Well, it's starting to look unrealistic unless I can get a model airship or one of those helium sharks (Kieth just suggested that as I write).
It might be possible to get a thinner shielded cable to save some weight. I agree the cable will be most of the weight as I'm only planning to hoist the antenna, the receiver will be at ground level.
I can't access the previous posts while I write but my thanks to the person who gave me the chemistry info, I believe his name is Bill.
But, flag pole or balloon, I'd really like to know if I can use an extension lead for my radio Tx antenna, I'm sure that would help improve the range. Anyone know if this would work?
John.
Location London.