1979 February Oscar Az/E1 Bearing Calculations p. 38 November Distance/AZ Calculations for DX p. 86 Station November Digital Counter Design in BASIC p. 28 1980 May Low-Pass Filter Design in BASIC p. 35 June Rotator Control Interface and p. 21 Program November Antenna Patterns for the HP-25 p. 71 1981 February Vertical Array Analysis on HP-33E p. 22 February Combined Vertical Directivity p. 19 February TRS-80 Antenna Modeling p. 15 (Feedback: April, p. 53) May Xtal Filter Design in BASIC p. 18 (Feedback: December, p. 55) June Contest Dupe Checking (flowchart) p. 48 October Calculate Noise Figure with BASIC p. 21 (Feedback: November, p. 50) December Characteristic Z of Microstrips p. 88 1982 December BASIC Duping p. 74 December MINIMUF p. 36 1983 May Designing Narrow Band-Pass Filters p. 23 with a BASIC Program May Solar Flux/Sunspot Number p. 42 Conversion for MINIMUF (Feedback: July, p. 41) May More MINIMUF Program Mods p. 43 (Feedback: July, p. 41) July A Simple Computer Model for VHF/UHF p. 32 Propagation August Pi and Pi-L Network Design p. 23 (Feedback: January 84, p. 49) September A Top-Fed Vertical Antenna for p. 25 1.8 MHz--Plus 3 (Feedback: October, p. 48) October MINIMUF for Polar Paths p. 48 1984 January A Keyboard Keyer and Code Practice p. 13 System March MINIMUF Revisited p. 46 May C-64 Keyboard (conversion of Jan. p. 45 1984 VIC-20 program) November C-64 Keyboard Machine-Language p. 57 Routine Explained