I goofed with those gain numbers. Forgot to do the average gain test in
EZNEC. The program was making big errors due to too many segments.
The real answer is that there is only 2.4 dB less gain for the
horizontal loop.
Jerry, K4SAV
On 9/30/2016 9:50 AM, K4SAV wrote:
A small loop mounted horizontally will be omnidirectional, mostly
horizontally polarized and with a null overhead. An omnidirectional
antenna isn't usually a very low noise receiving antenna. The gain
will drop by a lot if the antenna is at low heights. A square loop 5
ft on a side placed horizontally at 10 ft above average ground should
have a peak gain of about -44 dBi at 44 degrees elevation on 160
meters. The same loop mounted vertically with the top of the antenna
at 10 ft (either apex up or top flat) should have a gain of about -25
dBi.
Jerry, K4SAV
On 9/30/2016 8:03 AM, James Rodenkirch wrote:
I have a 160 meter rcv loop - kc2tx product - I want to employ this
season.
I don't have a lot of band noise here in s/w Utah and don't want to
bother with a rotor so....can I mount the loop in a horizontal
configuration and expect some improvement in rcv signal strength? I
seem to recall Tom, W8JI, cautioning me to ensure I have the loop
perfectly level. I do have a kd9sv preamp to employ and the Zo at the
antenna is 50 ohms (verified on my Autek ant analyzer) so I can use
50 coax for the feedline.
Thanks, in advance for any 'advice' or reaffirmation I am on solid`
ground here.
72 de Jim Rodenkirch K9JWV
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