From: Sandy King (sanking@clemson.edu)
Date: 12/10/01-12:04:53 PM Z
Jeff,
What you can also do is place a thin piece of sheet metal under the
bulbs and tie this in to the common ground. That is what one would
typically do in building a unit from individual bipin holders. To get
maximum reflectivity paint the metal white. The metal can be very
thin for this purpose.
Sandy King
>hmm, interesting. The 2 tubes I have put in to
>test the unit did flicker on startup and then were steady - less
>than 1 minute to get there. as far as the metal ground reflector, I
>did
>see that the ballest was grounded via the metal (green screen), but did
>no do anything about it :-). I will tie all the ballest housing
>to ground and see if the behavior changes.... thanks for the
>info. The inside of the box is painted white, I am not
>using any other "reflectors" inside.
>
>Jeff
>
>Sandy King wrote:
>
>>Jeff wrote:
>>
>>
>>I used ready-made 2 bulb fixtures and had planned to install them
>>as is - but the were longer than I had measured so I pull
>>their guts and installed the ballast and bulb pins directly in
>>the box.
>>
>>How did you handle the problem of the reflectors and the need for
>>the bulbs to be in close proximity to a grounded metal backing? It
>>has been my experience in working with the two-tube holders that if
>>you removes the reflectors the tubes turn on erratically, or not at
>>all. When I built my first BL unit I removed several of the
>>reflectors, for reasons I can not recall, and had all kinds of
>>trouble (flickering, lights turning on erratically, etc.) with the
>>unit. Then someone told me they played an important role in the
>>correct functioning of the lights and I put them back on and the
>>probems were solved rightr away.
>>
>>
>>Sandy King
>>
>
>
>--
>---
>Jeff Foster - SDA UNIX
>UC Berkeley CA
--
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