开云体育

I have the U3S, QCX+ (40M), and a QDX (currently the WSPR beacon on
60M for VE8TEA). And their are other makes and models of WSPR
beacons. Likely at my own expense I'm looking set up a couple of
amateurs in VE8 (and maybe FP) with 60M WSPR beacons (TX only, XCV with
an internet connection where possible).

As an experienced builder kit form is acceptable and likely cheaper.

What model, or model plus SBC such as the Raspberry Pi series, is
recommended for this use?

Ron VE8RT VE8TEA FP5EK

--
Ron VE8RT <ve8rt@...>

Also don't forget the rfzero, just add a 1w amp.
I have used both a U3s and the rfzero and the latter unit is definitely better.
Andy.
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

Thank you Andy,

this is very interesting as it is a solution to another project I
wanted to do, remote VHF and UHF beacons for antenna evaluation.

As I'm very very stretched thin wrt to time (other commitments
related to amateur radio) plus the challenges of getting parts and
materials here I would have to rely heavily on the support community to
get this working in short order.

I did not see a receiver/decoder option, not yet, after a cursory
look at the RFZero website.

This should work with the QRP labs 5W amplifier and LP filters I
hope.

Ron .... no need to re-list the callsigns :-)

On Sun, 04 Feb 2024 10:28:01 -0800
"M0RON" <eustace.andy@...> wrote:

Also don't forget the rfzero, just add a 1w amp.
I have used both a U3s and the rfzero and the latter unit is definitely better.
Andy.
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

--
Ron VE8RT <ve8rt@...>

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or less.

73 Alan G4ZFQ

Thanks Alan,

its something I'm familiar with as its what I'm using for my 60M
beacon. Its been running 24/7 on 12V without a glitch, but lower
voltage operation will be less stress on me :-) when its installed in a
distant hamshack.

Ron ... callsigns go here ... :-)

On Sun, 4 Feb 2024 20:00:38 +0000
"Alan G4ZFQ" <alan4alan@...> wrote:

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or
less.

73 Alan G4ZFQ

--
Ron VE8RT <ve8rt@...>

Thanks Alan,

thats what I went with, the QDX and case have been ordered. Its familiar, in stock, and ships without delay.

Ron a few callsigns since 1970

On Sun, 4 Feb 2024 20:00:38 +0000
"Alan G4ZFQ" <alan4alan@...> wrote:

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or
less.

73 Alan G4ZFQ

--
Ron VE8RT <ve8rt@...>

If you want simultaneous multiband transmitter operation you might be interested in the WSPRSONDE, an eight-channel, 1W? WSPR / FST4W-120/300 transmitter I am developing.? This is an evolution of the "Beacon Blaster 6", a six-channel unit that has been successfully used for ionospheric research during last October's solar eclipse.? The WSPRSONDE has improved RF performance and simplified mechanical construction, and I plan to have this ready well in time for the upcoming April eclipse.? These units are designed for the community, but they can of course be used as a normal ham beacon.? Here's a link:?

I really like my several QDXs, but for WSPR and FST4W operation you might want to stabilize the internal clock.? The frequency drift (caused mainly by transmitter heating) can be a problem.? WSPR is somewhat tolerant of frequency drift, but if you are measuring ionospheric Doppler shift then the transmitter drift completely masks this.? FST4W does not tolerate drift, so transmit and receive) stability is critical.? I have developed an external reference clock adaptor for the QDX, and many of these are in use:??and?


--
Paul Elliott - WB6CXC

Thank you Paul,

this may have come in very handy had the expedition crew and I met
up much earlier. After many texting message exchanges between myself
and the only amateur radio operator on their crew, I think they would
have been open to the idea of including an amateur radio operator if
the idea had come to them soon enough. We checked online coverage for
Starlink (not available in Greenland and no claimed coverage at the
North Pole) and Inmarsat (no clear coverage north of Baffin island), HF
amateur radio may have worked for them. They're only equipped with VHF
FM radios. I'm not aware of any research on HF propagation by amateurs
at that high a latitude (they plan to circle the pole).

A further complication is that the sole amateur radio operator only
holds his Canadian basic qualification without HF. I don't know if I
can program in my call sign and have this operate mobile without an HF
qualified amateur along. Additionally, I want the beacon turned off
before they circle the pole in Russian territory, no need to transmit
position reports on the Russian side of the pole while using my
Canadian call sign.

The expedition expects to travel south and circle the south pole
later. It may give them some time to consider including amateur radio
and qualified operators. A multi-band WSPR beacon would be a great
asset.

I'm working on other projects in the north, including Nunavut VY0,
and I'm in touch from time to time with the "Radio Club" VY0ERC in
Eureka. It would be interesting to have your multi-band high stability
beacon operate in the far north. I'm curious how well WSPR works with
the fading, distortion, and Doppler shifting from aurora.

73 Ron VE8RT VE8TEA

On Mon, 05 Feb 2024 06:45:09 -0800
"Paul WB6CXC (tech-blogs: wb6cxc.com, TurnIslandSystems.com)"
<paul@...> wrote:

--
Ron VE8RT <ve8rt@...>