BVWS Bulletin Volume 14, Number 4 (December 1989)
Front cover: A selection of crystal detectors / “Cat's Whiskers”.
|44||Detecting the Difference.
|Testing some crystal detectors (Cat's Whiskers') for sensitivity.|
|47||Tuning-In Vintage Sounds (Part 2).
|Further design notes on previously-presented micro-transmitters.|
|48||Headlines of 1923.
|Some early achievements of Frederick Livingstone Hogg, call-sign G2SH.|