co phazing 2x 2 meter halo loops
 

hi i have one i would like to get another and co-phase them, how do i do
this (coax feed, distance between loops) and i want to run horizontal
thanks dave

multi-element horizontal omni

http://home.comcast.net/~ross_anderson/HOCollinear.htm



"DAVID BROWNE" wrote in message
...
hi i have one i would like to get another and co-phase them, how do i do
this (coax feed, distance between loops) and i want to run horizontal
thanks dave

"DAVID BROWNE" wrote in message
...
hi i have one i would like to get another and co-phase them, how do i do
this (coax feed, distance between loops) and i want to run horizontal
thanks dave

Cut two pieces of 75 Ohm coax, 3/4 electrical wavelength long ( about 38
inches for regular RG59). Connect one end of each to an antenna, the other
ends to a T connector. Connect 50 Ohm coax from third port of T connector to
radio; you will probably need a UHF F-F adapter to do this. Space the
antennas apart as far as the coax will reach. Anything less than 4 - 5 feet
is not worth doing. As I recall, one wavelength, 2 meter spacing, will give
almost 3 db gain.

Tam/WB2TT

"Dr Dave" wvdave1st @hotmail.com wrote in message
news:%OMMd.8825$Dc.4803@trnddc06...
multi-element horizontal omni

http://home.comcast.net/~ross_anderson/HOCollinear.htm

The spacing of these antennas is so close at to make it hardly worthwhile-
as Tam points out in a following post. For simple omnis, or dipoles, the
stacking gain peaks around 4'--5' at 2M. A first shot at modeling shows
that the gain increase from stacking 2 omnis at 27" is around 0.5dB-
assuming a lossless matching network.

Dale W4OP

Dale W4OP