#61
|
||||
|
||||
Good luck with your set. I continued on with some testing tonight. The ion trap and focus electromagnet appear to be good. Next, I'll check out the yoke and power transformer.
I also did a little test cleaning. That greenish/grey coating does clean off the caps and chassis fairly easily, but not not looking forward to doing it It turns out modern 25W Ohmite resistors are 2" long and will fit nicely using the old hardware While rummaging around for power resistors, I came across this one in a box that came with the set. It's identical to the existing HOT resistor except it's bad. Perhaps it's the original and was replaced long ago |
#62
|
||||
|
||||
A silly question I'm sure, but how did you ascertain that these components are good?
|
#63
|
||||
|
||||
Not silly at all. I compared their resistance to the value indicated in the schematic. I can check the yoke and flyback with my EICO 944. As for the power transformer, I figure I'll pull the 5U4s and fire up the set.
|
#64
|
||||
|
||||
#65
|
||||
|
||||
Great Score Bob! Congratulations!
|
Audiokarma |
#66
|
||||
|
||||
#67
|
||||
|
||||
Now onto some cleaning. I'm using a light application of Naval Jelly wiped down with a damp paper towel after a few minutes. Then a little spray of contact cleaner to flush out any remaining crud. I noticed Winky Dink came up with a similar technique recently
You can see how this chassis might have looked when new in the section that was protected. Making progress. The focus magnet and yoke supports cleaned up very nicely too. I found this label on one of the tubes. That address is close to where I found the set. Good thing I popped off the HV cage. One of the missing focus coil screws was hiding in there! Last edited by bandersen; 02-02-2013 at 07:28 PM. |
#68
|
||||
|
||||
While you have access to the 1B3 socket, check the 1 Meg resistor. Mine measured over 8 Meg.
Dave Last edited by Zenith6S321; 02-16-2015 at 06:31 PM. |
#69
|
||||
|
||||
Thanks for the tip. Mine measures just a hair over 1Meg - the 3.3 ohm resistor is good too
|
#70
|
||||
|
||||
Quote:
the ads for these projection set adaptors first appeared. Cliff Last edited by cbenham; 02-05-2013 at 09:45 PM. Reason: clarity |
Audiokarma |
#71
|
||||
|
||||
#72
|
||||
|
||||
VERY nice and clean! That might inspire me to try some good cleaning on my sets. My CT-100 has a rather grungy-looking chassis and deserves to look better, for one.
__________________
Chris Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did." |
#73
|
||||
|
||||
Avoid abrasives. You can get a lot done with isopropyl alcohol, Naval Jelly, and non-scratch plastic cleaning pads.
Phil Nelson |
#74
|
||||
|
||||
#75
|
|||
|
|||
Bob, is that cage "blued steel", some kind of plating or is it just paint? If it is blued, you may try some gun blue from a sporting good store or gun shop. I have found some transformer bells that were blued but somewhat rusty. They responded very well to cleaning and bluing. What comes to mind is a lot of Allied Radio Knight-Kit transformers.
|
Audiokarma |
Thread Tools | |
Display Modes | |
|
|