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
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 856 online users. [Complete List]
» 1 Member(s) | 855 Guest(s)
Avatar

>