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Installing a preheater! I recently converted my 2nd wraparound which was trigger start. I never had problems with the Advance ballast that was in it, but seemed to underpower lamps. After spending a couple of hours converting the fixture I installed it back. In this fixture now live a Philips and a GE F20T12/D, combined with a Leviton and a Provo starter, supplied by two Frost FBLL preheat ballasts. I already have two extra GE F20T12/D I found yesterday at the recycle centre, which are going in the next preheat fixture! Keywords: Indoor_Fixtures

Installing a preheater!

I recently converted my 2nd wraparound which was trigger start. I never had problems with the Advance ballast that was in it, but seemed to underpower lamps. After spending a couple of hours converting the fixture I installed it back. In this fixture now live a Philips and a GE F20T12/D, combined with a Leviton and a Provo starter, supplied by two Frost FBLL preheat ballasts. I already have two extra GE F20T12/D I found yesterday at the recycle centre, which are going in the next preheat fixture!

100_0236.jpg 100_0306.JPG 100_0722.jpg HPIM3209.JPG HPIM1259.JPG
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Filename:100_0722.jpg
Album name:Vince / Misc fixtures
Keywords:Indoor_Fixtures
Filesize:474 KiB
Date added:Aug 06, 2010
Dimensions:2592 x 1944 pixels
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DateTime Original:2010:08:02 14:54:41
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FNumber:f/2.8
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ISO:400
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URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=2990
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Comment 1 to 8 of 8
Page: 1

Form109   [Aug 06, 2010 at 11:38 PM]
Hey Vince Excactly what is Trigger Start?...and if i do say so myself...cool install!
TiCoune66   [Aug 07, 2010 at 12:41 AM]
The Trigger Start circuit is a modified Rapid Start circuit meant for smaller preheat lamps (usually 20W and lower). Trigger start ballasts heat cathodes at ~ 9V instead of ~3.5V or 4V for 30W and 40W RS lamps.
streetlight98   [Aug 27, 2011 at 08:59 PM]
I always thought trigger start was another name for rapid start
TiCoune66   [Aug 27, 2011 at 10:51 PM]
It's not completely false! The only difference is the voltage sent to filaments. Otherwise it's the same thing. Wink
streetlight98   [Aug 27, 2011 at 11:26 PM]
Is it a lower or higher voltage? Do they make F20T12 RS ballasts?
TiCoune66   [Aug 27, 2011 at 11:29 PM]
Check my first comment above Wink
streetlight98   [Aug 27, 2011 at 11:31 PM]
Oops, sorry. Embarrassed Is the increase voltage to make the lamp life longer or it is just to allow preheat lamps?
TiCoune66   [Aug 27, 2011 at 11:40 PM]
20W and smaller tubes are still made with preheat-type cathodes today. They are double-coil and need a higher preheat voltage. 3 and 4ft tubes got a new triple-coil cathode in the late 50s that doesn't need as much voltage.

Comment 1 to 8 of 8
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