Actually no reason to interfere in these discussions, but
as late as in 1960's, I unambiguously refused to believe that
measuring pure ground wave field strength can be so demanding,
(not to talk about pure single or mixed sky-wave component).
In the case below there appear to be several possibilities:
1. The "real EMRP" is not the same (very probable),
2. The "path loss" G3WSC/P-G3KEV is greater, ie so called
"effective electrical path conductivity" is smaller,
also, during winter time there is no "pure" ground wave
on a 300 km long (ground) path, not even during daylight,
the local path here: OH1TN-OH2LX (152km) is an example,
3. Mal's receiving installation has some "directivity",
4. Mal's "measurements" are not reliable enough (sorry...)
73 de Vaino, OH2LX
At 11:32 14.4.2000 +0100, Malcom wrote:
G3KEV- IO94SH ---------G3WSC/P- IO91XS--------AZ 175, DISTANCE 287.3 Kms
G3KEV- IO94SH -------- MM0ALM- IO87UA--------AZ 340, DISTANCE 320.8 Kms
MM0ALM is 2db stronger
de G3KEV/SCARBOROUGH.
So, if both MM0ALM and G3WSC were running 1W ERP, this
completely destroys the argument that higher antennas
always work better for the same ERP!
Mike, G3XDV (IO91VT)
http://www.dennison.demon.co.uk/activity.htm
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