Roger G3XBM's (Mainly) Amateur Radio Blog

Years ago I was inspired by a circuit for a 40m transceiver by W2UW who is now a SK. My challenge was to see if I could make an 80m versio...

This was another of my attempts to get something for nothing!  It worked remarkably well, but I struggled with netting the RX onto the TX fr...

This has been on before, but I make no excuses for posting it again. One of the challenges in amateur radio is to see how simple a complete ...

One of the challenges in amateur radio is how simple can you make a rig that really communicates? Some years ago I designed and built this u...

This was a challenge I wanted to have a go at. This is probably one of the simplest transceivers one can make. My inspiration came from a 40...

This has been on before, although I make no apologies. It was inspired by a 40m design by W2UW (now a SK). My main issue was netting the re...

It seems like yesterday, but this was designed in 2008. Starting from the 40m design by W2UW (SK) I wanted to see how simple a transceiver c...

There is always a challenge getting the most from very little. Great fun can be had from simple regenerative receivers.  This simple circuit...

Thinking of ultra-simple rigs, perhaps consider my FETer. I was surprised how well this worked. See  https://sites.google.com/site/g3xbmqrp3...

Some years ago I wanted to see how few parts are needed to make a viable transceiver that really worked. The result was the FETer transceive...

Inspired by W2UW (now SK) I created the FETer transceiver for 80m CW. This uses just a handful of parts, but works. It only uses 14 parts ...

Many years ago, I created the FETer, a one FET transceiver for 80m. Although very simple, it certainly worked. It is featured on my main G3X...

You may be wondering just how simple you can make an effective HF receiver. You may like to try this.  It works remarkably well. See  http...

It seems unbelievable that this ultra-simple design (14 parts) is 10 years old. It was a simpler version of a W2AW design for 40m. I put ...

Many have wondered just how little do you need to communicate on HF?  Well, running really simple rigs is a compromise often with the receiv...

This is a question I asked myself a few years ago. Here I am talking about a complete transceiver. Inspired by a design from W2UW, I desig...

This evening I came on 80m to listen for G6ALB who was taking part in the valve QRP day. Using my  18mW output FETer transceiver (18 par...

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...

Chris G3XIZ has just sent me an updated list of his beacon reports and 2-way QSOs with his 15mW FETer transceiver. His best 2-way DX is no...

Hearing all about the great success Chris G3XIZ has had with his FETer transceiver, I fired mine up this afternoon and put a few CQs out on ...