Quote:
Originally Posted by BeamT
While the label says Motorola, the EIA Code 312 is made by Sylvania. Do you see a date code anywhere?
The yoke bracket is secured with double-sided foam tape, probably no longer pliable. I use a plastic spackling knife to gently separate the bracket from the CRT envelope. You will need some double-sided foam tape to re-secure. The plastic yoke cases are also no doubt brittle, baking in place for over 40 years, remove gently.
It would be very interesting to know from the engineers who designed these sets, how long they thought they would last???
Your existing Tripler looks original to me. If its producing 25KV and its not arcing, its doing what it needs to and could outlast everything else. You could pull the screws, look for signs of arcing, and clean underneath. Your replacement divider looks good.
While you have the chassis out, consider replacing:
The boost filter, if you are using SAMS its C270 10uf 300v, this capacitor takes a beating, and can impact the picture quality.
4.7Meg 2w resister from the focus control to ground. I often find these drift, so will the focus, the original is a carbon comp resister.
Happy New Year!
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Unfortunately no date code, not that I can find anyway. Its possible that Sylvania was the OEM for Motorola's CRTs.
The bracket on the replacement tube fell right off, but it looks like the Zenith one is going to be a bit more a job. I have some good double sided foam mounting tape that will do. Fingers crossed everything comes off in one piece.. this is a very high hour set.
As for the tripler, the I replaced the divider after the old one was cracked and covered in HV putty. After seeing that, I am suspicious of the tripler, even if it looks fine. I've got it all apart so might as well while its out and keep the SCI as a spare.
I'll take a look at those components and see if I can source some replacements.
Since I had to epoxy the base and repaint it, I figured why not make the set unique. I give you the Golden Sunshine Avanti.