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Twitter Updates
- Still short of a few parts to complete my new #QO100 downconverter. Couple of very minor undocumented features 🙂 bu… twitter.com/i/web/status/1… 4 days ago
- The boards finally arrived and all is good. They fit, and the first one has been assembled and is working! 🙂 https://t.co/jSe0bM5I9u 2 weeks ago
- Being a novice at using KiCAD, I'm keen to see how my ADF4351 synth controller board will fit and work. 🙂 It should… twitter.com/i/web/status/1… 3 weeks ago
- Good decodes today from Andy, @andy_g4jnt. Running some JT9F tests (6 second burst every 30 seconds) on #QO100 https://t.co/Hyeil3WmhI 3 weeks ago
- Five minutes into the ARI EME contest last month and my G-5500 EL rotator failed! Yesterday I replaced it with a he… twitter.com/i/web/status/1… 3 months ago
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Category Archives: GHz_Bands
QO-100 Experiments – ADF4351 SynthShield
I’ve recently used a number of ADF4351 modules in various projects. The last two modules have been used to provide a single fixed frequency output. An Arduino Nano running the F1CJN single frequency sketch is used to control the ADF4351. … Continue reading
Posted in 3cms, ADF4351, Arduino, Blog, GHz_Bands, QO-100, Satellites
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Yaesu G-5500 Fault – No 2
I’ve been using a Yaesu G-5500 Azimuth and Elevation rotator for the last seven years. It has been used to rotate various Yagi antennas, initially a single 9 element DK7ZB for 144Mhz, that was replaced with 2×8 element 144Mhz Yagi … Continue reading
Posted in Blog, EME, GHz_Bands
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QO-100 Experiments – LNB Modifications
I have been using a Goobay 67269 LNB with a small Horn antenna on 10368MHz for a while to monitor beacons via rain-scatter. This was a fairly basic setup, the Chaparral horn had been cut-off and the LNB mated to … Continue reading
Posted in 3cms, Blog, GHz_Bands, QO-100, Satellites, SDR
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Enhanced USB-to-Serial PTT Interface
Many of the modern transceivers today support direct USB connectivity to your shack PC. This USB connection typically enables 2-way audio and CAT control allowing more or less full control of the transceiver, including PTT keying. Where CAT control for … Continue reading
Posted in 23cms, 3cms, 70cms, Anglian TVTR, Blog, EME, GHz_Bands, QO-100, Satellites
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An Arduino Based Four Event Sequencer
When putting together a system using RF switching relays, Low Noise Amplifiers (LNA) and RF power it’s important that things are switched at the right time and in the correct sequence. This ensures that the relays do not actually switch … Continue reading
Posted in Arduino, Blog, GHz_Bands
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QO-100 Experiments – 2400MHz Pipe-Cap Filter
Over the years I’d seen a number of projects that were using one or more pipe-cap filters. They looked as if they should be fairly simple to make so I thought I should try one to help reduce the unwanted … Continue reading
Posted in Blog, GHz_Bands, QO-100, Satellites
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QO-100 Experiments – 2256MHz Local Oscillator
I chose to use an ADF4351 based synthesizer module to generate the 2256MHz local oscillator (LO) needed for my QO-100 QRP transmit converter. This is controlled by an Arduino Nano. Having already used one of these modules for the 54 … Continue reading
Posted in Blog, GHz_Bands, QO-100, Satellites
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QO-100 Experiments – QRP Transmit Converter
Having spent some time listening to the QO-100 satellite using the Goonhilly WebSDR facility and my own temporary receive solutions, I decided it was time to try generating some RF and get a signal up to the satellite. I was … Continue reading
Posted in Blog, GHz_Bands, QO-100, Satellites
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Fun on 10GHz – 2 ‘Rain-Scatter’
I’m still what some might call a novice when it comes to the 10GHz band. It’s a band that’s like no other that I’ve operated on, and I’m hooked on it. I’ve recently discovered first-hand the effect of rain-scatter at … Continue reading
Posted in 3cms, Blog, GHz_Bands, Mobile / portable Operation
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Fun on 10GHz – 1
Over the last 20 years or so I’ve rarely operated my radio equipment away from home. This has changed since I’ve caught the “microwave bug” and got started on the 10GHz band. My 10GHz setup comprised initially of just a … Continue reading
Posted in 3cms, Blog, EME, GHz_Bands
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