[ADXA] RX Antennas - What's in Your Station??

[BILL KENNAMER]

 My two cents: The primary reason for using a separate receive antenna on the low bands is to cut noise and, maybe, add directivity. It should not be expected that a receive antenna will automatically provide better signal strength. It usually won't do that. The objective is to provide a better signal to noise ratio, and most will do that. If you compare the noise between the RX antenna and TX antenna, you should be able to tell a difference. Intelligibility is what makes the difference. For example, my YCCC system provides less signal strength, but makes the difference in whether I can hear the signal well enough to copy my call/his call correctly. My system uses pre-amps at each antenna, plus I pre-amp it at the receiver as well. Sometimes the signal strength is equal, mostly not, but I can tell a big increase in intelligibility, and I find that I can hear clearly things that other callers can't hear. This is especially true on 80M, where I often hear EU stations very early in contests, and am able to work them before there are any other callers at all.
You can also find big variations from night to night. Sometimes polarity, angle, and propagation levels change. So, it is best to evaluate RX antennas over a period of time. If you can see directivity, keep it, it's working.
Bill K5FUV

    On Monday, January 13, 2025 at 09:37:52 AM CST, Charles Korzendorfer <korzendorferc at gmail.com> wrote:  
 
 Guys,    So I have been struggling with a K9AY loop array for a few years.  I had it installed in my back yard for two winters, but very dissatisfied with the performance.    This year I moved it to my front yard in an effort to get it further away from the tower.  Used it last Saturday in the NAQP, & no improvement.  I am convinced it is just to close to my tower to work properly.  Bottom line for me is if you can hear better on your transmitting antenna, it is not working.  Back to the drawing board for me on this project.Chuck. KM5G 
On Mon, Jan 13, 2025 at 9:02 AM <w5znjoel at gmail.com> wrote:


Greetings ADXA Folks,

 

Randy, ZJ, peaked my interest this morning about what RX antennas (with good observations on performance) and what is being used among the ADXA folks. Randy is using a Pennant, Dennis RZ is in the process of putting up a loop or Pennant, EJ and UR have Beverages. Stan GO has a YCCC-9 down in Cayman Brac and Bill FUV had a YCCC-9 at one time.

 

For others who have a low band RX antenna, what are you o you have???? Inquiring minds need to know!

 

73 Joel W5ZN

 
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