What about ribbon cable? I've got a fair length of ribbon cable
(something like 25 wires - the sort used in PCs to connect hard drives
and the like) put away for a rainy-day loop antenna project. While I
could make one large loop using all 25 wires for the really low
frequencies, I'll almost certainly cut it up and make several smaller
loops with fewer wires for the higher frequencies.
--
Ian- Hide quoted text -

Hello Ian,
I have used 16 core ribbon cable, with each core connected in series
for an AM broadcast band loop antenna. It was about 1 metre long in
circumference which gave me a total length of 16 metres. I used a
cheap tuning variable capacitor with a switch which connected another
capacitor to increase the total capacitance so I could tune down to
the bottom of the AM band. It is coupled through the internal ferrite
antenna in the radio. On my main tuner in the house, it has
connections for an antenna on the back, so I made another ribbon cable
loop antenna and put a single wire with it as a pick up wire. Each end
of the pick up wire is connected to the antenna inputs on the tuner. I
have made four of them. They are easily made, not too fiddly and they
work well. Cheers
Max