Monthly Archives: January 2020

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

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

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