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    Neon light transformer identification

    Hi,

    I have this transformer and i would like to know what is the maximum neon light power (in watts) i can use with (cause there is no "watt information" written on) ? I have a 22 watts neon light, will it explode ?

    I hope my question is in the right section of the forum.
    And sorry for my little english !

    Thanks for any help !
    Attached Files

    #2
    Re: Neon light transformer identification

    Where did you get this from?
    It looks like magnetic ballast...
    Tw 120 = Max working temperature of the winding within the ballast, 120c
    Delta T of 55 = Temeprature rise of 55c.
    https://www.giangrandi.ch/electronic...enttubes.shtml
    https://www.electrical-installation....orescent_lamps

    What kind of NEON LIGHTS are you working with? They need high Voltage.
    Last edited by budm; 02-03-2020, 06:22 PM.
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment


      #3
      Re: Neon light transformer identification

      that's just a 20w flourescent lamp balast - not a HV stepup.
      you can even see the diagram of the tube and starter on it!

      Comment


        #4
        Re: Neon light transformer identification

        Thanks for your answers guys !

        It comes from a neon sign from the 80's or 90's and yes i think this is a ferromagnetic ballast (i said transformer because i didn't know if ballast was a term used in english too).

        So it is a 20W maximum ballast ? So my 22W fluorescent lamp will be destroy if i connect it to this ballast ? ( https://www.amazon.fr/Osram-Lumilux-...s%2C165&sr=8-1 )

        Comment


          #5
          Re: Neon light transformer identification

          It can handle up to 20W, not putting out 20W, so if you overload it then it will over heat ballast.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment


            #6
            Re: Neon light transformer identification

            Originally posted by budm View Post
            It can handle up to 20W, not putting out 20W, so if you overload it then it will over heat ballast.
            N...no. Its a choke, is all magnetic ballasts are. You can connect them directly across the line and they will sit there and pull 20w happily.

            Once a tube is struck, its akin to a short circuit. They actually display negative resistance, in which, an increase in current through the device causes a drop in voltage across it.

            Magnetic ballasts LIMIT the current through what is essentially a short circuit.

            Now, with that said, under running a tube will result in a HIGHER resistance through the tube and less current to sustain the arc, leaving the tube prone to "ringing" where you will see the arc swirling in the tube, hard starting, lower light output, and the arc "dying" shortly after being established when cold.
            Last edited by goontron; 02-03-2020, 10:34 PM.
            Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

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            Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

            Follow the white rabbit.

            Comment


              #7
              Re: Neon light transformer identification

              I know that it is just an inductor and it is used to limit the AC current through the FL.
              The ballast is basically connected in series with the FL and it is rated to match the required lamps. Isn't that why there is Voltage, current, ballast factor rating on the ballast and since once the lamp starts conducting, it is not really shorted circuit is it? Am I missing something as to why the ballast will burn out if I do not properly match the lamp and the ballast rating if the ballast can truly be connected directly across the line? May be the core will saturated if it is connected across the line.

              https://unvlt.com/literature/trouble...erheating.html

              https://uk.rs-online.com/web/general...ballasts-guide

              http://www.lutron.com/en-US/Service-...Selection.aspx
              Last edited by budm; 02-04-2020, 12:38 AM.
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

              Comment


                #8
                Re: Neon light transformer identification

                the point is, it wont run a "neon" tube.
                that takes a stepup transformer - usually 3-5Kv

                Comment


                  #9
                  Re: Neon light transformer identification

                  Here a photo of the full installation (where you can see the starter).

                  Yes Stj, my mistake, it is not a "neon" tube but a fluorescent tube (i will change my title).

                  So first, will this new generation fluorescent tube ( https://www.amazon.fr/Osram-Lumilux-...80&sr=8-1&th=1 ) will work on an old ferromagnetic ballast ? Or it requieres a electronic ballast ?

                  If yes, will my 20W ferromagnetic ballast be compatible with this 22W fluorescent tube without risk of damage ?
                  Sorry if i ask quite the same question but Budm said there is a risk of ballast overheat and then Goontron said this "the arc "dying" shortly after being established when cold" which i don't really understand and if it means a risk of damage of the tube ?

                  In any case, thanks because i have learn several things but i guess i still need a "Yes or No" of the noob i am :p
                  Attached Files

                  Comment


                    #10
                    Re: Neon light transformer identification

                    Seems like i can't edit the title sadly :/

                    Comment


                      #11
                      Re: Neon light transformer identification

                      The last picture that you posted is a old stile ballast I find that this type last for a very long time if change the tubes when first start going bad or if start has trouble lighting the tube

                      This type of ballast last a very long time
                      9 PC LCD Monitor
                      6 LCD Flat Screen TV
                      30 Desk Top Switching Power Supply
                      10 Battery Charger Switching Power Supply for Power Tool
                      6 18v Lithium Battery Power Boards for Tool Battery Packs
                      1 XBox 360 Switching Power Supply and M Board
                      25 Servo Drives 220/460 3 Phase
                      6 De-soldering Station Switching Power Supply 1 Power Supply
                      1 Dell Mother Board
                      15 Computer Power Supply
                      1 HP Printer Supply & Control Board * lighting finished it *


                      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                      2 Hem Saw Computer Stack Board

                      All of these had CAPs POOF
                      All of the mosfet that are taken out by bad caps

                      Comment


                        #12
                        Re: Neon light transformer identification

                        OK, so you are using Fl not NEON, the 22W FL should be find (the current rating on the ballast is high enough to handle 22W).
                        As suggested by Sam, they last a long time as long as you change the tube when it start going bad, I.E. it starts showing blackened ends.
                        Never stop learning
                        Basic LCD TV and Monitor troubleshooting guides.
                        http://www.badcaps.net/forum/showthr...956#post305956

                        Voltage Regulator (LDO) testing:
                        http://www.badcaps.net/forum/showthr...999#post300999

                        Inverter testing using old CFL:
                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                        http://s807.photobucket.com/user/budm/library/

                        TV Factory reset codes listing:
                        http://www.badcaps.net/forum/showthread.php?t=24809

                        Comment


                          #13
                          Re: Neon light transformer identification

                          that will work - dont forget the starter needs to be o.k. for the wattage.
                          (and should be replaced when you change the tube)

                          Comment


                            #14
                            Re: Neon light transformer identification

                            It worked !
                            The new tube works like a charm without flickering, so sould i despite everything replace it ?

                            Thanks all for your help ! One more victory of the second hand !

                            Comment


                              #15
                              Re: Neon light transformer identification

                              Just a recommendation

                              If you replace the tube then you should also replace the starter
                              Or you might encounter a bad tube again shortly
                              9 PC LCD Monitor
                              6 LCD Flat Screen TV
                              30 Desk Top Switching Power Supply
                              10 Battery Charger Switching Power Supply for Power Tool
                              6 18v Lithium Battery Power Boards for Tool Battery Packs
                              1 XBox 360 Switching Power Supply and M Board
                              25 Servo Drives 220/460 3 Phase
                              6 De-soldering Station Switching Power Supply 1 Power Supply
                              1 Dell Mother Board
                              15 Computer Power Supply
                              1 HP Printer Supply & Control Board * lighting finished it *


                              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                              2 Hem Saw Computer Stack Board

                              All of these had CAPs POOF
                              All of the mosfet that are taken out by bad caps

                              Comment

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