All day, I was trying with 500uW (0.5mW) on 10m WSPR. No spots.
4 Mar 2024
21 Feb 2024
Sucker for punishment? 10m QRPP WSPR (Wednesday)
Yet again I am on 10m WSPR with 500uW (0.5mW).
UPDATE 1431z: No spots. At the moment, I get spotted on this tiny power a few times a week.
4 Feb 2024
Ultra QRPP
It seems to me that, when conditions are good, very little power is needed to be spotted on WSPR. I tried 10m WSPR with 500uW and was spotted in the USA. I tried running legal ISM powers on 22m and, again was spotted widely.
What's next?
28 Jan 2024
Probable last day (for now) on 10m WSPR at 500uW
Unless things dramatically change today, today will probably be my last day testing at QRPP on 10m WSPR. I shall try again in the Es season. It is now over a week since I have been spotted.
27 Jan 2024
10m QRPP WSPR (Saturday)
Another day has passed and not a single spot obtained at 500uW. Unless things dramatically change tomorrow, I propose to stop these tests now until the next Es season.
24 Jan 2024
10m 500uW WSPR (Wednesday)
For several weeks I have had spots of my QRPP 10m WSPR most days. Interestingly, there have been no spots of me this week. It looks as if conditions have to be really good to get spots at 500uW (0.5mW).
3 Jan 2024
10m QRPP WSPR TX (Wednesday)
My 500uW (0.5mW) beacon is running and already 2 spots from EA8BFK (2880km). At these powers, my mind is "blown away". This is just amazing. With WSPR, it would seem the impossible becomes possible.
UPDATE 1530z: EA8BFK (2880km) has spotted me 5 times today. Even though the beacon is pre-programmed to report the power as 0.5W, it is actually 30dB lower at 0.5mW.
14 Jan 2018
How simple?
https://sites.google.com/site/g3xbmqrp3/hf/80m_xbm80
https://sites.google.com/site/g3xbmqrp3/hf/feter-80m-qrpp-cw-transceiver
https://sites.google.com/site/g3xbmqrp3/hf/chirpy
4 Oct 2015
Sputnik QRPp Days
"Dear Space Friends,
tonight (October 4) at 00 UTC Sputnik QRPp Activity Days begin.
Over two weeks (before October 18) "Sputniks" (valves) and "Vanguards"
(pnp Ge transistors) will be sound "beep-beep-beep..." or "V V V...".
All QSOs are approved. SWLs must copy Sputniks or Vanguards QSOs or
CQs. See details on the Club 72 page - www.club72.su
I welcome all operators to take a part and looking for photos,
schemes, comments daily. All info will be published on the Club 72
page, on the blog page - http://qrp-club72.blogspot.ru/ also in the
mail "Sputnik" group and "72 Newsletter" bulletin.
72! beep-beep-beep...
Deep Space Communications Center
operator on duty -
Oleg ("Mr. 72") RV3GM / KH6OB"
"Dear Space Friends,
don't forget to send reports about your Sputnik/Vanguard QSOs/SWLs,
please. Also pictures, schemes of your TXs are appreciate to add on
the Sputnik gallery.
Victor UA1CEX operate on the old valves military TX 1 W G5RV on 20 m.
Peter PA0PJE informed he QRV on 21 MHz on Sputnik clone TX with two
"rod" valves. Also Peter operate on 20 m with Vanguard TX on Ge pnp
AF118 transistors 40 mW.
Sergey RV3DSA informed about his 1960 valves TX made in Germany
RV3GM used 50 mW TX on 14060 +/- kHz (old USSR Ge pnp GT320b
transistors) together with DC RX also on old Ge types transistors (CQ
and RBNs reports so far only).
Sorry, I have not info about Sputnik/Vanguard QSOs for the moment.
Check "Sputnik Days" page on the Club 72 site - www.club72.su
72! beep-beep-beep...
Deep Space Communications Center
operator on duty -
Oleg ("Mr. 72") RV3GM / KH6OB "
20 Jan 2014
QRPp WSPR and small antennas
At 5mW I am really struggling, whereas, for some, DX reports still flow in at this very low power level. All my antennas are low and compromised which is why 1-2W is a more sensible level for me. I suspect my ERP is lower than other QRPp stations when I use 5mW RF. Nonetheless, it was an experiment well worth doing.
In the end, 4X1RF at 3519km was my only report with 5mW on 10m. I had no luck with transatlantic reports despite myself copying plenty of US and Canadian stations yet again,even with a 20dB attenuator in circuit.
From tomorrow I propose to run 100mW RF on 10m being much the same as the unmodified Ultimate 3 kit, although I intend to run 1-2W on my final version.
UPDATE 1700z: 10m closed transatlantic at 1700z.
18 Jan 2014
5mW on 40m WSPR
Normally such a small project would take just minutes but I found the whole job hard work taking at least twice as long. In the same way, PC work takes me longer as I am forever correcting typos.
My 5mW has been spotted locally once and in Denmark 853km away on 2 occasions and once in Holland. Results are in line with expectations so far. Sunspot count still good at 95. The last report of my 5mW signal was at 1744z. It must just be popping out of the noise with a few stations, rarely. I'll leave running overnight to see what happens.
On RX I see I spotted VK6XT, even with a 20dB pad in the antenna line.
RX reports (mine) with 20dB pad in line on 40m |
40m 5mW WSPR spots this afternoon |
15 Mar 2013
1mW (0dBm) TX on 40m WSPR
9 May 2012
Six continents on 10m WSPR
PA1B's power attenuator calculator (see link below) |
26 Mar 2012
PA1B's QRPp website
14 Feb 2012
How little power do you need to communicate?
This sort of power level could be generated by power harvesting, even rectified RF from the HF antenna. Now there's a thought - a free power TX.
5 Sept 2011
More QRPp testing on 137.7682kHz
18 Jan 2011
1mW DXing on 40m
17 Jan 2011
PA1B's QRPp website
This has encouraged me to have a go, so I am currently WSPR beaconing on various HF bands using 10mW out from the FT817 via a 20dB attenuator right next to the rig.These were the results from 40m late this afternoon and into the early evening. Encouraging!
Best DX 983km with 10mW in just a few hours! |
3 Feb 2009
G3XIZ's 15mW successes - updated
He told me, "The little TX is doing far better than I had ever imagined and as a result I must now re-appraise my perception of QRP operations - Hi !"