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  1.    21 Mar 2016 #211
    Join Date : Oct 2015
    Posts : 2,102
    Windows 10 Pro X64

    Hi,

    Quote Originally Posted by Wynona View Post
    We had one of those on the bottom in the 1940s! It was a Philco. When we turned it off, it took a long time for the bright dot in the middle to finally extinquish itself.
    That is a tuning indicator AKA a "Magic Eye". The reason it takes so long to extinguish (or that's what you think) is that is contains a fluor coating which absorbs light. Just like older analogue watches that had the ciphers coated with fluorescent matter so you could still see the time in the dark.

    So much for the anecdote.

    Cheers,
    Last edited by fdegrove; 21 Mar 2016 at 17:39.
      My ComputersSystem Spec
  2.    21 Mar 2016 #212
    Join Date : Aug 2015
    Penn's Woods
    Posts : 1,266
    Windows 10 Home

    Quote Originally Posted by fdegrove View Post
    Hi,



    That is a tuning indicator AKA a "Magic Eye". The reason it takes so long to extinguish (or that's what you think) is that is contains a flour coating which absorbs light. Just like older analogue watches that had the ciphers coated with fluorescent matter so you could still see the time in the dark.

    So much for the anecdote.

    Cheers,
    Interesting... But I never knew flour was fluorescent! [phosphorescent, right?] But, yeah, still interesting, I remember seeing that smudge at lights and TV off.
      My ComputerSystem Spec
  3.    21 Mar 2016 #213
    Join Date : Feb 2015
    Left coast but not a progressive liberal
    Posts : 964
    dual boot W10 10586th2/14291 rs1 Win. Insider since Jan. 2015

    Quote Originally Posted by Night Hawk View Post
    I just went to use the additional clocks option here you bring from the clock on the system tray and not a problem adding a couple of random time zones in!!

    Attachment 70703

    Once you bring the cursor over the main clock option on the taskbar which can also be hidden or removed those others simply spring out at you! I have to suspect that something is preventing a normal upgrade between builds as to where the problems are being seen with the results being buggy upgrade installs!

    This is where I keep coming back to the need to keep things consistent once you have something going well. If a newer build gets too buggy I will simply toss a fresh copy of the TH2 on again and let that upgrade to the latest.


    I can't say that I blame you for dumping a buggy test build now and then since we ain't getting paid for all that . I rolled one back recently ,the last one was getting to my limits and this one is somewhere in between
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  4.    21 Mar 2016 #214
    Join Date : Oct 2015
    Posts : 2,102
    Windows 10 Pro X64

    Hi,

    Interesting... But I never knew flour was fluorescent! [phosphorescent, right?]
    Yes, it's phosphor which is a fluorophore. Not fluor, which I think is called fluorine in English ?
    Anyway, sorry about that.

    Cheers,
      My ComputersSystem Spec
  5.    21 Mar 2016 #215
    Join Date : Feb 2015
    Left coast but not a progressive liberal
    Posts : 964
    dual boot W10 10586th2/14291 rs1 Win. Insider since Jan. 2015

    [


    Originally Posted by Wynona
    We had one of those on the bottom in the 1940s! It was a Philco. When we turned it off, it took a long time for the bright dot in the middle to finally extinquish itself.
    fdegroveThat is a tuning indicator AKA a "Magic Eye". The reason it takes so long to extinguish (or that's what you think) is that is contains a flour coating which absorbs light. Just like older analogue watches that had the ciphers coated with fluorescent matter so you could still see the time in the dark.

    So much for the anecdote.

    * Most TV's * then had rotary coil tuners like a Collins R390 military radio back then and some of the others all this went digital decades later.

    The cat eye tubes were more for radios and later tape recorders because at the time they were cheaper than a meter .It's more likely her TV was Post war set direct view TV and most of those had rotary coil tuners on the TV's although a few did not


    Maybe she had a Radio TV combo with a cat eye tube or pilot light or it was the CRT emitting when it was cooling down & discharging some of those old dogs would show a prolonged white dot in the middle of the screen when you turned then off and I don't think they had any parallel branch circuits to drain off excess voltage spikes at [set off] .

    IIRC the later aluminized CRTs helped with brightness a lot by keeping the light going forward and not reflecting into the CRT envelope behind the phosphor coatings .


    Wynona, FYI on the cat eye tubes :

    Magic eye tube


    A magic eye indicator, called in technical literature an electron-ray indicator tube,[1] is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio-frequency signal strength, or other functions.[1] It is also called a cat's eye, or tuning eye in America. Its first broad application was as a tuning indicator in radio receivers, to give an indication of the relative strength of the received radio signal, to show when a radio station was properly tuned in.
    - wikepedia-


    The eye tubes were developed as a cheaper alternative to the needle movement metersThe "magic eye" valve for tuning radio receivers was invented in 1932 by Allen B. DuMont (who spent most of the 1930s improving the lifetime of cathode ray tubes, and ultimately formed the DuMont Television Network).[5][6][7] It is a miniature cathode ray tube, usually with a built-in triode signal amplifier. It usually glows bright green, (occasionally yellow in some very old types, e.g., EM4) and the glowing ends grow to meet in the middle as the voltage on a control grid increases. It is used in a circuit that drives the grid with a voltage that changes with signal strength; as the tuning knob is turned, the gap in the eye becomes narrowest when a station is tuned in correctly.
    The RCA 6E5 of 1935 was the first commercial tube
    Magic eye tube - Wikipedia, the free encyclopedia
    -wikipedia-
    Last edited by blutos cousin; 21 Mar 2016 at 19:08.
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  6.    21 Mar 2016 #216
    Join Date : Oct 2015
    Posts : 2,102
    Windows 10 Pro X64

    Hi,

    Wynona was probably referring to the TV screen. I thought he meant the receiver next to it on the right which seems to contain a magic eye as a tuning indicator.
    Guess I jumped the gun.

    I designed valved electronic devices for years BTW. Almost as much fun as fiddling with W10 LOL.

    Cheers,

    BTW, are we all that old ??
      My ComputersSystem Spec
  7.    21 Mar 2016 #217
    Join Date : Feb 2015
    Left coast but not a progressive liberal
    Posts : 964
    dual boot W10 10586th2/14291 rs1 Win. Insider since Jan. 2015

    Quote Originally Posted by fdegrove View Post
    Hi,

    Wynona was probably referring to the TV screen. I thought he meant the receiver next to it on the right which seems to contain a magic eye as a tuning indicator.
    Guess I jumped the gun.

    I designed valved electronic devices for years BTW. Almost as much fun as fiddling with W10 LOL.

    Cheers,

    BTW, are we all that old ??
    I worked on TV and radios early on in life before changing careers .I can still bench a flat panel or a lot of other stuff even though I worked on the old delta gun sets in the early 70's long before flat panels .

    We had 3 CRT color jigs in the shop for the chassis pulls out of the big console sets back then instead of hauling the big sets in for bench work that would take up lots of moving labor and space .
    Last edited by blutos cousin; 21 Mar 2016 at 19:11.
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  8.    21 Mar 2016 #218
    Join Date : Aug 2015
    Penn's Woods
    Posts : 1,266
    Windows 10 Home

    Quote Originally Posted by fdegrove View Post
    Hi,



    Yes, it's phosphor which is a fluorophore. Not fluor, which I think is called fluorine in English ?
    Anyway, sorry about that.

    Cheers,
    It absolutely not a problem, fdegrove. We have lots of fun in my household as we speak English, Flemish, and French! Lots of teasing and word games....
      My ComputerSystem Spec
  9.    21 Mar 2016 #219
    Join Date : Oct 2015
    Posts : 2,102
    Windows 10 Pro X64

    Hi,

    We have lots of fun in my household as we speak English, Flemish, and French! Lots of teasing and word games....
    That's quite impressive. We should talk about that when the occasion arises.

    P.S........Then you should know they never used flour in an emissive display cat eye tube
    Spelling corrector interfering behind my back you know.....Can't trust these things.

    Cheers, you guys are great,
      My ComputersSystem Spec
  10.    21 Mar 2016 #220
    Join Date : Feb 2015
    Left coast but not a progressive liberal
    Posts : 964
    dual boot W10 10586th2/14291 rs1 Win. Insider since Jan. 2015

    O
    riginally Posted by fdegrove
    Hi,
    Yes, it's phosphor which is a fluorophore. Not fluor, which I think is called fluorine in English ?
    Anyway, sorry about that.

    Cheers,
    Looks like we had a language barrier here on my end and maybe you were speaking of a phosphor afterglow or the tube circuits discharging causing same it's all good I'll edit my post accordingly
      My ComputerSystem Spec

 
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