This is from Gordon’s estate (W3GK) two years ago but never listed. The loop was probably used as a delay line — 1/2″ diameter — can be straightened out and used as feed line. Dave has it checked out with a NanoVNA analyzer — 50 ohm line with 50 ohm BNC connectors. Has a flat SWR up to 900Mhz. Asking $.35 per foot.
Contact Paul at firstname.lastname@example.org