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

Mon Mar 2 18:05:41 EST 2015

Problem with low band talkies or portables is lack of suitable ground plane for radiation efficiency. My first 6 meter portable was an old Motorola lunch box style with the base loaded whip on it. With maybe 2-5 watts out with GOOD batteries in it, it maybe maybe did 1-2 miles @ most and I was only day! Hooked to an outside antenna it covers a little farther but not much. Only during band openings do it really get out but then that's true of anything on 6 meters LOL
I do have a Ft 690R mark 1 and using its whip, I can talk 5 to 10 miles SSB  at most depending on the other station
Chris

On Mar 2, 2015 3:35 PM, Trent Fleming <trent.fleming at gmail.com> wrote:
>
> 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 
> > QTH: DN27ub 
> > 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 
>
>
> My blog on banking topics: 
>
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>
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>
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