[50mhz] 6m Point-to-Point Distances?

[Trent Fleming]

Lance,

Thanks for the information.  In the 60s, as a child, I remember my father
being involved with the American Red Cross as a volunteer.  They gave many
of those volunteers old Military Surplus radios (large walkie talkies) that
operated around 49-50 mc.  Dad was never very successful communicating more
than a few miles, even when outdoors.  Obviously, ERP and antennas would
have helped.

73,

Trent
N4DTF

On Mon, Mar 2, 2015 at 1:42 PM, Lance Collister, W7GJ <w7gj at q.com> wrote:

> Hi Art,
>
> D layer scatter signals on 6m are quite reliable for paths in the 600-1100
> mile range between well equipped 6m stations.  That is one of the special
> characteristics about propagation on the "Magic Band" ;-)  That is why you
> often see reports of QRO stations with high gain antennas being received
> regularly by stations that far away.  There is an ERP threshold, though,
> below which such signals are not audible, which is why it is not at all
> unusual for barefoot stations to be unable to answer big stations they hear
> on this propagation mode.
>
> When JT65 was introduced, I was curious to know if its extra sensitivity (
> 10-15 dB compared to CW) could be used to "level the playing field" between
> big stations and barefoot single yagi stations.   I ran some skeds with
> stations 700 - 1200 miles away and found that we could very easily and
> repeatedly complete JT65 contacts with each of us running under 100w and a
> single yagi.
>
> GL and VY 73, Lance
>
>
>
>
> On 3/2/2015 7:12 PM, Art Roberts wrote:
>
>> Back when I was first licensed (1960) and started working 6 meters, I was
>> living outside Denver and South of the National Bureau of Standards. The
>> Bureau was working on  a project that ran at 49.5 MHz  They had eight 5
>> element yagis at around 30 feet, all lined up and aimed at a station
>> outside
>> Chicago, that had the same setup. They were investigating tropo scatter,
>> and
>> if they could maintain constant contact with a KW station and this antenna
>> setup. From my memory, it seemed to work as hoped. We could hear the
>> Chicago
>> station occasionally with our limited antennas.
>>
>> I think my 72 year old memory has this right.
>>
>> Art
>> W1AER
>> Tariffville, CT
>>
>>
>> -----Original Message-----
>> From: 50mhz [mailto:50mhz-bounces at mailman.qth.net] On Behalf
>> Ofqrv at kd4e.com
>> Sent: Sunday, March 01, 2015 6:52 PM
>> To: 6m;6meter at yahoogroups.com
>> Subject: [50mhz] 6m Point-to-Point Distances?
>>
>> Questions:
>>
>> What's a reasonable expectation of 6m mobile-to-mobile direct
>> communications
>> @ 25w - 50w?
>>
>> How does that change if one station is fixed and the antenna is at 30-35'?
>>
>> What about two fixed locations w/antennas both at 30-35'?
>>
>> I've read about repeaters using 6m as a backbone but what about control
>> signals and/or digital modes, must that be at 220 or higher?
>>
>> I used to know this stuff but you know, lack of use, and all that ...
>> surely
>> not age!  ;-)
>>
>> Thanks - David KD4E
>>
>>
>>
>
> --
> Lance Collister, W7GJ
> (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ, E6M,
> TX5K, KH8/W7GJ)
> P.O. Box 73
> Frenchtown, MT   59834-0073
> USA
> TEL: (406) 626-5728
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> URL:http://www.bigskyspaces.com/w7gj
> Skype: lanceW7GJ
> 2m DXCC #11/6m DXCC #815
>
> Interested in 6m EME?  Ask me about subscribing to the Magic Band EME
> email group, or just fill in the request box at the bottom of my web
> page (above)!
>
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-- 
Trent Fleming


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