Roger G3XBM's (Mainly) Amateur Radio Blog

This is a circuit I have never built. It was in QST some years ago and uses a zero bias MOSFET to give better sensitivity. You may want to h...

As far as I know, this is still on. It is in Orlando, Florida, USA this Thursday. As always, check with organisers first before travelling f...

It is a very long time since I chased DX. If I work DX these days it by accident.  To some people, chasing DX is their main focus in the hob...

A friend has reminded me that this contest is this weekend. Entries are for CW and phone contacts. I don't think there is a digital sect...

The FCC has received a "Petition for Rulemaking" making the case for an 8m amateur allocation. This is just a first step in what c...

According to Southgate News the ARRL is trying to minimise the risks to its staff by stopping visitors. Someone had better tell the US Pre...

The ARRL website still has a public link to an old QST article on using a MOSFET as a high sensitivity crystal set. I have not duplicated th...

Some years ago QST had a circuit for a better crystal set that used a MOSFET. I have never tried this, but I should. It is supposed to be mo...

The ARRL is the national organisation in the USA for radio amateurs. It is a bit like the RSGB in the UK. For a while I joined and receive...

There is a gradual downward trend in ARRL membership. This does not surprise me. However, it is worrying. Around the world, generally, the...

This applies in the USA and NOT in Europe! The ARRL reports on some rule changes by the FCC which come into effect next year. See  http:...

Well, not in my book. Southgate News carries news of this test using WSPR around the end of July and start of August. The report mentions...

According to the ARRL, the DXpedition to the Spratly Islands is to go ahead in March. You may recall the sovereignty of these was disputed b...

3Y0Z was to have been a DXpedition to the sub-Antarctic island of Bouvet. Because of technical problems the DXpedition has had to be abandon...

This was last weekend, but guess who forgot? Apparently conditions were not good, so I probably missed very little.

Southgate News reminds us that the ARRL 10m contest is this weekend. With declining solar conditions, 10m is much harder than a few years a...

In the USA the FCC has still not released 137 and 472kHz to radio amateurs!! Frankly this is almost unbelievable. The FCC seems so unbeliev...

There is an ARRL book on the digital modes JT65 and JT9. These are among my favourite modes and ideally suited to QRP. I have used JT9 on ba...

A reminder that there was a 4 page article in Sept QST on the design of my simple transverter for 630m. This is also on my main website at w...

A couple of people who see QST magazine have told me that my article on a 472kHz transverter appeared in the September 2016 edition. I have ...