Topband: Location of WF RX Antenna. Need Expert Advice

W0MU Mike Fatchett w0mu at w0mu.com
Mon Jul 30 18:29:02 EDT 2018


Interesting.  My rcv array is probably 500 ft from the Xmit antenna or 
any antenna so I am probably ok?  My 70ft tower is 70ish feet from the 
160 inverted l.  I wonder if there is much to be gained by attempting to 
detune the tower.

W0MU


On 7/30/2018 10:44 AM, Pete Rimmel N8PR wrote:
> Joe,
>
> You might consider that there is interaction of the Waller Flag and 
> the other two towers as well as your transmit antenna while on receive.
>
> I suggest that you detune both of the other towers, as well as the 
> transmit antenna while using the WF on receive to eliminate them 
> re-radiating noise to the WF.
>
> Take a look at my YouTube video entitled:  "N8PR TX Antenna 
> Construction and Detuning effects on receive Noise"
>
> https://www.youtube.com/watch?v=sk6PVl7uaBM&t=257s
>
> I think that you will see that the detuning is worthwhile.
>
> 73,  PeteR  N8PR
> ----------------------------------------------------------------------
>
> 1. Location of WF RX Antenna.  Need Expert Advice
>
> {{I am hoping to construct a Waller Flag RX antenna on a 56' Heights
> aluminum tower for 80 and 160M RX.  The ideal location from aesthetic,
> RF and maintenance-of-a-civil -family-climate standpoints is midway
> (150' separation) between two existing LM-470 towers now separated by
> about 300'.  One has a 4-element Steppir and a 13-element 2M yagi on it
> and the other a 2 element 30/40M quad.  Obviously, the WF would not be
> used simultaneously as the two existing antennas, and the Heights tower
> would be well grounded..  Am I asking for a round of battles of trying
> to mitigate interaction problems on either TX or RX on any of the bands
> involved?  Would an easy answer to my question be obtained from an EZNEC
> simulation, especially since I already have models of the two current
> antennas?
>
> I suspect other people on this reflector have been here before. I'd
> appreciate any practical advice.
>
>
> Many thanks and 73,
>
> Joe
> K2XX}}
>
>
>
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband



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