This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I'm not an expert, but my general knowledge about those florescent light = is that the tube is filled with a gas of some sort that requires an arc = to ignite. A ballast is an inductive winding that on turn on produces a = high voltage that ignites the tube and when current starts to flow it = reduces the voltage to the proper amount to sustain the glow. I suspect the hot ballast has some shorted windings that doesn't produce = the arc and generates heat in the short circuit. Confirm this by following the wires from the 2 lamps that don't work to = the ballast that is hot? Bingo! two witnesses. Guilty as charged. = Arrange for firing squad. =20 Carl Meyer Assoc. PTG Santa Clara, California cmpiano@attbi.com=20 ----- Original Message -----=20 From: Wimblees@AOL.COM=20 To: Pianotech@ptg.org=20 Sent: Sunday, March 24, 2002 3:02 PM Subject: electrical question (OT) Besides being piano tuners, I know many of you have knowledge and = abilities beyond that scope. So I am hoping some of you have a little = knowledge about electrical components in florescent lights.=20 In my kitchen is a four tube florescent fixture. Two of them went out, = so I bought 4 new ones. The same two are still out. So I suspect one of = the two the ballasts are blown. I shut off the electricity, and removed = the panels, and touched both of them. One is very hot, the other just = warm. Now the question. If a ballast is bad, would it just be warm, or = be very hot to the touch?=20 Thanks for the advice.=20 Wim=20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c2/43/41/10/attachment.htm ---------------------- multipart/alternative attachment--
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