Roger G3XBM's (Mainly) Amateur Radio Blog

OK, this is very low power but it shows you what can be done. A QRPP transmitter or signal generator anywhere between 500MHz and 1.5GHz. P...

On http://www.amateurradio.com/ there is a link today to the SSTRAN ANT3000 MW AM transmitter kit. This is legal in the USA for broadcasts ...

Many years ago Harry SM0VPO worked at Pye Telecom. I had no idea back then that he was such a prolific and good designer.  This is his desi...

In the early days of wireless, spark transmitters were all they had. Selectivity and bandwidths were not major concerns.  These days it is a...

An OXO transmitter on 14MHz This afternoon I decided to build a 14MHz OXO transmitter . As is often the case, I like to re-use old boxes...

This morning I took a step further towards making a complete 481THz lightbeam transceiver by breadboarding and testing a simple AM transmi...

A very neat and simple MF TX called the E-QTX has appeared on the Google UK500khz group website. This design looks so straightforward that...