The following are links to articles in portable document format. Many of these were published on club web sites or posted to online discussion groups or club web pages. Some of the more recent ones were presented at club meetings.
These are older articles:
160m to 30m Receiving Converter
(the above two articles were published in the October 1997 QRP Quarterly as "A Top Band Transmitter and Receiving Converter")
Yagis in the Moonlight (VHF contesting)
The following are more recent:
Sound Card Interface Description and Diagram
Introduction to Meteor Scatter
I
also have had a few articles published in QST. You will have to refer to past issues of QST to see these since ARRL holds the copyright. (ARRL members can search for and view these articles by going to this link.)
Here is a list:
An Amplifier for High Impedance Voltmeters, December 1983, page 41
FM Contesting on Taylor Mountain, December 1994, page 71
A MMIC Preamp for "DC to Daylight," November 1997, page 32 (Also available in recent editions of the ARRL Handbook, Chapter 14, as "A Wideband MMIC Preamp")
Mobile and Portable Logging Hints -- A Custom Log, September 2003, page 56
Zip Cord Antennas and Feed Lines for Portable Applications, March 2009, page 34