24 August 2019

Zagreb Hrelic flea market

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Hrelic, at last! In August 2019 I could spend a whole Sunday in Zagreb, which means I could visit the large open-air flea market (every Sund...
21 August 2019

LNB current consumption

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My 10 GHz LNB draws 106 mA regardless of the voltage. And apparently it works down to 8V: battery power for /P is possible! Actually there...
22 June 2019

A second dish for 3 cm

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I got a surplus 40 cm parabolic reflector for my 10 GHz experiments. It doubles the caravan set where I will mount the LNB and use in the ...
20 June 2019

Thermal isolation for HB100 transmitter

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The actual frequency of an "HB100 10 GHz radar doppler HAM RTX module" is very sensitive to external factors: supply voltage, prox...
15 May 2019

Tools for planning 10 GHz "expeditions"

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Activity on 10 GHz means portable operations. If you live near some mountains, it is a matter of finding a panoramic spot, clear of vegetat...
06 May 2019

Just another 10 GHz test transmission

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Y esterday I wanted to test again my HB100 signal and the online receiver 30 km away. No dish on either side. This is the result of my WFM s...
29 April 2019

32 km on 10 GHz

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Still one-way, but it is quite outstanding: my bare HB100 signal could be received by a bare LNB at 32 km distance with a 13 dB S/N margin....
23 April 2019

Distorted readout on Tektronix 7603

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I got to use my Tektronix 7603 analog oscilloscope over the weekend and started worrying. I usually fire it for few minutes to check a sig...