The filament is circular going around the circumference of the glass and is
supported by 5-6 separate wire posts -- each topped with a loop to
support/lock the filament wire.
When touching the meter leads together-- the needle deflects all the way
Could be, but I'm pretty sure that ALL bulbs don't use a fusable link in
Sometimes the filament will open right where it's welded to a feed wire
and stay in position so it looks like it's continuous. Giving the bulb a
flick with your finger while observing the filament will let you see it
it jump away from the feed wire momentarily.
BTW, the fusable link was/is placed in some bulbs to avoid popping a
breaker or fuse if the bulb goes into a "tungsten arc" mode when the
filament opens. That arc can cause the bulb to draw MUCH more than it's
rated current. If you've ever flicked on a light switch and had the bulb
give one VERY bright flash and then go dark, you've witnessed a tungsten
As you've been told already, try a new bulb.
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