Solar flux is 151 and the SSN 114. A=9 and K=3.
22 Apr 2023
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!!
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