The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Da Man"
Subject: Re: fluorescent lamp inverter problem
X-Newsreader: Microsoft Outlook Express 5.50.4807.1700
X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4910.0300
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 (firstname.lastname@example.org) wrote:
> : "Da Man" wrote in message
> : news:Vx6Q9.1590$Hs3.email@example.com...
> : > 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.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup