Philco 50-T702 - Printable Version
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RE: Philco 50-T702 - Crist Rigotti - 05-18-2016
Yeah, the HV rectifier has been replaced. The HV is up where it should be about 5Kv. The picture is very viewable in a semi-dark room.
RE: Philco 50-T702 - TV MAN - 05-19-2016
Arran, that is interesting about the phosphor. I actually read about this recently in an old TV book. It mentioned that the phosphor can even degrade to the point that you can actually see into the tube from the front! Well, no matter if it is low emission or gas, the tube is tired. But, at least it is still giving service, and there is something to be said for that. Crist, that chassis is really looking nice! A little patience will pay off in locating a better tube. It took me over 30 years to find a NOS tube for one of my sets that I could afford. Mine had a line burned across the screen from a vertical sweep failure. That really wrecks an otherwise good picture!
RE: Philco 50-T702 - Crist Rigotti - 05-20-2016
(05-19-2016, 10:19 PM)Madmurdok Wrote: Arran, that is interesting about the phosphor. I actually read about this recently in an old TV book. It mentioned that the phosphor can even degrade to the point that you can actually see into the tube from the front! Well, no matter if it is low emission or gas, the tube is tired. But, at least it is still giving service, and there is something to be said for that. Crist, that chassis is really looking nice! A little patience will pay off in locating a better tube. It took me over 30 years to find a NOS tube for one of my sets that I could afford. Mine had a line burned across the screen from a vertical sweep failure. That really wrecks an otherwise good picture!
Yeah, I'm going to be patient. Anybody have any knobs?
RE: Philco 50-T702 - Arran - 05-21-2016
If you really can't stand watching a dim 7JP4 there are some scope tubes that will work as a cheap substitute, but the phosphors are P1 rather then P4, the drawback of course is that the phosphor is green rather then white. A lot of people go the scope tube route on one of those 3'' Pilot TVs since it's all too common to find one of the original 3KP4s with an open filament thanks to the goofy filament series string those sets used.
Regards
Arran
RE: Philco 50-T702 - Crist Rigotti - 06-28-2016
Still looking for some knobs.