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- Nice RS on 10GHz now. GB3LEX S9+ in JO01fs. Good to also see GB3SEE at S6, not copied here for a long time.… twitter.com/i/web/status/1… 1 month ago
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Category Archives: GHz_Bands
QO-100 Experiments – New QRP Transmit Up-converter
I started out on QO-100 using a small home made transmit up-converter built around a number of modules available from eBay. Apart from some failed mixer boards this setup worked well for a period of 18 months or so. I … Continue reading
Posted in ADF4351, Blog, GHz_Bands, QO-100, Satellites
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Yaesu G-5500 Elevation Rotator Repair
In a previous post I described how my G-5500 rotator had failed and would no longer elevate my antennas. Based on what I was seeing at the time and a quick check with a DVM I believed that one of … Continue reading
Posted in Blog, EME, GHz_Bands, Satellites
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QO-100 Experiments – New Down-converter
Probably like most people starting out with QO-100 operation I initially used the Goonhilly QO-100 WebSDR to listen to the satellite down-link. This inspired me to experiment with an LNB, a 65cm offset dish, and a NooElec SDR module with … Continue reading
Posted in 3cms, ADF4351, Anglian TVTR, Arduino, Blog, EME, GHz_Bands, QO-100, Satellites
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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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