[RTTY] Screenshots of PropNet interference?

[Joe Subich, W4TV]

> The PropNet stuff is very narrow band (PSK31) and the bursts 
> are short (the message refers you to a web page rather than 
> passing a lot of actual data), so the likelihood of it actually 
> QRMing someone is somewhat low.

The individual message may be short but the cumulative effect of 
the dozens of beaconing stations is such that it does cause several 
QRM to DX stations working in the area.  This is particularly true 
when a DX station or DXpedition shows up on RTTY and works 
split "down." 

> PropNet is actually useful enough that they should initiate an FCC  
> petition asking for a small window that is dedicated for such  
> propagation studies.

Sure, put them on 10.14975 and cite any of them that have IMD 
products or drift out of the band. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: rtty-bounces at contesting.com 
> [mailto:rtty-bounces at contesting.com] On Behalf Of Kok Chen
> Sent: Monday, February 25, 2008 3:06 PM
> To: RTTY Reflector
> Subject: Re: [RTTY] Screenshots of PropNet interference?
> 
> 
> There are many screenshots on the web of Pactor III QRM, but 
> I haven't  
> seen one showing PropNet QRM.
> 
> The PropNet stuff is very narrow band (PSK31) and the bursts 
> are short  
> (the message refers you to a web page rather than passing a lot of  
> actual data), so the likelihood of it actually QRMing someone is  
> somewhat low.
> 
> PropNet is actually useful enough that they should initiate an FCC  
> petition asking for a small window that is dedicated for such  
> propagation studies.
> 
> Unlike Pactor III, there is no apparent monetary interests involved.  
> Seems to me to be just a bunch of amateurs who are playing 
> with radio  
> techniques, using openly available software and hardware that 
> both can  
> be homebrewed.
> 
> 73
> Chen, W7AY
> 
> 
> 
> On Feb 25, 2008, at 11:33 AM, George Henry wrote:
> 
> > I didn't say it was you, Bill...  it wasn't even someone from this  
> > group!
> >
> >
> > George
> >
> > -----Original Message-----
> >> From: FireBrick <w9ol at billnjudy.com>
> >> Sent: Feb 25, 2008 10:49 AM
> >> To: ka3hsw at earthlink.net
> >> Subject: Re: [RTTY] Screenshots of PropNet interference?
> >>
> >> I never said that.... I saw it on my screen but never took screen  
> >> shots.
> >>
> >>
> >> On 2/25/2008 10:10:14 AM, George Henry 
> (ka3hsw at earthlink.net) wrote:
> >>> Anybody got any screenshots of interference to an ongoing 
> QSO from a
> >>> PropNet beacon?  I took someone at their word when they told me  
> >>> that there
> >>> were examples on QRZ.com, and repeated their claim, without  
> >>> verifying it
> >>> first.
> >>>
> >>> Now I am being pressed to deliver on that claim...  :-(
> >>>
> >>> George, KA3HSW
> 
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