Roger G3XBM's (Mainly) Amateur Radio Blog

This dates from 2012!! It was first posted on Facebook back then.

This dates back to 2012, but represents a very simple transceiver circuit for 10m CW. Please treat it as a starting point for your own ideas...

These days, many people prefer FT8 or WSPR for QRP. However, it is fun to see where an ultra-simple rig can reach. This has been on before, ...

Originally, this was called the XBM10-2. It is probably one of the simplest transceivers you can make. It really works! These days there is ...

It is hard to think this is 10 years old! It seems like only yesterday. Maybe you can get some ideas from it. It was called the "Lesser...

The Lesser Chirpy was one of my designs from 10 years ago. It is one of the simplest transceivers you can make. As with all my designs, I  w...

When I was fitter, I enjoyed designing and building. Sadly this is much harder now. Like all of my circuits, I am sure they can be improved...

You can guess why this has this name!  The first version had too much chirp, whereas this has virtually no chirp at all. It is a "for f...

It is hard to think I did this 9 years ago! It has been copied across the Atlantic, although as a "compromise" rig I would not use...

At the moment, at the depths of sunspot minimum, 10m is not exactly busy! In the late spring and summer 10m can be very good for Es commun...

Some years ago I designed a very simple transceiver for 10m CW. This was a "for fun" rig, but it does work. Looking at the circu...

This was designed for 10m when the solar cycle was on the up (rising sunspots). It could still be useful in Es conditions, or it might mak...

Some years ago I attempted to see how few components were needed to communicate on 10m. The Lesser Chirpy was the best I could manage. Th...

This design is a couple of years old and evolved from Chirpy. Unlike the original design, chirp on 10m is negligible . This design really wo...

CT5JZX version of the Lesser Chirpy transceiver for 10m CW In an email from CT5JZX , Pedro tells me he has made a version of my Lesser C...

My 28.060MHz ultra-simple QRP transceiver was copied in the USA this afternoon. K3MM (Maryland) reported me on the Reverse Beacon Network a...

Another report via the Reverse Beacon Network from 5B4AGN in Cyprus this morning, but no QSOs and no further RBN spots. A brief outing thi...

No QSOs this morning yet but a RBN report from 5B4AGN in Cyprus with the 80mW lesser Chirpy 10m CW transceiver to the Homebase-10 halo. Thi...

Lesser Chirpy (should be No Chirpy!) 10m transceiver At last I've got around to putting my Lesser Chirpy ultra simple 28MHz CW trans...

You may recall that some months back I did a tiny transceiver for 10m CW ....that chirped. Well, this is the latest version that does NOT ch...