Category Archives: GHz_Bands

Fun on 10GHz – 3 ‘EME Experiment’

Posted on September 14, 2022 by g4hsk

The prolonged hot and dry spell that the UK and most of Europe has experienced has meant that there’s been no rain to enhance the capabilities of my small 10GHz home setup. My small dish only has a clear take-off … Continue reading →

Posted in 3cms, Blog, Elecraft K3, EME, GHz_Bands | Leave a comment

QO-100 Experiments – Maclean MCTV-670 LNB

Posted on September 11, 2022 by g4hsk

I was asked recently which LNB is most popular with QO-100 users and is the easiest to modify to improve frequency stability. Several “off the shelf” names sprang to mind, they’re often advertised as TCXO controlled or PLL suitable for … Continue reading →

Posted in Blog, EME, GHz_Bands, QO-100, Satellites | Leave a comment

QO-100 Experiments – 2.4GHz UMTS PA

Posted on September 10, 2022 by g4hsk

I spent a long time looking at the various power amplifiers being advertised for QO-100 use. My ideal unit being one that could be used for both QO-100 and normal 13cm terrestrial operation down at 2320MHz. It could be a … Continue reading →

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QO-100 Experiments – New QRP Transmit Up-converter

Posted on February 2, 2022 by g4hsk

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 | Leave a comment

Yaesu G-5500 Elevation Rotator Repair

Posted on October 20, 2021 by g4hsk

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 →

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QO-100 Experiments – New Down-converter

Posted on February 13, 2021 by g4hsk

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 | Leave a comment

QO-100 Experiments – ADF4351 SynthShield

Posted on January 21, 2021 by g4hsk

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 | Leave a comment

Yaesu G-5500 Fault – No 2

Posted on October 27, 2020 by g4hsk

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 →

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QO-100 Experiments – LNB Modifications

Posted on July 28, 2020 by g4hsk

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 | Leave a comment

Enhanced USB-to-Serial PTT Interface

Posted on March 1, 2020 by g4hsk

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 | Leave a comment