Multi Turn Magnetic Loop for 40/60/80
antenna is my version on 40/60/80 originally designed by HB9ABX
The challenge was
design the lightest possible antenna for a handheld operation
on the lower bands.
structure is made on airplane models wood and 5 mms aluminum
is used to the loop construction.
antenna has 85 CMS in Diameter, with a 17 CMS diameter excited
a three turn loop closed by a 100PF capacitor covering continuously
from 3.5 MHz to 8 MHz
is a portable loop that covers 80 meters with a high degree
of compromise. I have never opportunity to test on 60 meters.
I have had many interesting contacts on 40 and 80 meters.
compare this antenna performance with a dipole or a long wire,
but it is really fantastic cover this bands with a hand held
AHD ALEX (Alexandre Grimberg).