Well I can tell you. I have two Porta Colors. One from 1967 and one from 1976. The one from 1967 was from an ebay auction and did not work when I got it but just needed a new Horiz Ouput tube. It seems to work fin except the horiz seems a little uneven across the screen, kind of like a vertical linearity issue only sideways. (Probably a cap in the Horiz section but it's not bad enough to delve into at this point. More annoying is the AGC noise I get when I hook it to any DVD player I can't seem to adjust it out to get rid of it completely. It does this cycling buzz that lasts about 5 seconds like it is having issues decoding around the dvd's built in copy protection.
the one from 1976 I picked up in a second hand store for 3 bucks and worked right away. The color bleeds like crazy. the higher you turn the color, the dimmer the picture gets. I tried my best to do a basic Purity setup and got it to where it has a decent picture. The red color seem to be where the issue is. the more intense the red the dimmer the picture gets. The red seems to drive the bottom of the screen more than the top. the top of the screen seems a bit darker than the bottom so maybe the yoke is in or out too far? I was hoping to get a service manual before I go too deep into this one as the picture tube seems very strong and when I adjust it out, produces a nice sharp picture.
Like all porta potties, it has Just Awful Dark and bright contrast issues as you dad mentioned Indication little or no DC restoration. If anyone has a Schematic or Even just a tube listing (Neither of mine seems tohave that) I would love to have it.
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Originally Posted by ctc17
I brought back a re-branded GE H4 chassis PB re-brand set from SC. The set it NEW old stock, the tubes and crt test as such. After fixing a few whisker shorted pots its working.
The picture quality SUCKS though. I have heard these were not know for their picture quality...but, out of the box new this crappy. Its a full color picture its just overall poor.
Is this all I can expect?
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