7th February 2010
I build a variant of Roger G3XBM's latest experimental transceiver, the XBM80-2.
23rd January 2010
A low-speed data link implemented using Pierce quartz crystal oscillators controlled by a microcontroller.
Contains 1 sub-article.
11th October 2008
I finally get around to writing up the circuit diagrams from this old experiment.
Parent article: AM Walkie-Talkie Experiments.
12th April 2008
My simple, fully isolated, audio keyed, PSK-31 interface for my FT-817ND.
23rd March 2008
Various toy AM transceiver circuits on 11 metres.
Contains 1 sub-article.
1st March 2008
Building a toy VHF phone transceiver for 3 metres using only one transistor for both TX and RX!
29th February 2008
Using the Negistor to implement a simple sidetone for minimalist QRP rigs.
26th May 2007
A very simple 2 metre AM transceiver from Roger Lapthorn G3XBM.
11th November 2001
A small experimental HF rig based on a Permeability Tuned Oscillator for the VFO. Currently on 20m, but the plan is to move it to 80m once debugged.
24th March 2000
My simple IR modem to let my computer talk to various consumer devices.