July 1997 to December 1997 QEX (issues 180 through 185). All dates are 1997 unless otherwise indicated. (We did not publish issues from January through June 1997. ) Empirically Speaking December editorial: Dec, 2 Inputs to the Editor (Severns): Oct, 2 A New Editor (Severns): Aug, 2 Response to the QEX Restart (Severns): Sep, 2 Things are Looking Up! (Severns): Nov, 2 We're Back (Bloom): Jul, 2 Feedback Improved PTT Input Circuit for "A Simple T/R Sequencer," (Oct 96): Jul, 23 More on "A Simple T/R Sequencer," (Oct 96): Jul, 23 "Synthesizing Vacuum Tubes," (Aug 97): Nov, 14 Letters to the Editor Comment on "Synthesizing Vacuum Tubes," (Aug 97) (Anderson): Oct, 26 Interest in Cell Phone Conversions? (Kastigar): Nov, 29 New Harris Parts for DDC-Based Receiver (Anderson): Nov, 29 Miscellaneous Technical The Belittler (Latta): Nov, 22 A Compact Phase 3D Ground Station Antenna System (Krome): Sep, 15 Building a Direct Digital Syntheses VFO (Preuss): Jul, 3 Exploring the 1:1 Current (Choke) Balun (Sabin): Jul, 12 Just Tune to the Dip (Haviland): Dec, 22 Loops for 80-Meter DX (Belrose): Aug, 3 Meet the Vacker: The Simple, Stable VFO You've Been Looking For (Meyer): Jul, 8 Modern Digital Design for the Radio Amateur (Wiseman): Dec, 3 Power and Protection for Modern Tetrodes (White): Oct, 15 Predicting the Performance of Centrifugal Fans for Valve Cooling (Kirkby): Oct, 27 Rewinding Coax Relays for 12 V Operation (sidebar to A Single-Board Transverter for 5760 Mhz and Phase 3D): Nov, 12 A Simple Synchronous-AM Demodulator and Complete Schematic for the DDC-Based Receiver (Anderson): Sep, 3 A Single-Board Transverter for 5760 Mhz and Phase 3D (Wade): Nov, 3 Synthesizing Vacuum Tubes (Cope): Aug, 17; Feedback, Nov, 14 Understanding the T-Tuner (C-L-C) Transmatch (Sabin): Dec, 13 Miscellaneous Circulation Statement: Nov, 30 1997 Index: Dec, 32 RF (Lau) A High RF-Performance 10-Ghz Band-Pass Filter: Jul, 21 Phase 3D--Ground Station Antenna Ideas: Sep, 20 VHF LO for the KK7B 23-cm No-Tune Transverter: Nov, 25 Specialized Communications Techniques HF Modems and Protocols: An Approach to Testing (Riley and Bodson): Oct, 3 A Software Package for Analyzing CLOVER Channel Statistics (Wickwire): Nov, 15 Upcoming Technical Conferences ARRL and TAPR Digital Communications Conference: Jul, 24; Aug, 22 Central States VHF Society Conference: Jul, 24 Eastern States VHF/UHF Conference: Jul, 24; Aug, 22 Microwave Update '97: Jul, 24; Aug, 22 Southwest Ohio Digital Symposium, Dec, 21