Sorry - I should have provided more info. I'm trying to assess the impact
of this TX antenna on the performance of some other receive antennas by
modeling the site. I am thinking I can get a somewhat valid prediction from
the model by adjusting the model height of the TX antenna to its actual
resonance. I just don't know if the tuning stubs will change the resonance
of the antenna itself? Does this sound like a valid methodology?
Thanks for any information & insight you can offer.
Matt
KM5VI
>> Matt,
>> I don't understand what you're asking. Stub matching is a good thing and
I use it on several of my antennas, but I don't understand what you're
trying to accomplish with the 50 ohm dummy load. The way to test your system
is to connect the feedline to a transmitter (or test instrument) with the
stub in place and measure the SWR in the shack.
>> 73, Jim K9YC
n Tue,12/13/2016 12:05 AM, Matt wrote:
> Hi folks - need some help. A shortened 160m vertical ground plane
antenna
> is cut and tested for a resonant frequency of 2.24 Mhz. The antenna is
> matched near perfectly to 50 + 0j ohms at 1.85 Mhz using a shorted
> coax stub of appropriate length placed at the appropriate location along
the feedline.
> With a 50 ohm dummy load attached to the station end of the feed line,
> will the antenna be resonant (ring) when externally excited at 1.85
> Mhz or 2.24 Mhz?
>
>
>
> Thanks in advance for any insight you can offer.
>
>
>
> Matt
>
> KM5VI
>
>
>
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