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16AP4 picture tube
#5

Thanks Bob for the info and posting the pictures! Most of the tvs I have worked on have the picture tube mounted to the cabinet and yoke mounted on the neck of the tube. I could usually pull the chassis and flip to where I could service. Most of the older sets have the tube mounted to the chassis, making removal and service simple, but heavy. I really didnt know how I was going to deal with this set. On a good note, I had read somewhere an article about how companies were "recycling" tubes back in the 50's I think, and would cook the filaments to rejuvinate. This tube would barely move the needle on the tester/rejuvinator when I first tested it. I think the set has been idle since the 1960's. I left the tester on the heater (6.3v), then turned up to 8v for about 1hr. When I returned it to 6.3v, let it sit for several minutes, the reading had raised to the high side of 'bad', to just under the '?'. I may do this again and see what I get. Should be enough to run the set now. I dont know long this will last, but I doubt I will ever use the set enough (after recapping/repairs) to pull the tube down. I am reluctant to do a 'rejuvinate', as I have seen some tubes lose focus and sharpness. I think I read it also strips some of the emission coating from the cathode, and enlarges the hole in the end of the gun.

I will start searching for one of those test tubes.

Thanks again Bob

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
16AP4 picture tube - by TV MAN - 09-17-2014, 05:47 PM
RE: 16AP4 picture tube - by Big Dave - 09-22-2014, 08:18 PM
RE: 16AP4 picture tube - by TV MAN - 09-30-2014, 08:00 AM
RE: 16AP4 picture tube - by Bob Andersen - 09-30-2014, 02:59 PM
RE: 16AP4 picture tube - by TV MAN - 10-03-2014, 09:15 AM
RE: 16AP4 picture tube - by TV MAN - 12-11-2014, 10:19 AM
RE: 16AP4 picture tube - by Don Lind - 12-11-2014, 01:54 PM
RE: 16AP4 picture tube - by codefox1 - 01-03-2015, 10:51 AM



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