73 Amateur Radio Today – April 1980
Issue Contents:
Sunspots… What Do They Mean?
– your guess is as good as mine …… G3WDI 32
More on Jammer Nabbing
– hints on equipment and strategy …… WB0CMC 36
Cheapy Scanner for the Memorizer
– is $5 cheap enough for you? …… WA2ORU 38
Back to School
– we can still learn a thing or two about basic electricity …… W6HDM 40
Moving Display ASCII Readout
– works with UARTs keyboards and micros …… W8VL 46
Lab-quality Hi I Supply
– part II …… McClellan 54
A Better Car Regulator
– improved reliability …… Gelsinger 58
Test Gear Bargain from Heath
– a multi-purpose RCL bridge …… Staff 62
Semiconductor Test Gadget
– use with your scope …… Truesdale 64
Shoes and Socks for the IC-502
– when your vacation ends you’ll appreciate this amplifler/pS combo …… N4QH 66
Hams on The Trail of UFOs
– the Army’s “flying saucer” movie… did you see it? …… K8NQN 68
Hi-fi CW for the TS-820
– the SSB filter copes with numbing noise …… K3HBP 70
Going 2m All-mode with Yaesu’s FT-225RD
– not just another pretty face …… W6OJF 72
The PL-259 Connection
– reducing adapters need not try your patience …… AC5P 73
A Micro-controlled Ham Station
– TRS-80 does it …… W4UCH/2 76
CW and the TRS-80
– send Morse with a Level l …… WB7TUG 80
A Solid-state RTTY Keyboard
– with auto-shift …… K2BLA 88
SWLing? Try This Souped-up SSR-1
– digital readout and more for Drake’s fine receiver …… G3WDI 92
Off to MARS with the S1
– mod is also useful for oddball repeater splits …… K5EDS 96
Field-strength Fever
– this simple meter eases antenna tuning …… W6DOB 98
CB to 10
– part XXIV: Penny’s SSB rig …… WA4UUV 100
Build an Audio VOM
– and keep your eyes where they belong …… AC5P 104
Sound-sensitive CW Sender
– for hands-free Morse …… W2GZ 106
A Tightwad’s FSK Demodulator
– using the 567 PLL …… WA5WPQ 108
Measure Frequency on your DVM
– this 3-chip circuit works to 10 kHz …… W3HB 115
73 Amateur Radio Today – April 1980
