Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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, 06:47 PM
RE: 16AP4 picture tube - by Big Dave - 09-22-2014, 09:18 PM
RE: 16AP4 picture tube - by TV MAN - 09-30-2014, 09:00 AM
RE: 16AP4 picture tube - by Bob Andersen - 09-30-2014, 03:59 PM
RE: 16AP4 picture tube - by TV MAN - 10-03-2014, 10:15 AM
RE: 16AP4 picture tube - by TV MAN - 12-11-2014, 11:19 AM
RE: 16AP4 picture tube - by Don Lind - 12-11-2014, 02:54 PM
RE: 16AP4 picture tube - by codefox1 - 01-03-2015, 11:51 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

[-]
Who's Online
There are currently 2632 online users. [Complete List]
» 2 Member(s) | 2630 Guest(s)
AvatarAvatar

>