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GE 2' 20W Kolorite with bodge Brand new tube arrived with open circuit cathode. Must have been jolted. This bodge gets it working. Without the link, after cold starting it was still struggling with the writhing snake and mild flicker and getting blackened after a few hours. Poor thing.

GE 2' 20W Kolorite with bodge

Brand new tube arrived with open circuit cathode. Must have been jolted. This bodge gets it working. Without the link, after cold starting it was still struggling with the writhing snake and mild flicker and getting blackened after a few hours. Poor thing.

Osram_LITEGUARD_5__80W_BC_Daylight_4.JPG GE_2__20W_Kolorite.JPG GE_2__20W_Kolorite_bridged_for_open_cathode.JPG Comparing_Triphosphor_and_Halophosphate_White.JPG Thorn_15W_T12_Pink_3.JPG
File information
Filename:GE_2__20W_Kolorite_bridged_for_open_cathode.JPG
Album name:BC5-80 / Fluorescent tubes
Filesize:214 KiB
Date added:25 Nov, 2015
Dimensions:1600 x 900 pixels
Displayed:40 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=2276
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Comment 1 to 15 of 15
Page: 1

Danny   [26 Nov, 2015 at 12:05 AM]
I've got a Hungary GE 20W/54 with same issue! Sadly gone that black bow it won't stay lit
BC5-80   [26 Nov, 2015 at 12:12 AM]
I suspect mine would go the same way if I used it. Sad Most of the cathode must have broken off yours to rob it of electron emission.
Danny   [26 Nov, 2015 at 12:15 AM]
Looking at the cathode shining my iPhone camera through shows its come off one leg sadly.
BC5-80   [26 Nov, 2015 at 01:01 AM]
I'm surprised it went black and stopped working if it still had the full cathode attached and both pins were connected. 2-footers should be able to cold start at one end and sustain emission until emitter depletion, surely?
Danny   [26 Nov, 2015 at 01:02 AM]
that's what I imagined. I might get it dug out and have a play with it tomorrow
BC5-80   [08 Jan, 2016 at 12:24 AM]
I've had this in my landing light for a month now. It starts and runs perfectly every evening. You would never know it was compromised, and the light it gives is simply gorgeous. It brings everything to life.
BC5-80   [12 Jun, 2016 at 08:16 PM]
To test this on a newly acquired Quickstart ballast I removed the shorting link. Low and behold the cathode has made contact, >4 Ohms cold resistance. I carefully inserted it into my landing light just modified for Quickstart (with PFC correction), and both ends now glow as nature intended. Result!
FrontSideBus   [12 Jun, 2016 at 08:41 PM]
It was probably rectifying.
BC5-80   [12 Jun, 2016 at 09:26 PM]
No rectification has taken place at any time. I would know. My eyes are well trained. It is working normally.
eclipsislamps   [12 Jun, 2016 at 11:56 PM]
If I was you i'd give that electrode a few belts from a decent sized elecrtolytic capacitor, to make sure that fillament is fully welded on
Kev   [13 Jun, 2016 at 12:02 AM]
I've had a GB GE 100W 840 in my barn with the cathode linked for 3 years now!!
Danny   [13 Jun, 2016 at 12:11 AM]
I never even thought of that at the meet but I remember it there at the last one I went to!
BC5-80   [13 Jun, 2016 at 12:14 AM]
Kev I'm amazed an 8-footer starts with shorted cathode! eclipsilamps, it's benefiting from gravity and working normally. I'll probably leave it for a few years until EOL.
Kev   [13 Jun, 2016 at 12:19 AM]
On 125W gear!
BC5-80   [13 Jun, 2016 at 12:28 AM]
Of course! Makes sense.

Comment 1 to 15 of 15
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