[Lowfer] WSPR on 600m => was: RE: 500 kHz-Graham Collins...

Thu Feb 23 12:18:03 EST 2012

Thanks Bob.

I will keep a closer eye on the postings. Trouble is I don't always get them as some postings get blocked by my ISP's firewalls or they arrive long after I have headed out of the radio room for the night. I try and guess what frequency might provide a decode but I have not been guessing very well.

Time to get a bit better organized I think.

Cheers, Graham ve3gtc

-----Original Message-----
From: lowfer-bounces at mailman.qth.net [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of Bob Raide
Sent: February 23, 2012 12:13
To: Bob Raide
Subject: Re: [Lowfer] WSPR on 600m => was: RE: 500 kHz-Graham Collins...

Graham;
No reason that you can't decode WSPR or for that matter any of the modes used on 500 band. 
There is allot of activity as of late on 500. It is a matter of finding a freq that we each can fit into without causing or receiving interference.  The propagation is such that at night there is both short [high angle] skip and the weaker DX. We can operate on a clear freq but if it is close [2-4 kHz] to a DX sigs overloading can occur and make the DX reception impossible. We have to co-operate with each other to make the band enjoyable and usable to everyone if possible. 
With that said, most all of us post a "dial" [and carrier freq sometimes] so reception can be easy and also notify the other ops of our intentions.
With WSPR as with some other programs used, a dial freq is given such as 498 kHz where I have recently found "safe". The 498 dial is used in the USB [2.7 bandwidth] and the carrier freq is actually 499.5 as it requires a SSB transmitter to accept the modulated [fsk] tone and with the 1500 hz tone into a ssb TX puts the carrier out at 499.5 +/- FSK.
These "spots" are usually posted through out early evening to signal where and what type signals are-Bob WE2XGR/6 [aka WE6XGR] NY

> From: CollinG at navcanada.ca
> To: lowfer at mailman.qth.net
> Date: Thu, 23 Feb 2012 11:39:03 -0500
> Subject: [Lowfer] WSPR on 600m => was: RE: 500 kHz
> 
> 
> Good day all,
> 
> I have been noticing the posts concerning WSPR on 600m. I frequently set up and monitor WSPR by frequency hopping including 600m but have never made a decode on 600m.
> 
> Up to now I have been using the default WSPR frequency of (I think) 502.400 USB) but I frequently see references to other frequencies that others are using. Point of note in the email below referencing 499.5. Is that 499.5 USB or center frequency? If that detail was posted I missed it.
> 
> Are others using "non-standard" wspr frequencies? Makes it hard to try and get decodes without spending hours in front of the radio hunting out the very signals.
> 
> Cheers, Graham ve3gtc FN25ig
> 
> 
> 
> 
> -----Original Message-----
> From: lowfer-bounces at mailman.qth.net [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of Bob Raide
> Sent: February 23, 2012 11:06
> To: Bob Raide
> Subject: Re: [Lowfer] 500 kHz
> 
> 
> JD;
> That's an interesting looking capture! When I first fire up this mode I listen to the signal on my receiver and swear sometimes that it is a bare carrier with a vfo that is ever so slightly unstable. That 10 hz of wiggle isn't much bandwidth. 
> Thanks-Bob
> 
> 
> From: listread at lwca.org
> To: lowfer at mailman.qth.net
> Date: Thu, 23 Feb 2012 09:49:35 -0600
> Subject: Re: [Lowfer] 500 kHz
> 
> I didn't spend as much of the night at 600 m as Garry did, but I did catch 
> WE2XGR/6, 499.5 kHz, WSPR (spectrum attached; even in the presence of S9 
> static in a 270 Hz bandwidth, the S9+ signal occupying less than 10 Hz of 
> that BW should not have been any challenge to decode halfway across the 
> continent, had I tried...there was a rather deep fade for several minutes 
> beginning about 0356, but levels recovered later); WD2XSH/6, 508.8 kHz, CW 
> (I'd hate to be the first report of interference from this operation...it 
> was mutual interference between /6 and the lower sideband of NDB OF, making 
> it very hard to hear either clearly); WD2XSH/7, 476.3 kHz, both CW speeds 
> and PSK31 (the only signal stronger than Bob's). Thought I saw QRSS on 
> 495.02, but couldn't identify it.
> 
> For some reason, the static down at 185 and 137 got worse here as the 
> evening progressed toward midnight, so that's when I gave up. In the 
> earlier part of the evening, I had both MP and NA at 137 until about 0241, 
> when somebody turned off the switch to Newfoundland. A few traces of signal 
> showed up later, but never enough to copy again, so it was only Mitch 
> thereafter.
> 
> Saw some traces of what should have been SIW and maybe WMS at 185.3, but not 
> enough for positive ID.
> 
> John 
> 
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