Is an Inverted Vee inherently more susceptible to QRN than a dipole or yagi? My noise levels on 80m are much, much higher than my noise levels on 40m. I mean on the order of 6 or 7 S units higher. I'
Make sure you have a good current balun on the inverted vee so the feedline doesn't act as a vertical ( =noisy ) antenna. The only acceptable balun IMHO is about 15 turns of RG58 coax wound around a
An inverted vee is not more susceptible to QRN than a dipole. There are two reasons the QRN is worse on 80 meters than 40 meters. 1. Noise level is much higher on 80 than 40. 2. You have a two elemen
ORIGINAL MESSAGE: -- REPLY FOLLOWS -- I have to disagree, for two reasons: 1. An inverted vee has a vertical component of radiation, and man-made noise is predominantly vertically polarized, so an in
Just curious.. I've heard and read the assertion of "man-made noise being predominantly vertically polarized", but after some casual research, I can't find an original source of the data. Does anyone
That only assumes that the dipole is up high enough to matter - and to show the 2 typical lobes - this would have to be at least 1 wavelength - and more than likely, substantially higher - like 3-4 w
Author: "K8RI on TowerTalk" <K8RI-on-TowerTalk@tm.net>
Date: Sat, 4 Nov 2006 14:02:47 -0500
The question was about QRN (natural), not QRM (man made). However QRN is predominately vertically polarized and in theory the inverted - V would hear more. In practice I doubt the user would be able
Any inverted vee is a much better receive antenna that any vertical at my QTY. So at least at my QTH, it's just a fact. Now if I drive my mobile to a place with no power lines, the receive noise duri
I would agree that there's a lot of manmade noise about, it's the assertion that it's *predominantly vertically polarized* that I'm curious about. I would imagine that any antenna raised into the air
Local manmade noise may start out randomly polarized. However, only the vertically polarized component can propagate by ground wave. This is well known physics. The horizontal component is rapidly a
Excellent point.. OK.. So, given that surface wave signals MUST be vertically polarized, and that manmade noise is going to be propagating by surface wave, by the time it gets to you, it will be vert
An interesting discussion guys. I'm glad I was the one that provoked it. Some interesting and very good points were made. 1. A dipole has a larger null off its ends. 2. The vertical component of LOCA
These results suggest to me that in an urban environment where the noise is fairly isotropic (lots of small sources coming from all directions adding up non-coherently) that the dipole in general wil