[Elecraft] FCC Proposes to Permit Amateur Access to 2200 and 630 Meters

[Fausto Coletti]

Hi Fred,

Here in Europe on 630m, we often did groundwave QSO of 600-800 Km in the 
middle of day
and the whole route is over the ground, not over sea water with strong and 
stable signal.
Normally QSO between northern Germany and the central and southern Italy
During the night there may be a deep QSB due phase sum of groundwave and 
skywave especially at distances around 600-800 Km.
At distances below these prevails ground wave component, at greater 
distances prevails skywave.
I have not experience of groundwave QSO over the sea water, probably the 
efficiency is better than over the ground.
Here a video of groundwave reception:

https://www.youtube.com/watch?v=7sdXjyfibz8

Of course the signal is better during the night via skywave:

https://www.youtube.com/watch?v=LLkclDrrvOg

The distance between I and Stefan is about 600 Km.

73, Fausto IK4NMF

----- Original Message ----- 
From: "Fred Jensen" <k6dgw at foothill.net>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, May 05, 2015 11:30 PM
Subject: Re: [Elecraft] FCC Proposes to Permit Amateur Access to 2200 and 
630 Meters


> Many years ago, when 600 meters was the world's party line, ground wave 
> was usable out to maybe 700-750 nm [around 800 sm].  Ships ran 200 - 500 
> watts usually and were somewhat antenna restricted for that frequency. 
> Conversely, we ran 5 KW to very large, efficient antennas, and we had the 
> advantage of great Beverages for receiving.
>
> Of course, that was essentially a 100% sea water path too.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
> - www.cqp.org
>
> On 5/5/2015 12:21 AM, Edward R Cole wrote:
>
>> Antenna currently down by wind breakage (minor).  I support my inv-L by
>> two 50-foot towers separated 130-foot apart.  My signal is received
>> 70-mi away at 35 dB SNR by ground-wave 24/7/365.  Ground wave appears to
>> be solid out to 250mi.  Sky wave is night-time prop and best in winter
>> when atmospheric static is lowest.
>
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