Mag loops...? Mis named.? ?Resonant small loop.
They run about -12db on 40M for a soso one and maybe -10db for a good one
compared to a dipole at 40ft or more.? This is for a 1M diameter loop at 40M? ?
The problem is radiation resistance is so low and other resistance in the
build can be significant.? Go up in frequency? Efficiency goes up but 80% is peak
as then you get to effects of uneven current distorting the pattern.
However the better the loop is the more tuning required as the bandwidth is narrow.
good for spurs and all and compact but like all small antennas (less than 1/10th
wavelength) they are inefficient.?
Its advantage self completing antenna, small,? has good null that can
help with noise reduction.
Oh we had a CME hit Saturday turning the bands upside down.
Allison
