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Si5351
I found this nice gadget. It is a signal generator and contains a Si5351 integrated circuit. Should be able to deliver signals in the range from 8 kHz till 160 MHz.Hope to get it working with the...
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Clockgenerator
The Si5351 clockgenerator needs 4 wires to connect to the ESP32 DEV board:Si5351 ESP32SCL IO22SDA IO21GND GNDVin 3V32 most...
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6 meter activity
December 28, there was a lot of activity on 50 MHz. Unexpected winter propagation conditions if you ask me. Here you see the stations that received my 15 Watt FT-8 signal on 50.313 MHz :Nice to see...
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432 MHz FT8 contest
Yesterday evening I participated in the 432 MHz FT8 contest organized by ft8activity.euWith my modest 10 Watt station I was able to make QSOs with PA3JQD, PE1NYQ, PA3FOE, PA3GUV, PA3EWP, G4PLZ, PA5Y,...
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North Sea Level rise
I have always had the idea, that past years the level of the North Sea has risen very rapidly. This is what the main stream media tries to make us aware of. Ten meters rise coming years would be...
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UHF Power Amplifier
This UHF final stage is waiting for a heatsink to arrive.Off topic 13 February 2021De Visserman, HavenhoofdDe Kwade Hoek, near Havenshoofd, Goeree
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Fauna in the garden
This non-radio related post is just to collect nice pictures from my garden. I hope to contribute a small bit to the (animal) biodiversity in my neighbourhood.2 March 20212 March 202126 June 2017
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ZX81
Bumped into my first ever bought computer. In 1981 (unbelievable, 40 years ago..) I bought this ZX81. Price at that time appr. 350 guilders. Learned BASIC programming with it. It was a splendid design...
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Schottky diodes
A Schottky diode, also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. Typical metals used are molybdenum,...
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QSO with 9A on 70 MHz
This afternoon some sporadic E clouds were present:A succesful FT-8 QSO on 70.154 MHz with 9A6R over more than 1300 km's.
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144.177 MHz
Lots of FT-8 signals today on 144.177 MHz.Confirmation of one of the many QSO's today:
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PI4VPO
My first visit to VERON A42 clubstation PI4VPO in Hellevoetsluis / Voorne-Putten brought me a nice collection of (paper) QSL cards:
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tinySA
A spectrum analyser has always been a tool for me that I could not afford.I remember the expensive professional Hewlett Packard and Rohde&Schwarz analyser gear of which we radio hobbyists could...
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Crypto for radio gear
A couple of months ago I started to trade a bit crypto currency. The idea was to obtain some extra cash for the radiohobby.I was intrigued by what was going on in the crypto currency community. Learned...
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LPF for 70 MHz
The RF output of my 28 - 70 MHz transverter shows an irritating 3rd harmonic at 210 MHz. I found a simple Low Pass Filter for 70 MHz at dutchrfshop.nl The filter should be able to handle RF powers up...
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UHF amplifier under test
Last FT8 EU contest on 70 cm I participated with my homebrewed 50 Watt UHF amplifier. The amplifier uses an MRF186 in the final stage to boost the 5 Watt RF signal coming from the 28-432 MHz...
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Doggerland
No, Doggerland is not a new DX entity. Doggerland was the land between England and Holland/Belgium/Denmark appr. 10,000 years ago. The Northsea has taken its place nowadays.Doggerland, abt. 10,000...
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Airband receiver
It is not difficult to receive nearby AM aircraft transmissions in the VHF airband (118 – 136 MHz). The aircraft transmissions use a bandwidth of 8.33 kHz. Dutch coastguard Do228Since the ‘old...
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Geminides
This is a screenshot of Meteor Scatter (MS) signals received yesterday:Strong signals from S59A in JO21dq ! As you can see I used the MSK144 mode on 50.280 MHz. Ftol was set to 200.I did not manage to...
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