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ARRL Products: Interference/DF (More) The ARRL RFI Book -- Second Edition. Practical Cures for Radio Frequency Interference. AC Power Interference Handbook -- New insights into the causes, effects, locating and correction of power-line and electrical interference. 3rd Edition. The RSGB Guide to EMC -- Tackle RF interference problems and understand the underlying causes. Transmitter Hunting -- Radio Direction Finding Simplified Amateur Radio Astronomy -- Explore the contributions of radio amateurs, and how to make and set up equipment to study the signals coming from space.

This QST Stray is from the June 2006 issue.

Jim Hanson, W1TRC, author of "A Home-made Ultrasonic Arc Detector" [Apr 2006, pp 41-46], reports that PC boards for the project are available. FAR Circuits, www.farcircuits.net, is producing the 2 × 3 inch boards based on artwork developed by Tom Hammond, N0SS, and John Brosnahan, W0UN.

Jim reports that there has been quite a bit of interest in the detector. He notes that at least one ham, Roger Monroe, K7NTW, already has his detector working. He has been able to use it to pinpoint his first noise source on a pole about 3/4 mile from his home that has been giving him problems on 15 meters.