[Elecraft] XG3 6M beacon W7RD

[Bill W4ZV]

Edward R. Cole wrote:
> 
> And I hope you realize that comparing 6m propagation to 80m 
> propagation is not fair!  Most likely the XG3 beacon on 50-MHz will 
> only utilize ground-wave prop.  There may be some tropo-scatter 
> effect but that is usually more enhanced higher into VHF/UHF.
> 

Hi Ed,

Having operated extensively on 10m (current USA SOSB/10 records in CQ WW,
ARRL DX and CQ WPX, both modes) and on 160/80m (DXCC 331/347 confirmed), I
can tell you it's MUCH more difficult on the lower bands.  One of the
primary reasons is the higher ambient noise floor due to both atmospheric
noise (lightning-induced) and man-made noise on the low bands (see the link
below).  Other reasons are the greater difficulty of achieving TX antenna
gain and RX antenna directivity.  These factors combined result in at least
a 20 dB handicap versus the higher bands (e.g. my 160m TX antenna has 5 dBi
gain versus 22 dBi for my 10m stack).   

I don't operate 6m but I understand QRP can propagate over long distances
when Es and F2 is good.  0 dBm to my 10m stack will easily reach W6 (or much
further) if conditions are right.  0 dBm to a 22 dBi antenna gives an ERP
equivalent to about 200 mW to a vertical and I've worked Europeans in
contests on 10m running those levels during the last cycle peak.

73,  Bill  W4ZV

http://www.ofcom.org.uk/static/archive/ra/topics/interference/documents/rsgb.pdf




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