I use both methods. The problem being in a residential neigbourhood is I
am surrounded by other homes, some with well grounded wire mesh
below stucco siding, then the usual myriad of neighbours attic + house
wiring, copper plumbing, then miles of single and 3 phase commercial AC
power, utility poles,
lamp standards, sloping ground, trees, miles of asphalt streets, concrete
and asphalt driveways, hundreds of metal cars. Miles of telco and cable
company lines.
And soon to be installed 5G network.... with ants mounted every
100-300 yards. One nearby home just installed a ton of solar panels.
Some homes are now installing
metal roofs.
How do you propose how to implement HFTA with the above ??? Loads of
clay below the pristine lawns too. Forget the lousy ground for a minute,
there is so much junk
in the nearfield, and farfield, how can any software even begin to factor
a fraction of these extraneous items? Same deal with nec2 and nec4.
Sure, the say proposed yagi, etc,
can be designed in free space.... then modeled above sloping... poor to
average ground. Good luck with trying to correlate software results
...with reality. Trying to compare
RX + TX signals with nearby hams is an exercise In futility. One night
Im louder, the next night, local buddy is louder. Change directions,
and it all changes again. Change bands,
and its a whole new ballgame. Huge differences in band condx, when
trying to compare with stations 100 miles north of me.
They have a sign up at NASA that sez...... one test is worth a 1000
opinions. Want to see how good your CM choke is, measure the RF
current with a clamp on RF ammeter in several
places on the coax, then again around the home and shack, plus misc
stuff. Then swap CM chokes, and repeat the test. Its a eye opener.
Later.... Jim VE7RF
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