It has been a while since my last blog update, work has been keeping me busy so having found some quality time to kick off the next radio project I went back to the VFO design, which to me is the heart of any SSB transceiver. Following on from my last experiment with the Analogue… Read More »
Been a while doing anything radio-related, updating this site has been low on the TODO list due to work commitments. However, there are new projects in the pipeline which include four homebrew transceivers – yes four! 144Mhz, 70MHz, 50MHz, 28MHz separate units with a nostalgic twist – watch this space!
Quick video monitoring GB3ANG beacon on 70.020MHz in Scotland from my QTH here in Newcastle upon Tyne – a tad over 113 miles away.
Both the receiver and transmitter stages are now complete, apart from the S-Meter driver board which is not really key at this stage. I can see the finish line and perfect timing for the 2018 Es propagation season – more to follow over the Easter weekend, I might even get some of the boards wired… Read More »
Receiver section under test, GB3ANG beacon in Dundee weak but readable with homebrew 3 element Yagi 5 foot above ground level – going to brave the rain and try and get the antenna another 10 feet in the air! Here is a short video of the receiver in action – messy lash up for testing… Read More »
Back on to the homebrew 70MHz SSB transceiver project having been consumed with work and stuck in a “over thinking” loop re-designing the 70MHz transceiver receive front end module I have now completed a working unit – third attempt! So, to cover off my initial attempts I was stuck with problems like little or no… Read More »
I have designed an elaborate DC Protection and Distribution unit for the 70MHz SSB transceiver project, the purpose of this module is to provide two stage reverse polarity protection, power on/off switching, filter and a switched DC bus for transmit and receive. I have designed the 70MHz linear power amplifier (yet to be finished) to provide… Read More »
Well, having taken a pause on the build of the big rig, the HF642 I am taking a slight diversion for a few months and designing a single band, 70MHz SSB transceiver. Keep checking back for progress info on both projects, I am easily distracted so hopefully this will not turn into two expensive half-baked… Read More »
Impedance matching transformer calculator Please feel free to download this software and use it to aid designing toroidal and multi-aperture core transformers for matching Crystal Filters and interstage coupling transformers. The software is provided as-is with no warranty, please feel free to distribute the software to others however please make sure you give me credit… Read More »
Starting to look like a radio… The front panel assembly has started, next stage is to wire all of the controls, meter and display. The black bezel was formed by using a piece of clear perspex sheet with the meter and display windows masked off then spray painted using car bumper spray paint on the… Read More »