im ny life i have never been is a quieter radio location than rarotonga! mike w7dra
On Wed, 13 Aug 2014 09:47:06 -0400 "Tom W8JI" <w...@w8ji.com> writes: > > this brings back a lot of memories..........i arrived on rarotonga > a week > > after a French Dxpidition did, who was set up in the K2KW motel > room with > > vertical antennas on the beach just as you would imagine. the > motel > > management said she was sorry, and set me up in a cottage (from > the same > > motel) on the other side of the island for me and my venerable > HW-16, now > > connected to a 400 foot long wire to a 100(?) foot high palm tree. > i was > > across a road to the beach (75 feet from the shore?), but could on > 160m > > easily hear the USA 579 two hours before sunset > > Receiving is virtually always a matter of signal-to-noise ratio in > the space > around the antenna. The only cases where more antenna efficiency > helps is > when the external signal **and external noise** is so weak it is > near system > internal noise. > > High conductivity earth can actually hurt S/N ratio because it > extends > ground wave far more than it changes higher angle signals. > > Transmitting is a different story, if lower angles are used. I > doubt, > however, it is ever close to 10-20 dB unless it is groundwave > propagation. > I'm sure people somewhere have actual numbers on that. > > 73 Tom > > ____________________________________________________________ 4 Fish to Never Eat Click to Learn 4 Fish to NEVER Eat (avoid these like the plague!) http://thirdpartyoffers.juno.com/TGL3141/53eb89438fbe8943498dst04vuc _________________ Topband Reflector Archives - http://www.contesting.com/_topband