The measure of a "good" antenna is how well it performs. When I lived in a
house with a lot bigger yard a few years ago I had a 40 meter vertical
full-wave loop antenna (~12 feet high and ~58 feet long). It had 5.5 dB of
gain over a dipole according to NEC2. It performed almost as well as a 40
meter Yagi antenna in its peak directions. It was the best 40 meter antenna
I have owned. I now live on a much smaller property and can't fit that
antenna in the yard. I have an MFJ 1796 vertical. It does "OK" on 20 meters
and higher, but I'm severely disappointed in its performance on 40 meters.
Maybe the other antenna spoiled me.
Zack W9SZ
On Mon, Jul 11, 2022 at 12:14 PM W0LEV <davearea51a@...> wrote:
Yes, indeed...... The measure of a "good" antenna is not SWR.
Of course, a 1:1 in a 50-ohm non-reactive system is essential to keep the
transmitter output stage happy, but does not measure how good an antenna is
at radiating the RF energy fed to it. Again,......SWR is NOT a single
proper indicator of a "good" antenna.
Dave - W?LEV
On Mon, Jul 11, 2022 at 6:34 AM olivier LAVAUX <f6cng.68@...> wrote:
be careful not to have a dummy load @swr1.1!
what is important is the radiated power! so not only check SWR but also
radiated electromagnetic field!
73
F6CNG Olivier
Le mer. 6 juil. 2022 ¨¤ 10:24, olivier LAVAUX via groups.io <f6cng.68=
[email protected]> a ¨¦crit :
Fitst check continuity before all with and without short circuit on the
antenna itself!
73 Olivier F6CNG
Le dim. 3 juil. 2022 ¨¤ 09:21, Lucian <lucian@...> a ¨¦crit :
Thanks, but you were too quick to dismiss the human factor..
It wasn't until this morning that I realised the antenna is rp-sma
female
and the nanovna is sma female.. They will screw in perfectly, yet no
core
contact... facepalm.
I'll need to buy some adapters.
Have a nice day!
--
*Dave - W?LEV*
*Just Let Darwin Work*
--
Dave - W?LEV
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