Hi Bill

Well I quite happily ran a 6M loop inside a 15M one. Seperate feedpoints
etc. In my case I was trying to use the same mounting points (trees).

I didnt check how effective they were but the TX was happy and I spoke
to people on them!. Used 75r Q sections on each.

The 40 vs 80 might have some detuning effect on 40M and major pattern
change due to the harmonic relationship. You can always try modelling it..

Cheers Bob VK2YQA

Bill Cherepy wrote:

During a discussion of loops someone asked me if you can have a full
wave 40 meter loop inside a full wave 80 meter loop and I don't know
the answer. Anyone?