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From: "Da Man"
Subject: Re: fluorescent lamp inverter problem
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Date: Tue, 31 Dec 2002 23:41:14 GMT
NNTP-Posting-Date: Tue, 31 Dec 2002 19:41:14 AST
"Eric Y. Chang" wrote in message
> Da Man (email@example.com) wrote:
> : "Da Man" wrote in message
> : news:Vx6Q9.1590$Hs3.firstname.lastname@example.org...
> : > Is the 120V AC starter still connected to the tube? That sounds like
> : > problem! This is very likely if the lamp only has 2 pins, and not 4.
> : >
> : > Basically if the starter (discharge tube with bimetallic contacts) is
> : still
> : > there, it's probably trying to start the lamp after it heats up
> : > takes a second or two!). They also produce bluish purple glow.
> These compact fluorescent tubes are very simple, since all the starting
> electronics are in the ballast.
Often the base only contains a magnetic ballast, and the starter is part of
the tube socket, since the starters wear out. 4 pins are usually needed to
fire up a tube without a high voltage kick.
> There are just two pins. One going into
> each end of the tube. They usually do not have a starter.
There is very likely a perminant starter bult into the plug of that tube if
it only has 2 pins (usally in between the pins in a little protruding box
(the starter is simular in size to a NE2 neon indicator bulb)). At least
every 2 pin tube I saw had one built in. The 4 pin ones had the starter
built in the base, or had an elecronic ballast instead of an magnetic one.
Check with a normal tube to be sure. That really does sound like it has a
starter in it, with the blue flash and then the tube going out. Besides,
what else would make a blue flash?
> : Also since the unit does not have a normal ballast, a normal starter is
> : needed and can't be used (without problems).
> : > > I used a 13 watt bi-pin compact fluorescent lamp that fits into one
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ actually, tube
> : > > those desk lamps. It has a single tube bent around into a hairpin U
> : > > shape. I suspected too few turns in the secondary, so I used a 17V
> : > > power supply, and got the same results. So, it couldn't be voltage.
> Thanks for the comments. It is not the starter.
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