[TowerTalk] Apparent choke balun blown, now what

[Jim Brown]

On 1/14/2025 1:57 PM, N4IJ wrote:
> Anyway it looks like it either got really
> hot or maybe lightening, not sure. Attached pic of apparent hot spots.
> This is a pair of FT240 toroids glued together with teflon wire pairs etc.
> Balun choke,  not unun.

No attachments on this reflector. Describe the visual evidence that it 
got hot. What core -- that is, what material? The only material I know 
of that's useful on HF is Fair-Rite #31. Is the core cracked? What is 
the transmission line used to wind it? Coax? Exactly what coax? Two-wire 
line made from two insulated conductors? Magnet wires? Do you see any 
evidence of arcing, or insulation overheating?

73, Jim K9YC