The Gypsy antenna looks quite loosy with only two real resonances. Those
being roughly 9 and 16.5 MHz. It hugs the outside of the Smith Chart which
indicates loss. Not a very good antenna in general.
Your long wire looks much less lossy with resonances at roughly 4 and 12
MHz.
With the lower resonance at 4 MHz of your long wire, it will be FAR more
capable of receiving AM BC and your time signal at 3.300 MHz. The Gypsy
antenna might be good for SWRing after Cycle 25 really gets going, but for
AM BC and 3.300 MHz reception, put it on the shelf for another three or so
years.
Dave - W?LEV
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On Sun, Nov 1, 2020 at 9:49 PM <deadman1966@...> wrote:
Hi All,
I am a new owner of the nano vna and i am not really sure how to read the
results of the plots.
Originally i had just strung up a random wire between my garage and back
fence and i have
since been playing with a Gypsy antenna i ordered off alliexpress.
Ant1 is the gypsy unit and i should note that i don't have the feed point
exactly center so its more like an offset center
feed at the moment
Ant2 is my end fed random wire
For Ant1 the antenna has a 1:1 balon connected to the 2 wires of the
antenna and i have 50ft of rg58au between that and the radio
For Ant2 i have a random wire with the center conductor of a piece of coax
attached to the wire and the shield of coax is connected to a copper ground
rod outside
here is what i don't understand
with Ant2 i can hear a time signal at over 9 s units on USB at 3.330.00
Mhz and i can hear all my local AM radio stations loud and clear.
with Ant1 i cannot hear local AM stations at all and can just barely hear
the time signal at the freq above.
My rig is TS-440s
Is it possible i messed up the connectors on the coax, i would have
expected the new ant to preform better but is does seem to be way worse
than a random piece of wire.
In both case the wires are about 50 to 60 feet long and only running about
6 ft off the ground.
Can someone explain the data in the pictures is there any info in it that
would tell me why the gypsy cannot even receive a local AM station i would
have though it would at least do as well as the random wire which is just a
length of 12v power wire that is stranded that i had in my junk box.
I can provide more info in need any help would be appreciated
73 de VE3SJK
--
*Dave - W?LEV*
*Just Let Darwin Work*
