Quote:
Originally Posted by Kirk
I have the one they built to plug in where the ballast tube goes- its the same circuit as the one that is "built in" to the 21CT55 that we have running. It came with a hand-drawn schematic, done by David Neegard, the 87 year-old Engineer from RCA.
I will dig it all out and hook it up to a working CT-100 chassis that I currently have on the Test Jig.
Once I know it's OK, I would be happy to share the info with whoever wants it.
Stay Tuned!
Kirk
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Thank you.
Quote:
Originally Posted by Penthode
How much is your supply varying? Do you have aluminum house wiring?
If your supply varies so much that you need a regulating transformer, maybe you should contact your electricity utility.
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It's probably more than 10V throughout the year (sometimes throughout the day) but the main reason for the voltage regulating transformer is voltage dips. There's a big industrial park about 3 blocks away. When we moved in several times a minute the grid would have sharp instantaneous dips (reminded me of welding) that would cause SUBSTANTIAL blooming in all my tube era TVs. I used to think something was wrong with my sets until I ran 3 sets at once and watched them bloom in sync with each other.
It's not as bad as 10 years ago, but on 4 figure sets with unobtainium flybacks that the H output cathode current is very sensitive to B+ variations caused by line voltage changes I 1.) don't want to risk damage, 2.) don't want distracting Blooming.
I think it's all copper, but everything is backstabber (which is kind of trash IMO), and this is a 1970s Belinski home (the home inspector had some choice words for some of the non-electrical construction choices to give you an idea of their standard level of craftsman ship here) and it went through a significant change order mid-build, and the previous owner was a small engine mechanic that modified some stuff. I don't own the place so I don't have a say in the matter. At least if it burns down it's more likely to be mice chewing the wiring than what's here.