Subject: Re: Looking for 6v fluorescent power supply
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NNTP-Posting-Date: Sun, 15 Dec 2002 19:29:35 EST
Date: Sun, 15 Dec 2002 19:37:19 -0500
Actually, I am building a highly portable short-wave UV lamp using a =
(9 W U-shaped CFL) germicidal lamp. I have cannibalized a 4W and 6W =
lantern and both ballasts will drive this tube, but not at 9 W. The 4 =
ballast drives it at 1.8 W (300 ma @ 6V) which is the current draw when =
4 W tube, and the 6 watt ballast drives it at 2.1 W (350 ma @ 6V) which =
current draw when using a 6W tube. This seems fine for my application, =
would want to drive the tube somewhat harder, hence the desire for a =
As to the AA cells, I really want the portability, and anything larger =
much heavier and bulkier. I would like this lamp to fit in my pocket. =
lamp won't be used continuously. However, surprisingly enough, AA cells =
quite a bit of capacity. From Energizer's web site, the Eveready AA =
cells have a capacity of 2707 ma-hr. Using AA cells, I could probably =
hours on a set of batteries before the voltage falls below the firing =
the ballast. This is highly acceptable. I can always use an external 6V=
supply, but this reduces portability. I could also use 1600 ma-hr NiMh =
If anyone has any suggestions, I would appreciate them.
On Sun, 15 Dec 2002 18:03:00 GMT, "jriegle" put =
random words that came up with:
>If the little electronic ballast in these lamps are working right, they
>dissipate very little energy. The TO-92 cased transistors that some use
>barely or don't get warm at all. I suspect that you are talking about
>driving the bulbs at their rated wattage because the small battery =
>lamps under power them.
>You might try to find the triphosphor version of the F type lamps you =
>because the standard ones are not very efficient anyway. It may be =
>design something to power a 7 or 9 watt biax tube because these are more
>Consider C or D cell batteries. This is not the job for AAs.
>Steve wrote in message
>On 14 Dec 2002 11:26:48 GMT, firstname.lastname@example.org (Andrew =
>together some random words that came up with:
>>In article ,
>> Steve writes:
>>> I am looking for several different 6v power supplies that will run =
>>> tubes: F6T5, F8T5, and a 9watt CFL tube (doesn't need to be the same =
>>> supply). I
>>> want to run the tubes using 4 AA cells.
>>There are a number of torches (flashlights) available in UK
>>which use these tubes, and if you just want one or two such
>>circuits, buying these lights and extracting the control gear
>>is probably the easiest option. IME, they are mostly instant
>>start and give rather short tube life.
>I am looking for a power supply that will give me better tube life and
>efficiency then these simple supplies will.