Roger G3XBM's (Mainly) Amateur Radio Blog

Whilst I understand recent OFCOM changes to the UK amateur radio licenses, I am disappointed that power levels have been increased. Having w...

We often have more power than we think as individuals. As an example, a private company slipped in an application for a large gas power stat...

There seems to be an advantage on 10m WSPR with a little more power. VK2KRR was using 10W when I copied him earlier. VK5MR who copied me jus...

FreeCharge 12V is a small, portable generator, similar to that used in portable hand-cranked torches. The output is regulated to give 12-1...

This week's Electronics Weekly has a link to Linear Technologies new power converter IC (LTC3108) that can run from 20mV and deliver 5V...

The idea of powering a low power receiver, or even a transceiver or QRPp beacon, from free, otherwise wasted, RF energy that is all around u...

After many years of excellent service my IC703 decided to expire on TX last night: power started to drop when running 5W on 30m then 80m (go...

Just got this letter from M0BMU who has estimated my ERP on 500kHz currently . Dear Roger, LF Group, It is interesting to make an estimate ...

This afternoon I fired up my 700mW 500kHz WSPR beacon and wet string antenna (ERP microwatts) and got 3 reports from G3XVL at 61kms. So, I ...