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ANTENNAS

  282 Foot Delta Loop SkyWire Horizontal

24 ft high 160-80-40-30-20-17-15-10-12-10-6 METRES SSB



This 80 meter delta loop is actually 86 meters, or 282 feet of 1.5mm polyweave
antenna wire and allmost invisible to the eye hence me plotting it out with a
black line on the photograph. This is a little long for 80, 17 and 12 meters, but
 a little short for 40 and 30 meters and just right for 20, 15 and 10 meters. If we
 make the loop much longer or shorter, we would end up with the antenna being
 unsuitable for some of the bands. At this length, it is a good compromise for all
 of the bands. In practice, the shape of the loop will be determined by the location
 of good supports for the loop. The shape of the loop is not critical at all, my loop
(Delta) is a regular triangle and it seems to get out fine

 Delta (uppercase Δ, lowercase δ or 𝛿; Δέλτα Délta; Modern Greek [ˈðelta]) the fourth letter of the Greek alphabet.

33FT 1/4 Wave
40 Meter Vertical
 34FT high 80-40-30-20-17-10-12-10 METRES for SSB 4 x 34ft radials.



HyEndfed 5 band

 20 ft high 80-40-20-15-10 METRES for DATA


The antenna can be seen as a dipole except that the feed point is placed at the end
 of the wire. This dipole has three physical points to consider are the ends and the
 supply line. It is a resonant antenna. There is no grounding or counterpoise needed.
 For the entire 15 meters needs a tuner.The antenna is a complete half wave
for 40 meters till the coil. The wire portion between the matchbox (with Balun 1:9)
 and the coil is active for 40, 20, and 15 and 10 and aligned after the coil is only active.
Resonance frequency range is between 3600 kHz and 3700 kHz..

Diamond V2000 Antenna
The Diamond V-2000 triband base antenna operating on frequency bands 6m/2m/70cm
utilises a linear phaseshift design to couple the different frequency band selections together.

INTERPRETATION OF SOLAR DATA
“A” INDEX
 1-6 Best, 7-9 Fair, 11+ Bad
(Represents overall geomagnetic condition of the ionosphere over a given 24 hour period)

“K” INDEX
0 or 1 Best, 2 Okay, 3+ Bad, 5 Very Bad
(This is the overall geomagnetic condition of the ionosphere
averaged over the planet over the past 3 hours.
 K index indicates geomagetic storms. Below 10 MHz,
K of 5+ increases noise level appreciably, K of 7+ degrades HF significantly
)

SFI
 70 Not Good, 80 Good, 90 Better, 100+ Best
(SFI is the Solar Flux Index and is a measure
of total radio emissions from the sun)


 Higher Solar Flux generally suggests better propagation on
 the 10, 12, 15, 17, & 20 Meter Bands.
Solar Flux rarely affects the 30, 40, 60, 80, & 160

    Generally, propagation conditions are best when the A index is 10
 or lower, and the K index is 3 or lower.

    SFI Solar Flux Index: When >70 then 20m opens.
 When > 90 then 15m opens.
    X-Ray : Solar X-Ray emissions will cause shortwave fadeout.
 Classification from weak to strong X-Ray emissions : A, B, C, M, X
    During a solar X-ray outburst, the lower frequencies are the first to suffer,
 with subsequent fading up the frequency spectrum over a short period
 (usually less than a hour).
Signals crossing daylight paths will be the most affected
(obviously as X-Rays come from the sun).


HeyWhatsThat Path Profiler


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