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Old 01-18-2009, 10:05 PM #1
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Default is my cold cathode broken?

I recently stripped a cold cathode out of a scanner, and *I powered the inverter up w/ 12vdc (8 alkaline batteries in series) and it seems to get really hot when I turn it on, and also the ends get black, so is it broken?


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Old 01-18-2009, 10:08 PM #2
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Default Re: is my cold cathode broken?

Quote:
Originally Posted by [ch12290
]I recently stripped a cold cathode out of a scanner, and *I powered the inverter up w/ 12vdc (6 alkaline batteries in series) and it seems to get really hot when I turn it on, and also the ends get black, so is it broken?
Could you show us some pictures?

I had one of these once ( two infact ) and they both got very hot. Maybe the inverter needs more juice?
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Old 01-18-2009, 10:12 PM #3
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Default Re: is my cold cathode broken?

it is black on the end
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Old 01-18-2009, 10:12 PM #4
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Default Re: is my cold cathode broken?

the inverter works, gives a pretty nasty shock
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Old 01-18-2009, 10:13 PM #5
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Default Re: is my cold cathode broken?

the thing will power up, but will get very hot(enough to feel uncomfortable on skin)
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Old 01-18-2009, 10:17 PM #6
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Default Re: is my cold cathode broken?

yeah that's fine then, that's how it should work
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Old 01-18-2009, 10:22 PM #7
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Default Re: is my cold cathode broken?

The thing is that the dark spots on the ends seem to get bigger with use :O
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Old 01-18-2009, 10:37 PM #8
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Default Re: is my cold cathode broken?

cold cathode.... :
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Old 01-18-2009, 11:03 PM #9
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Default Re: is my cold cathode broken?

kinda ironic because I don't think my hot cathode cfl's get that hot :P
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Old 01-19-2009, 03:00 AM #10
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Default Re: is my cold cathode broken?

CCF tubes DO get warm, but they shouldn't get hot enough to burn you.

Chances are you are probably overdriving the inverter. Try something like 6V and see what happens.

EDIT: I wouldn't recommend touching the inverters HV output, they give you RF burns, which go very deep and hurt ALOT!
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Old 01-20-2009, 04:32 AM #11
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Default Re: is my cold cathode broken?

Check the 8 batteries, they shouldn't be over 12v.
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