[600MRG] Another antenna comparison test...

[Frank Lotito]

Excellent!  A few questions to help bring me up to speed on your comparative tests:  (1) Have you verified that the bandwidth and sensitivity of both different transceivers' receivers is identical enough as to not bias the results? (2) I assume you listened for WSPR signals simultaneously? That is setup #1 and setup #2 were listening at the same time such that fluctuating propagation conditions did not bias the result?  (3) How did you verify that antenna setup #1 and antenna setup #2 were not "interacting with each other" as not to make for some sort of directional array that would bias the result? Last question - WSPR 4 software?  Is the K1JT WSPR software at revision 4, and if so, where do you get a copy?
73 Frank K3DZ / WH2XHA

> From: w0yse at msn.com
> To: 600mrg at w7ekb.com
> Date: Mon, 27 Apr 2015 10:54:24 -0700
> Subject: [600MRG] Another antenna comparison test...
> 
> This is the second comparison between two of my antennas as receiving antennas on 80 meters: 
>  
> On 26-27 April, 2015, I did another test between two receiving antennas on 80 meters using the WSPR 4 software.
> 
> 1) My 40 foot top loaded VERTICAL was fed to the FT100d transceiver thru an LDG auto tuner. There are three top wires of 25' each, sloping at ~45 degrees from the mast which makes it similar to a 1/4 wave on 80 meters. This antenna is the MFJ2990 with its 4:1 balun at the base. 
> 
> 2) My
>  40 meter OCFD* fed to the FT857d transceiver was also tuned to 80m thru an identical LDG auto tuner. The OCFD is drooped over the 17' peak of the roof
> with the majority of the middle half of the wire running N/S, while the peak of the roof runs E/W. This antenna is half as long as it should be for 80 meters, besides being handicapped by the fact that it is laying on the shingles of the roof, and at only 17' at its highest part.
> In a 12 hour period overnight the VERTICAL decoded only 182 spots while the OCFD decoded 203 spots. The OCFD won the battle in spite of its above mentioned handicaps.
>  
> I am now planning to use the OCFD as a receive antenna whenever I want to use the vertical to transmit with. This should give me the best results on both transmit and receive.
>  
> 73, 
> *´¨)
> ¸.•´¸.•*´¨) ¸.•*¨)
> (¸.•´ (¸.•`   Neil Klagge, w0yse
>  
> *OCFD = Off Center Fed Dipole (sometimes called a Carolina Windom since it is fed at the 200 ohm point on the wire and fed thru a 4:1 balun)
> 
> 
> My Faith website: http://neilsfaith.webs.com/
> My ham radio websites: http://w0yse.webs.com/ and http://wg2xsv.webs.com
> 
> 
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