73 Amateur Radio Today – June 1990 with Index
Issue Contents:
The Field Day Special The “Ray Gun”
– A concentric combo Mode B antenna …… KA5DNP 10
TNC Connect Alarm
– Did anyone call while I was out? …… DA1AU/wB9EGA 14
COSIN: The COmputer Student Information Network
– High school credits for ham radio …… WB2MIC 18
Big But Cheap!
– Put a big signal on 40 meters for under $20 …… K1NIT 22
Two Meter Portable Quad
– Sturdy easy to build …… K3YWY 24
Tune in on the New Frontiers of VLF
– A simple converter brings the low-low bands in on 80 meter receivers …… WD4PLI 30
Experimental Gaussmeter
– Low cost easy construction …… KB4ZGC 34
Standard Magnetic Field Generator
– Build an instrument to calibrate your gaussmeter …… KB4ZGC 36
ICOM Service Survey
– It’s almost painless …… WB6NOA 40
Backward Inverted L Antenna
– This low-band wire antenna is a good performer on bothtransmit and receive …… W1GV 45
The SFA on 15 Meters
– Does the job without drawing the neighbors’ attention …… KA8OGD 57
Memories
– Dr Hess takes a look backward for the seventh time …… W6CK 66
Be a Ham
– The invisible fraternity …… N6SIW 84
Pyramid Phase III PS-25
– An adjustable power supply …… N1CTI 12
FCC Study Diskettes
– For MS-dOS computers …… KA9CSO 21
PC HF Facsimile 4.0
– Easy FAX reception for your PC …… K9EYY 26
Pipo Communications P-7 DTMF Pad
– A quick and easy analog-to-digital tone converter …… W5PFG W5ORW 54
A Radio Journal 1912-1940
– A book full of memories …… NA5E 28
The Cuckoo’s Egg
– Tracking an electronic spy …… WA5ZIB 37
73 Amateur Radio Today – June 1990
