

John

[bgadow]

One of the tools on my bench is an old toaster oven. A couple minutes in there and these come apart pretty easily. I would hesitate just a little with this, not knowing just how it might be effected. I have seen coils something like this, but typically they are just a few winds of larger wire.

I have a pile of knobs but would have to go by pictures to try and match. I don't think any of the NOS I have are this old.

[Charlie]

I'm not worried about re-stuffing the cap. My concern is the coil around it... not screwing it up when I heat up the cap. I'd really like to try sliding the coil off the cap so that i can comfirm the value of the cap. The schematic and parts list have a minor discrepancy between the two, but I'm thinking there's a typo error on the part's list.

I can't really get a good picture of the knobs on the Sams. I'll put that on the back burner for now. Come to think of it, the other Motorola I saw at Canton was a 17" model and about the same year... maybe off by a year. It probably used the same knobs this one does or damn close to it.

I'll give my toaster oven a try! Thanks!

[Charlie]

One of the things I noticed was the color of the lettering on the CRT base... it's blue. I've never noticed blue before. I'm guessing this was RCA's way to signify a rebuild at that time. On color tubes, their rebuilds were called Colorama. This one is called Monogram. This is the first time I've seen that name.

[Reece]

Since nobody really mentioned it yet, I'm gonna say that the insulation got packed in there by some mousies; I've seen that sorta thing before. Bet they had itchy toes.

Reece