Just to confirm -- the U-shaped bulb I'm using has only one set of pins. Do
I use two pins on the lamp that are or that are not connected?
Thanks!
On 2011-11-03, at 12:06 AM, Larry Battraw <lbattraw@...> wrote:
On Wed, Nov 2, 2011 at 5:15 PM, b3nzilla <b3nzilla@...> wrote:
> ∗∗
>
>
> Hi all,
>
> After many hard-fought battles with different inkjet printers, I've
> decided to try using the UV method with negative photoresist.
>
> I'm wondering if anyone knows enough about the operation of UV ballasts to
> offer advice:
> I have an old lamp designed to take short, straight fluorescent tunes with
> ballasts on each end (4 pins in total). I'm wondering if that lamp will be
> compatible with this U-shaped bug killing bulb:
>
http://www.homedepot.ca/product/ultraviolet-replacement-bulb-for-bk-80acan-insect-killer/945544
. Of course I'll make sure it fits, but I'm wondering if it's
> electronically compatible.
>
Yes, it should be fine providing you get the filaments connected correctly
(i.e. you need to connect one filament to one side, and vice-versa). You
can check with an ohm-meter for a filament connection to determine a pair
of pins to connect to one side and then use the other pair for the other
side. Sorry if I'm not explaining this clearly but you need to make sure
that you don't cross-connect the pins of the ballast since it could damage
it. The only other thing to check for is the wattage of the ballast and
the bulb you're using. Generally you can use a larger-sized (Within
25-50%) ballast for a smaller tube but not the other way around since
ballasts tend to run hot anyway.
>
> From the fluorescent-light Wikipedia page, I'm having a hard time figuring
> out if the operation on both ends is symmetric.
>
> Yes, operation is symmetric since the tube is fed on AC and has no
polarity. Each tube end has an identical heater filament to connect to one
half of the ballast. If your existing ballast won't work for you there's
always the possibility of buying a proper ballast (And if not integrated,
an igniter) and soldering directly to the tube instead of fooling around
with flaky connectors. You're very unlikely use the light enough to need
to replace it anyway (I've had the same lights for years and only replaced
them when I accidentally broke them). I would recommend using at least two
of the U-shaped bulbs to get enough light to provide an even light
distribution at an appropriate distance.
Regards,
Larry
> __.__Y
>
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