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

[Fred Jensen]

750 nautical miles is about 1,390 km.  Ships would occasionally report 
hearing us on MF beyond that, 5 KW and huge antennas helps, but we had a 
hard time hearing them beyond about 750 nm in the daylight, and it 
depended on the ship.  I remember hearing NMO [Hawai'i] in daylight a 
few times, very weak.

I have yet to actually hear any of the WSPR stations I'm logging with 
Joe Taylor's software, even using CW bandwidths.  I'm logging the same 5 
or 6 stations all night, sometimes with reported SNR's of -6 to -1. 
I've gotten up in the middle of the night to listen, I guess I just 
haven't gotten up at the right time, and I'm getting a little tired of 
it. :-)

I haven't done Wayne's MF/LF mods yet, that may help some.

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 5/6/2015 12:00 AM, Fausto Coletti wrote:

> 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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