Roger G3XBM's (Mainly) Amateur Radio Blog

This was in 2011 and shows me in QSO with the 10mW 2m AM Fredbox. Many years ago I had a cross channel QSO with it handheld. These days it i...

Recently, I was asked permission to reproduce the Fredbox in a PDF magazine in Eire. It was nice to be asked and, of course, I said yes. It ...

These days there are few stations on 2m AM. Compared with a few years ago the general level of activity (FM and SSB) is lower with fewer peo...

It seems hard to think this tiny rig was designed and built so long ago (1974?). It was rebuilt a few years ago and still works. It must cou...

10 years ago I had a QSO with my Fredbox transceiver on 2m AM as the photo shows.  I still have the Fredbox, but sadly there is little AM st...

Whilst clearing the loft, my XYL came across the original photos of the original 2m AM Fredbox made back in the mid 1970s. It was rebuilt ...

My  XYL was looking in our loft for some pictures and came across my mobile logbook that I had not seen for over 7 years. I have never manag...

This photo of me having a chat on my 2m Fredbox must be over 45 years old! It was taken at our Cambridge flat we moved from in 1975! T...

Many years ago, I designed this 2m QRP AM transceiver. This was in the days when 2m AM was very popular. For its day, it was very small! ...

This was designed in 1974, when I was still "green behind the ears". It got rebuilt much later and still worked well. The Sixb...

G7CKF's Fourbox Jenny, G7CKF   has now taken the 2m Fredbox design and created a 4m version called the "Fourbox". Hi Rog...

Many years ago I designed and made the 2m AM Fredbox 2m AM transceiver . At the time it was the smallest 2m transceiver I'd ever seen ...

Since my original Fredbox 2m AM design, a number of derivatives have been designed and built around the world. This is what our hobby is a...

Fredbox 2m AM transceiver The Fredbox was my design for a 10mW AM transceiver for 2m use back in the 1970s. It was rebuilt a few years a...

The December 2012 edition of " Practical Wireless " has my article about the 2m AM Fredbox and the 6m AM Sixbox transceivers tha...

Yesterday, someone suggested that I build a simple 10m AM rig. Now clearly the best option would be a DSB transceiver for which I have many ...

The Sixbox 40mW AM transceiver for 6m. Maybe a Fourbox will follow? The experiments last week by G6ALB and I confirm that to talk over a...

Joe Milbourn has a nice photo of his version of my Sixbox QRP 6m AM transceiver . It looks he's made some changes including the addit...

Today I've added a couple more videos to my G3XBM YouTube Channel . They are of the Fredbox 2m AM transceiver and of the FETer 80m CW tr...

Hamilton, PU2XLB, has built a Fredbox 2m AM transceiver using the G4BYE adaptation of my original schematic. The G4BYE version has an LM38...