Topband: Low Dipoles

[John Harden, D.M.D.]

I am all for multiple receiving antennas for 160..

I have:

1) Hi-Z 8 down by the creek.

2) Hi-Z 2 up on the hill.

3) BOG to NW going down the hill.

4) Waller FLAG on 40 foot boon (2 loops) at 95 feet on a TIC Ring Rotor.

     The Waller FLAG appears to outperform all of the others (especially 
when the polarization is horizontal).

     It works well on the long path. It was #2 from N4IS. 100 ohm 
Twin-Ax to tower base. Then 100 ohm to 50 ohm transformer

     with Times Microwave LMR-600 to shack.

73,

John, W4NU


On 12/14/2020 8:31 AM, Bill Tippett wrote:
> W3LPL wrote:
> "I've never found them to be more effective receiving antennas than Beverages
> or arrays of short verticals at sunset or at any time during the night"
>
> I have a inverted-V with apex at 100' and ends at 30' that I specifically
> put up for high angle conditions.  I also have a quasi-4SQ Tx antenna about
> 300' away.  The Eznec plot below shows the breakeven TOA is around 45
> degrees.  I usually see +10 dB in favor of the 4SQ which you can see on the
> plot happens at TOAs below 15 degrees.
>
> https://photos.google.com/photo/AF1QipM_OgfeUmNPr7fPJL2YApvxE5HaQbajJDfYlD-M
>
>
> Most (>99%) of the time what Frank says is true.  However there are rare
> occasions when the inv-V is stronger than the 4SQ indicating high angles.
> Normally I receive on Beverages and TX on the 4SQ but the tipoff to check
> for high angles is when Beverages lose directivity.  When this happens it
> indicates high angles, so I then switch to both TX/RX on the inv-V.  For me
> this most often occurs just after sunset and only lasts 30 minutes or so.
> However in contests I've had significant runs of deep z16 and even deeper
> stations which have significantly added to my points and mult totals.
> Sunrise also shows peaks but not as pronounced as sunset.  High angles can
> also occur during significant solar events but this is more rare than at
> sunset/sunrise.
>
> "You can never have too many antennas!"
>
> 73,  Bill  W4ZV
> _________________
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