"Michael A. Terrell" writes:

Sam Goldwasser wrote:

This one was rather strange, at least to me.

One of two horizontally mounted spiral GE CFLs in a semi-enclosed fixture
simply winked out. It's one I had repaired cracked solder joints on a year
or so ago so I figured time to resolder if the transistors/MOSFETs weren't
toast.

Checked all common suspects for shorts/opens as well as the lamp for
good filaments, no problesm found.

Resoldered some questionable joints - no sign of life.

Then I noticed IT - a dimple near one end of the tube and a resistor
lead could be inserted straight into the inside. A pinpoint on the
inside surface of the glass must have gotten really hot.

How often do you see that?


Not often, but then I usually just replace bad bulbs.

What fun is that?

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
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