The photo shows the ornamental cherry tree in our garden. The blossom lasts a few weeks then is gone.
25 Apr 2023
Ephemeral - NOT amateur radio
The photo shows the ornamental cherry tree in our garden. The blossom lasts a few weeks then is gone.
24 Apr 2023
Six metres
6m is sometimes called "the magic band" as it can open when least expected to incredible distances. In early July I have often copied Japan on 6m. This is a very long way for a VHF band. There have been some even further distances covered. With the Es season a few watts (or less) can work DX to at least 1500km.
It is also a useful band for local chats and that inspired my Sixbox. This is not suitable for DX working, but is ideal for local natters.
See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/homebrew/sixbox .
No photos please - NOT amateur radio
One of our granddaughters does not like her photo being taken, as you can see!
Plans for Monday
My 481 THz test software and lead are my priority. When I did the optical tests way back more than 10 years ago PCs had separate mic and headphone jacks. All my PCs now have combined jacks!
So, I have to interface my optical RX and the PC in a new way. With soldering skills very hard these days, this requires some thought. Years ago I would just have bought a new jack socket (with mic input) and just changed the plug! I think years ago I just used a lead with standard 3.5mm plugs at each end.
I may put the 10m WSPR beacon on too.
UPDATE 1038z: 10m WSPR beacon is ON and my audio setup (interface from 481 THz RX to the PC) is working with Spectran. At G1KQH's suggestion I used a USB sound card I already had and it worked first time. Thanks for the suggestion Steve.
UPDATE 1144z: No 10m WSPR spots of my 500mW beacon. I suspect things are very disturbed. I checked all was well on another RX.
UPDATE 1515z: 4 stations have spotted me today so far on 10m WSPR. My 481 THz TX beacon and RX work with QRSS and Spectran.
Sunspots - Monday April 24th 2023
Solar flux is 135 and the SSN 86. A=66 and K=3. Things seem pretty disturbed.
23 Apr 2023
Spectroid app
My lounge PC and smart phone have Android apps including a free one called Spectroid. This might be suitable for my 481 THz tests. It is available on the Play Store. It is a powerful audio spectrum analyser (see screenshot).
Robins - NOT amateur radio
Of all our garden birds, the humble robin is probably the most endearing. They can be very tame. Actually, as shown in David Lack's famous 1947 book "The Life of the Robin", it is a far more complex bird than it at first appears. By the way, the book has been reprinted many times and the latest version is available online.
See https://www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/robin/ .
Salisbury - NOT amateur radio
I do not think I posted this photo of Salisbury last week. If I did, put it down to old age!
10m QRP FT8 (Sunday)
Since about 0945z, I have been in 10m FT8. Plenty of spots.
UPDATE 1426z: 149 stations have spotted my 10m FT8 QRP today.
UPDATE 2030z: 245 stations have spotted my 10m FT8 QRP today. QRT soon. No spots from N.America.
UPDATE 1426z: 149 stations have spotted my 10m FT8 QRP today.
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| QRP 10m FT8 spots of me today |
UPDATE 2030z: 245 stations have spotted my 10m FT8 QRP today. QRT soon. No spots from N.America.
Endings - NOT amateur radio
Endings do not work for me. When things end, I can find things hard. As I get older, and friends around me die, it is sometimes harder to make sense of things. Many years ago some things were very important to me whereas now they are less so. Impulses that were strong long ago are less so now.
As I have said many times, most religions seem to be too Earth-centred for me. I still think it must be great to have a strong faith, but I cannot be true to myself. As a youth I tried to be "saved", but never was.
My philosophy has been to be as honest and open as I can be and kind to others. I am not perfect, but I know this.
80m QRP FT8 using the earth-electrode "antenna" in the ground
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| 80m FT8 spots of my QRP using the earth-electrode "antenna" in the ground |
As I managed to match the FT-710 to the earth-electrode "antenna" in the ground, I was on 80m QRP FT8 early last evening and again now. So far, 60 stations have spotted me. It certainly works!
Later, I may try calling into the CDARC (Cambridge) 80m net.
UPDATE 1000z: I tried to go on the CDARC 80m net, but heard nobody. Noise level was S9, so I QSYed to 10m FT8 instead on the FT-710 at QRP level. Plenty of spots on TX and RX.
160m QRP FT8 with the earth-electrode "antenna" in the ground
Last evening and overnight I was on 160m QRP FT8 using the earth-electrode "antenna" in the ground. Even my XYL cannot see it!
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| 6 hours 160m FT8 TX at 3W using the earth-electrode "antenna" in the ground |
Results were remarkable with 53 spots of me right across Europe. As an experiment, I left it on overnight at just 3W. 23 stations spotted me as the map shows in the last 6 hours alone! It certainly works. Furthermost was a spot by YO3APJ (2082km).
22 Apr 2023
Chromebooks - NOT amateur radio
For about 2.5 years I have owned and used a Chromebook rather than a Windows PC. When I first got it, I wondered whether I had made the right decision. It uses Chrome OS rather than Windows 10 or 11.
It was the right decision, definitely.
It starts very fast, does updates painlessly in the background, and does everything I need for my lounge PC. I have not found anything I want to do with it that I cannot do. Also, it was far less expensive than a Windows PC and came with a 3 year "at home" warranty. It is pretty rugged too. It runs Linux apps too, although I have never needed to. It can also be used as a touch screen tablet.
I have been extremely pleased with it. Next year I shall probably buy another one!
80m FT8 tonight?
Just might try 80m FT8 TX this evening after dark when 10m is no good. It means matching the FT-710 to the earth-electrode "antenna" in the ground and setting WSJT-X for use with the FT-710. For the last few days I have been using the QDX.
UPDATE 1606z: As 10m does not exactly look great, I might swap to 80m FT8 quite soon.
Football - NOT amateur radio
In the UK, we call soccer "football". I am definitely an armchair fan! The last time I went to a match in person was 3 years ago with my son and grandson at Cambridge United. Watching on the TV is not the same, but some matches are very expensive.
Today, I have split loyalties: Plymouth Argyle used to be my local team. If they win today they have a better chance of promotion to the next league up. Cambridge United are struggling at the bottom of the table and face relegation. Last time I looked, Plymouth were 3:1 up.
Wrexham Town, who are a non-league team, could be promoted into the Football League if they win tonight.
UPDATE 1600z: Plymouth Argyle won 3:1.
Plans for next week
My plans for next week are currently as follows:
- Restart experiments on 40.680 MHz QRP FT8 TX now the Es season is almost here.
- Put Spectran software on the shack PC and carry out local 481 THz optical tests with it.
- Go on 10m QRP WSPR TX whilst on 8m.
- Perhaps try 80m TX with the FT-710 using the earth-electrode "antenna" in the ground. Maybe I should try 80m FT8??
- With Spectran on the PC, I could also perhaps try some 136 kHz QRSS tests.
Memory costs - NOT amateur radio
It is amazing how inexpensive memory now is. Just now, I ordered a 32GB flash drive for just £5.49. We can expect in 10 years this memory will seem small: it would not surprise me if 1TB costs under £10 in 10 years.
Spring in the garden - NOT amateur radio
Spring is a lovely time of the year. Everything springs into life after what seems like a long winter. Summer migrant birds are returning from Africa and the blossom is at its best. The birds are singing and building nests.
On the trees, the leaves are a fresh green, whereas later they look tired. Blossom is ephemeral. In a few days it will be gone until next spring and so the cycle goes on.
The photo shows spring in our garden.
10m QRP FT8 (Saturday)
My tiny QRP QDX transceiver was turned on at 0830z. So far, just a local spotting me. On RX, I suspect a pirate as the only station spotted so far is in South America where it is still dark and the time is all wrong.
In the last day, 222 stations have spotted my 10m FT8 QRP from all over the world.
UPDATE 0841z: A few more stations coming through on RX.
UPDATE 1000z: Sorry, the South American was last night, not this morning as I was looking at the last 12 hours, so was probably genuine. So far this morning, 10 stations have spotted my QRP 10m FT8.
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| Stations spotting my 10m FT8 QRP today |
UPDATE 1325z: 43 stations have spotted me today and I have spotted 55. The photo shows the stations that have spotted my 10m QRP FT8 today.
UPDATE 1516z: 50 stations have spotted my 10m FT8 QRP and I have spotted 73 on RX. I get the impression things are not so "hot" as yesterday. So far, not a single North American has been spotted. Also, I wonder if working the same stations yet again causes people to lose interest in FT8 unless there is some choice new country to chase? On SSB, FM and AM people can chat, whereas they cannot on FT8, although JS8call allows keyboard chats.
UPDATE 1816z: Switched to the FT-710 from the QDX. This works on TX on 10m but not on 80m. I must be doing something wrong. 6 stations have spotted me so far at 10W on 10m FT8 TX. Maybe the settings are per band?
The current station
The photo shows my current station. On the left is the FT817ND with the SWR meter above. On the right is the FT-710 and tiny QDX transceiver plus the Tigertronics USB interface used with the FT817ND. In the background is the little used MX2 2m SSB handheld.
Out of shot is the 500mW W5OLF 10m WSPR beacon TX.
21 Apr 2023
VLF earth-mode TX
Looking back over some of my old photos, I came across this photo of my 5W earth-mode VLF transmitter, that was last used over 10 years ago.
The 3C90 toroid on the left is to match the low impedance output from the TDA2003 to the earth-electrode "antenna" in the ground. In the centre is the TDA2003 audio amplifier. On the right is the keyer IC that can produce QRSS or CW.
It would be good to do some more experiments in the future, if my health allows.
Doom painting detail - NOT amateur radio
Earlier this week I posted a photo of a "doom" painting in a local church in Salisbury. It was painted centuries ago before many could read or write. I expect many in the congregation looked at the painting and thought about hell and purgatory.
The whole painting reminds me of Bosch. It was whitewashed out by the "thought police" and rediscovered in the 1800s. Attached is a small part of the painting in detail.
Salisbury walk - NOT amateur radio
We went to Salisbury mainly to see the cathedral, but it was a very nice place to visit. On 2 occasions we did a lovely walk though the water meadows, where John Constable painted on many occasions.
Rallies this weekend
The following have been notified to me. It is advisable to check first for accuracy before going far.
Saturday April 22nd - Moray Firth ARS (no location or postcode given). Contact mfars.secretary@gmail.com .
Sunday April 23rd - North ARS Blackpool, FY2 9AA. Contact dwilson@btinternet.com .
OFCOM updates
Just a reminder that OFCOM updates its data every week. See the OFCOM website for details.
8m WSPR for all?
Certainly here in the UK and probably many (or all?) countries people seem to have licence free access to the 40.66-40.70 MHz ISM band as long as any national conditions are met. In the UK this means 10mW ERP maximum and full compliance with IR2030. Interference must be accepted and not caused. We know from Australia that 5mW 8m WSPR has been received at 5000km, so much of Europe could be spanned on 8m WSPR by anyone.
This is NOT the Amateur Radio Service!
This probably means any ISM band may be used licence free as long as national law is followed, although I have not asked OFCOM specifically about other ISM bands. Remember OFCOM only covers the UK. You have to either be sure of the legality in your country or seek legal advice if you are unsure.
10m QRP FT8 (Friday)
My tiny QDX was turned on just before 0700z and already at 0721z 12 stations have spotted me.
UPDATE 0905z: 35 stations have spotted me with the furthermost 5Z4VJ (6858km) in Kenya and 53 stations spotted here.
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| Stations spotting my 10m FT8 QRP today |
UPDATE 1734z: 153 stations have spotted my 10m QRP FT8 today.
Friday plans
Later, I hope to be on 10m QRP FT8 with the tiny QDX transceiver.
Last night I wanted to try my FT-710 in the UKAC on 4m, but totally forgot!!
20 Apr 2023
Head for heights? - NOT amateur radio
This man was way up the tower of Salisbury Cathedral. I have no idea what he was doing.
More AI crappery - NOT amateur radio
As an experiment just now I asked Chat GPT4 about my son, who is a professional jazz pianist. I tried about 7 times. The answers were all correct in parts, but every one was totally wrong on when and where he was born and many other details.
My worry is people will believe that AI always is factually correct, when it isn't.
Yes, I am sure a great deal of good can come from AI, but also it could result in a lot of incorrect data being assumed as correct.
At the moment, Chat GPT4 gets about 3/10 from me and "must try harder".
Artificial intelligence (AI) is coming, but it still has some way to go. I wonder what AI will be capable of in 10 or 20 years' time.
10m QRP FT8 (Thursday)
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| Stations spotting my 10m QRP FT8 late today |
We have been away for a few days in Salisbury, so no amateur radio operation for a few days. We returned about 1515z today. I have been on 10m QRP FT8 and, so far, 60 stations on 4 continents have spotted me and I have spotted 119 stations on 5 continents. I am using the QDX transceiver. It runs less than 5W.
481 THz testing
The photo shows me testing my optical kit. It was recently tested locally. I want to do some over the horizon tests with G4HJW.
19 Apr 2023
The Knowledge - NOT amateur radio
Every day I get "The Knowledge " by email. It is a few minutes read summary of the news from various sources. It is free and produced by the makers of "The Week". As far as I can tell it is neutral, neither left or right politically. I find it excellent, especially if you have not too much time.
Today there was a piece about AI. Be afraid, be very afraid.
Doom painting - NOT amateur radio
This painting is in a local church in Salisbury. It was painted when most people could not read or write. It was white washed over in the Reformation (vandalism in my view) and rediscovered in the 1800s. Why do people believe they always know best? It is part of history.
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