[Elecraft] XG3 6M beacon W7RDP/B on the air

[Geoffrey Mackenzie-Kennedy]

Not an expert Wayne, but earned my $ calculating path loss at HF up to 
microwave during point-to-pont, mobile and relay systems design "back then" 
using the classic 4/3 Earth Radius approach at VHF-Microwave. Unfortunately 
my relevant data is packed, but I understand that the path between Kevin and 
Doug is about 150 miles. So in spite of the elevation of Kevin's QTH, at 50 
MHz the path would not appear to be true line of sight but Fresnel Zone 
obstructed, which together with any loss added by local obstructions such as 
dense tree growth and buildings could put the beacon's signal below Kevin's 
noise floor.

73,
Geoff
GM4ESD


On June 21, 2011 at 23:40 Z, Wayne Burdick wrote:

> Do we have any experts at path-loss calculations (over typical
> Seattlian terrain) on the list?
>
> Wayne
> N6KR
>
> On Jun 21, 2011, at 3:34 PM, Kevin Rock wrote:
>
>> I should be line of sight to Seattle.  I know I am south of it and
>> he is using a gain antenna.  Do you think he will reach beyond the
>> outskirts of Seattle?
>>   Kevin.
>>
>>
>>
>>
>> On Tue, 21 Jun 2011 15:26:00 -0700, Wayne Burdick
>> <n6kr at elecraft.com> wrote:
>>
>>> Also, at 0 dBm power output, his XG3 may only be audible to fairly
>>> close stations unless there's a serious band opening.
>>>
>>> Wayne
>>> N6KR