I tried unsuccessfully to solder to that filament pin....I believe I have two problems here. The break is below the glass surface so all I have accessable is the tip of the wire. I do have a bit of a cavity to work with.
The second issue is that the glass surrounding that wire tip is acting like a heat sink, preventing me from making a good connection.
I afraid to grind down to expose more wire at the risk of further damage but I don't believe I have much choice
