"Jack Painter" wrote in message
news:L0xVb.15972$gl2.982@lakeread05...
Renzo, I'm sure members can answer your other questions I can't, but may I
ask why you would choose 1/4 wavelength "slopers" when a 1/2 wavelength
dipole (or several, as you planned) on the same tower would take up no
more
space, and probably significantly improve reception?
Jack
"Renzo" wrote
I would like to install 4 quarter wavelength slopers with different
directions on the same tower. Any questions:
a) Is it a fine idea to select one of the slopers through a relay box
located at the tower?
b) Is there a way to use the selected one like the driven element and
the
unused elements (3) like reflectors?
The fact is, is it possible to realize a parasitic electrically rotated
array using the quarter slopers instead of the
half wavelength (ARRL Antenna Handbook)?
Many thanks in advance for any possible infos about!
I have a 5btv vertical, it works fair but of course the bandwidth is very
narrow. The reason for using the vertical was because my tower blew down, do
the vertical was used out of necessity. After putting 60 feet of tower back
up, I ran a 1/4 wave slopper for 75, thinking it would work way better than
the vertical. It didn't. I couldn't tell a bit of difference. I thought my
noise level would be lower, it wasn't. The only advantage over the vertical
was the bandwidth was much better. So at that point I added another half to
the slopper to make it an inverted vee. That made a difference. Noise level
was 2 S-Units lower and signals both transmit and receive were at least 10
to 15 db stronger. I was really disappointed with the 1/4 wave slopper. That
is my experience with the antenna.
Dan Vitale
|