27th November 2011
I finally build Charles Wenzel's Curious C-Beeper capacitance probing tool.
3rd July 2011
An AC ion chamber detector for alpha particles only.
16th January 2011
A bit of fun with LEDs, transistors and capacitors.
11th June 2010
A semi-finalised implementation of the passive air-band receiver and field testing while I was travelling in the US.
Parent article: Non-Emissive Airband Receiver.
7th February 2010
I build a variant of Roger G3XBM's latest experimental transceiver, the XBM80-2.
1st February 2010
A RF power measuring head using the AD8307.
4th January 2010
Arcing fault destroys the Rope Light controller.
Parent article: Rope Light Christmas Star.
27th December 2009
I put together a USB ISP programmer for use with my Win32 laptop.
23rd December 2009
A large Christmas Star for my balcony made using a length of rope light and some timber dowelling.
Contains 1 sub-article.
7th June 2009
New pancake Geiger Müller tubes and a fairly small power supply for them.
31st May 2009
Pictures from the May 2009 ARNSW Trash and Treasure meeting.
18th April 2009
A quick hack based on Charles Wenzel's nuclear war detector.
14th January 2009
Another interesting Burkhard Kainka receiver circuit.
10th January 2009
Mathias Katzar builds an all-brass UHF Log-Periodic antenna.
Parent article: UHF Log-Periodic Array.
7th December 2008
Burkhard Kainka's super-regenerative FM receiver from Elektor September 2007.
26th October 2008
A Carver-style LC Test Device.
11th October 2008
I finally get around to writing up the circuit diagrams from this old experiment.
Parent article: AM Walkie-Talkie Experiments.
27th July 2008
Lots of pictures from the ARNSW Trash and Treasure and Homebrew Group meeting.
19th April 2008
Simple parallel port programmer for the Atmel ATtiny13 (and similar ATtiny AVR range) chips.
Contains 2 sub-articles.
23rd March 2008
Various toy AM transceiver circuits on 11 metres.
Contains 1 sub-article.
27th January 2008
An interesting and quite useful autodyne receiver that phase locks the remote RF signal.
Contains 1 sub-article.
18th December 2007
I put the regen-o-reflexive receiver on 31 metres and put it in a box.
Parent article: Regenenerative-Reflexive Receiver.
4th November 2007
An interesting detector idea from PA2OHH.
Contains 1 sub-article.
30th September 2007
Another ARNSW trash and treasure day, including the Homebrew Group meeting with the display of the 80 metre challenge projects and a technical presentation on RF filters.
16th September 2007
A simple dip meter using an audio tone as the read-out mechanism instead of a moving coil meter.
14th July 2007
Experiments with Charles Wenzel's "Passive Aircraft Receiver" circuit.
Contains 1 sub-article.
26th May 2007
A very simple 2 metre AM transceiver from Roger Lapthorn G3XBM.
4th March 2007
My implementation of Drew Diamond VK3XU's "Nano-L", plus how I constructed and trimmed my calibration inductances.
22nd January 2007
My study of the VE7GC "Wee Willy" 80 metre DSB transmitter power amplifier.
14th January 2007
My experiments with the VK2ZOI Flower-Pot antenna for 2 metres.
4th November 2006
An extremely useful RF sweep generator.
3rd September 2006
My implementation of Dick Cappels' simple RF Inductance Meter.
2nd September 2006
My copy of VK5BR's sweeper detector.
13th August 2006
My implementation of Francis Hall's "Euro Set".
6th August 2006
A simple 3-transistor regenerative receiver from the MW broadcast band.
13th April 2003
My ugly implementation of Jens Dyekjĉr Madsen's PIC programmer.
14th February 2003
A super simple inverter that will flash a neon brightly, powered by as little as a single 1.2 Volt rechargeable cell.
10th November 2002
My small implementation of Bill Beaty's soda bottle electrostatic motor.
19th October 2002
My implementation of SM0VPO's cute little QRP linear amplifier.
7th March 2002
A prototype implementation of the Charles Kitchin N1TEV super-regenerative receiver featured in the ARRL handbook.
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.