[NLRS] PSK31 on 2m SSB

[Dan Larson]

I'll be on tonight sometime after 8:30pm tonight if anyone wants to try 
a "local" contact on PSK31 or maybe not so local within 150
miles of Hastings, MN (EN34nr).

Email me with location / freq. if interested...

Dan


On Wed, 31 Aug 2005 19:00:39 -0500, Bud Patten wrote:

>
>
>
>Subject: RE: [NLRS] PSK31 on 2m SSB
>
>
>Don, your recollections are as good or better than mine.  Rapid airplane
>flutter was indeed evident on the waterfall display that apparently was
>messing up the copy.  Maybe we should fire up PSK31 again one of these
>evening or perhaps some of the newer modes and see what happens.
>
>73,
>Bud
>
>-----Original Message-----
>From: nlrs-bounces at mailman.qth.net
>[mailto:nlrs-bounces at mailman.qth.net]On Behalf Of Baker, Donn B
>Sent: Monday, August 29, 2005 12:34 PM
>To: Northern Lights Radio Socie; Dan Larson
>Subject: RE: [NLRS] PSK31 on 2m SSB
>
>
>
>
>Several years ago, W0LCP and I ran a few experiments on 2m and 432 w/PSK31.
>Not a great distance, only about 30 miles.  We ran "low power", 10w or so,
>at each end. I'm running a 13 el CC on 2m and a modified CC417 on 432
>(trigon removed)  Each has about 60 feet of 9913 coax on it.  Don't know
>Bud's station has for antennas.  We can work each other FB on 2m.  Once in a
>while on 432, its difficult.  Power at each end helps.
>
>We ran PSK31 with no trouble on 2m.  Solid copy.  We finally got around to
>doing 432, and it, too worked with no problem.  Until....  Second or third
>night we worked on 432, copy was terrible!  No better than 20-30%.  It would
>come and go.  Eventually, I noticed "patterns" in my reception of Bud's
>signal. In the waterfall, the signal strength would go up and down.
>FINALLY, I also heard airplanes overhead.  With no airplane noise, good,
>solid copy.  WITH airplanes in the area, no copy to (at best) poor copy.
>Multipath off the airplanes
>
>We didn't switch to 2m and try... didn't think of it.  Most likely there
>were similar results there, but maybe not as pronounced.
>
>Maybe Bud has better recollection (records ?) than I do.  Bud ?
>
>73 Donn
>WA2VOI/0
>> -----Original Message-----
>> From: nlrs-bounces at mailman.qth.net
>SNIP
>> Sent: Monday, August 29, 2005 11:45 AM
>> To: Northern Lights Radio Socie
>> Subject: Re: [NLRS] PSK31 on 2m SSB
>SNIP
>>
>> Andrew T. Flowers, K0SM wrote:
>SNIP
>> >
>> > There's an issue with PSK at VHF that many folks from HF experience
>> > don't consider.  Starting around 2m you'll find that multipath
>> > propagation causes phase distortions well beyond the 31.25 Hz
>> > bandwidth of PSK31.  This is simply because the scattering
>> media are a
>> > significant percentage of the wavelength in terms of their physical
>> > size.
>SNIP
>> > Andy K0SM/2
>>
>>
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