Some numbers I keep having to look up / know.

The following numbers are from samples of what I have, not general rules.

• Bulkhead N connectors max diameter: ~ 22mm, for one I measured.
• N plug max D: 21mm. (samples: 2)
• PL259 max D: 21mm.

• Grey 8db (paradar?): 28.65mm
• RAK 5.8db: 28.5mm
• ML&S 5.8db: 29.40mm

Carbon fibre pole, 1m: 25mm OD, 1mm wall thickness, feels more than strong enough for an aerial.

Hyperflex 10 - Messi and Paoloni Coax Cable

Loss < 13.4dB / 100m. Probably around 12.6dB, interpolating their data sheet.

They claim it is just a touch better than LMR-400, although a random youtuber tested them and found the loss on the Hyperflex to be much more than specced, and the LMR-400 to be closer to its datasheet.

Hyperflex 5: ~ 24dB / 100m insertion loss. So looks quite usable for a connection to a masthead radio.

N connector loss: probably around 0.15dB. SMA similar. ~0.1 to ~0.2dB.

Hyperflex 10 datasheet