Roger G3XBM's (Mainly) Amateur Radio Blog

Because of my poor voice, I mainly use WSPR and FT8 these days. Especially with FT8 there are couple of things making QRP operation harder t...

This was found on the internet the other day.  It looks a very handsome rig, although I do not think it was ever mass produced.  I have neve...

This was a design for a tiny QRP CW transceiver for 40m CW.  This short video shows the radio with a digital display, which was non-standard...

  Recently, there was a 50mW CW QSO on 20m using this homemade TX. I forget who designed and built this.

 I am a great QRP fan. This video may inspire you. Without any amplification on RX I expect the RX is deaf, so best not call CQ, but answer ...

This video is 7 years old, but it might inspire you. Basically it is a 1 transistor transceiver by Dave Ingram K4TWJ from the book "In...

In all the years I have been involved in amateur radio (it started in 1961!) my main interest has been QRP (low power).  In recent years the...

Many years ago I set out to see just how simple a viable transceiver could be made. It was published in GQRP SPRAT. It certainly works! Othe...

Ever since I started in amateur radio I have enjoyed QRP.  DXCC was worked with 10W SSB on 10m with a low dipole in the 1980s.   These days ...

You may be interested in this (and other) videos on the Pititico transceiver on DX Explorer.  As there is no amplification of the audio on R...

DXCC with 10W SSB was worked here on 10m back in the 1980s, so DX is rarely chased these days. Interesting to see this video comparing 5W to...

Whilst rummaging through drawers in my shack trying to find a power supply for an unused PC, I came across this TX. I have no recollection o...

As far as I can tell this ultra-simple transceiver has a passive receiver. It was designed initially by PY2OHH and this version appeared i...

 It is always good to see others trying their hand at my designs. DX Explorer has a video of him breadboarding my 2 transistor 80m transceiv...

There’s a wide choice these days in QRP radios unlike years ago . I expect this is, in part, due to the popularity of SOTA and POTA activati...

This photo was taken many years ago in my mother’s garden. Also, judging by what hair I have, which was still black, I would guess this in t...

My attention was brought to this design yesterday.  My immediate thoughts were than the TX would be fine, but the RX very deaf. For local QS...

I think this file is now shared. If you have problems getting it, please discuss with me. I created it in (free)  Open Office  and saved it ...

In my emails today was the Elecraft Newsletter.  One of the articles was about "extreme QRP". This looks interesting I thought, on...

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...