RFzero a way to do WSPR on 144 MHz and above

[Bo, OZ2M]

Hello group

If you are looking for a way to do cost effective WSPR on 144 MHz, or above for that matter, the RFzero may be just the solution you have been looking for:http://www.rfzero.net/ You may even tweak the open source code or write it yourself if you like.

73

Bo, OZ2M

[AB7RU]

This looks very cool, I am interested in getting a beacon going on 2 mtr WSPR here in Spokane WA. thanks for passing this along.

Mike AB7RU

[Bo, OZ2M]

Hello Mike

We will be happy to help you in getting on the air in a smooth way. If you connect the RFzero to e.g. a RA30H1415 power module from Mitsubishi (RF Parts in CA.) you will have a nice 25 W beacon.

We have A LOT of beacon experience from operating the OZ7IGY beacons: www.oz7igy.dk and from developing the Next Generation Beacons platform:http://rudius.net/oz2m/ngnb so you will be in the best of hands.

Bo

[Bo, OZ2M]

Both Warren, WA8TOD, and Steen, OZ5N, can now confirm that the RFzero can be used on 23 cm for WSPR with 100% decodes with reference locked receivers. However, there has been no success on 13 cm.

[n3...@aol.com]

Send me one and I'll test it for you.

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[Bo, OZ2M]

Hi Chris

Steen, OZ5N, uses the LimeSDR https://myriadrf.org/projects/component/limesdr/ that is good up to almost 4 GHz so RX-wise it is not a problem after it has been reference locked and he may also use his 10 GHz setup. Warren, WA8TOD, has a mixer to SDR solution that at least in theory can go a bit above 4 GHz:

https://groups.io/g/RFzero/topic/rfzero_test_bed/31760721?p=,,,50,0,0,0::recentpostdate%2Fsticky,,,50,2,0,31760721

https://groups.io/g/RFzero/attachment/94/0/System%20diagram.png

At 10 GHz (RFzero at 108 MHZ and a Kuhne x96 multiplier) PI4 decodes smoothly.

But it has to be kept in mind that the RFzero uses the Si5351A so it is still quite an achievement.

Bo