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locked Mystery Station #WSPR #band 630 meters #WSPR #band
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Joe Hobart
A station is transmitting WSPR type signals at 475.690 (1490 on waterfall) that I am unable to decode. The signals appear to have correct WSPR timing, but there are signs of over or excessive modulation. The signals are especially strong around sunset and sunrise when other signals have disappeared or have not yet appeared.
Receive location is Flagstaff, north-central Arizona, DM45. Is there a way to identify such a station or get an idea where the station is located for possible contact? This station possibly transmits 24/7 - at times every other 2 minute WSPR segment, although this varies. Thanks, Joe, W7LUX, Flagstaff, Arizona
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I love a good mystery. I assume that mapping programs can’t decode the signal either? Only way I know then would be to get two or more azimuth readings and triangulate. If it is in Area 51 do let us know.
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I will pass this on to a friend in Prescott, Art KG6AY. 73 Bob KN6UXD DM13
On Dec 5, 2022, at 11:41 PM, Joe Hobart via groups.io <jrhobart@...> wrote:
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Joe:
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I see on the Wikipedia entry for "630-meter band" that "amateurs have experimented with weak-signal radio communication near 474.2 kHz, utilising WSPR <https://en.wikipedia.org/wiki/WSPR_(amateur_radio_software)>." It is also reorted there that: "In the United States, the Federal Communications Commission approved allocating 472–479 kHz on a secondary basis to the amateur service, in a report and order released on 29 March 2017. Amateurs wishing to operate on the band will need to notify the Utilities Technology Council (UTC) and be separated at least 1 km (1000 yards) from electric transmission lines that carry power-line communication (PLC) signals that use the same band. The maximum EIRP is 5 watts with the transmitter output power not exceeding 500 watts PEP. CW, RTTY, data, phone, and image emissions are allowed. The first US amateur stations activated the band on Friday 13 October 2017." Perhaps you should check with the Utilities Technology Council and see whether they have received any notifications for Arizona? Their website is utc.org <http://utc.org/>. Scanning their website It seems that they are heavily invested in radio communications and while I hope that I am wrong, they may view amateur radio as thorn in their side, so be guided accordingly. Here is a contact point that may be a place to start: Rob Thormeyer, Senior Director of Communications and Advocacy Email: Rob.Thormeyer@... 73 Bob Rose robert.rose@... KN6UXD DM13ld
On Dec 5, 2022, at 7:07 PM, Joe Hobart via groups.io <jrhobart@...> wrote:
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M0PWX
There is other modes on that band like FST4W
The clue is normally if you watch the waterfall the signal lasts longer than the normal 2 minute WSPR cycle The time periods are 120, 300, 900 and 1800 seconds Once you have the correct time slot give it a go Peter M0PWX M0PWX Grabber Page (qsl.net)<https://www.qsl.net/m0pwx/grabbers.htm> From: Robert Rose via groups.io<mailto:robert.rose@...> Sent: 06 December 2022 08:35 To: main@WSJTX.groups.io<mailto:main@WSJTX.groups.io> Subject: Re: [WSJTX] Mystery Station #WSPR #band 630 meters I love a good mystery. I assume that mapping programs can’t decode the signal either? Only way I know then would be to get two or more azimuth readings and triangulate. If it is in Area 51 do let us know. I will pass this on to a friend in Prescott, Art KG6AY. 73 Bob KN6UXD DM13 On Dec 5, 2022, at 11:41 PM, Joe Hobart via groups.io <jrhobart@...> wrote:
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Alan G4ZFQ
On 06/12/2022 09:32, M0PWX wrote:
The clue is normally if you watch the waterfall the signal lastsPeter, Bob. The exact TX periods are given in the manual 17.2.10. Summary. FST4W-120 is actually 1.3 seconds shorter than "2 minute" WSPR. 73 Alan G4ZFQ
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Joe Hobart
Mystery solved: the 630 meter station I had not been able to decode is W7IUV in
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central Washington. Lawrence has a great signal in northern Arizona. I am unfamiliar with FST4W, and it had not occurred to me there are other modes with the same time signature as WSPR. Thanks to all for your comments and suggestions. Joe, W7LUX
On 12/6/2022 2:32 AM, M0PWX wrote:
There is other modes on that band like FST4W
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Joe Hobart
Mystery solved: the 630 meter station I had not been able to decode is W7IUV in
toggle quoted messageShow quoted text
central Washington. Lawrence has a great signal in northern Arizona. The transmission decoded as soon as I selected FST4W mode. I am unfamiliar with FST4W, and it had not occurred to me there are other modes with the same time signature as WSPR. Thanks to all for your comments and suggestions. Joe, W7LUX
On Tuesday, December 6, 2022, 4:27:19 AM MST, Alan G4ZFQ <alan4alan@...> wrote:
On 06/12/2022 09:32, M0PWX wrote: The clue is normally if you watch the waterfall the signal lastsPeter, Bob. The exact TX periods are given in the manual 17.2.10. Summary. FST4W-120 is actually 1.3 seconds shorter than "2 minute" WSPR. 73 Alan G4ZFQ
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