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doc, me and mm200 metal detect so we are well aware of soil composition and moisture content effecting radio waves and how it can change from field to field or over much smaller areas,

if cebik is correct about upper hf monopoles it implys that to make your 5/8wave 90 degree groundplane mounted at moderate heights perform at its best having a dominant lower lobe you need to be in an area with very poor soil conductivity,
better conductivity soil causes the higher angle lobe to dominate,

that may partly explain why MC sees the i10k pull ahead of others when hes testing antennas in the high desert,
it could also explain why eddie with his very good conductivity soil does not see the gains hed expect when testing his marconi against other antennas,
eddie has done a lot of testing recently with some surprising results that mostly fit what guys like cebik and w8ji claim.

<blockquote data-quote="bob85" data-source="post: 149755" data-attributes="member: 18">doc, me and mm200 metal detect so we are well aware of soil composition and moisture content effecting radio waves and how it can change from field to field or over much smaller areas,if cebik is correct about upper hf monopoles it implys that to make your 5/8wave 90 degree groundplane mounted at moderate heights perform at its best having a dominant lower lobe you need to be in an area with very poor soil conductivity,better conductivity soil causes the higher angle lobe to dominate,that may partly explain why MC sees the i10k pull ahead of others when hes testing antennas in the high desert,it could also explain why eddie with his very good conductivity soil does not see the gains hed expect when testing his marconi against other antennas,eddie has done a lot of testing recently with some surprising results that mostly fit what guys like cebik and w8ji claim.</blockquote>

[QUOTE="bob85, post: 149755, member: 18"] doc, me and mm200 metal detect so we are well aware of soil composition and moisture content effecting radio waves and how it can change from field to field or over much smaller areas, if cebik is correct about upper hf monopoles it implys that to make your 5/8wave 90 degree groundplane mounted at moderate heights perform at its best having a dominant lower lobe you need to be in an area with very poor soil conductivity, better conductivity soil causes the higher angle lobe to dominate, that may partly explain why MC sees the i10k pull ahead of others when hes testing antennas in the high desert, it could also explain why eddie with his very good conductivity soil does not see the gains hed expect when testing his marconi against other antennas, eddie has done a lot of testing recently with some surprising results that mostly fit what guys like cebik and w8ji claim. [/QUOTE]

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