Further Notes on the I-177 Tube Tester, Feb. 1967, p. 46.
Still More on the I-177, Apr. 1967, p. 54.
APX-6 Cavity Conversion, Feb. 1968, p. 82.
Identifying Illegible Type Numbers on Vacuum Tubes, 
   Jan. 1969, p. 42.
Grinding Techniques for Surplus Crystals, Sept. 1969, p. 26.
AN/ART-13 on 160 Meters, Apr. 1973, p. 61.
A Twin-Paddle Key Made from Surplus "Straight" Keys, 
   Feb. 1973, p. 16.
A Low-Cost IF Converter for Surplus Panadapters, 
   Sept. 1973, p. 43.
Solid-State BC-221 Frequency Meter, Feb. 1977, p. 35.
Stabilizing the R-392/URR Receiver, Sept. 1978, p. 36.
Buying Surplus Gear, Apr. 1978, p. 35.
More on Solid-State Conversion of BC-221/LM Frequency Meters,   
Dec. 1979, p. 59.