73 Amateur Radio Today – April 1969
Issue Contents:
Dual-channel Oscilloscope Pre-amplifier
– Convert your scope to a $1000 dual channel job. Save money …… W3ZZY 6
Simplest RF Pre-amplifier
– Simple new very effective. Works too …… W1EZT 10
Education and Ecstacy
– Reprint from LOOK Magazine re the “magic” of ham radio …… Leonard 14
Push-to-talk
– Converting the Two’er for this valuable function. Beats LSMFT …… VE3ETJ 16
Variable DC Load
– For testing power supplies and things like that. You never know ……W2AJW 18
Single-side SWR Bridge
– Complete with plan for etched circuit board …… WA5SWD 22
100 kHz Marker Generator
– Used to mark frequencies up to the 144 and 220 MHz bands …… W7CJB 24
One Technique to Avoid That Routine QSO
– Desperately needed information for many phone and CW ops …… W6EUV 28
Minimum Cost Silicon Semiconductor Survey
– Long article but transistor buffs should flip over it. Flip …… Zaranski 30
Heath SB-610 Monitor Scope Modifications
– Makes a good piece of gear even gooder. You need one …… K6SDE 42
VHF FM Station Control
– Switches two channels in each of two bands …… WA7EVX 46
A Simple Portable Rig for Six Meters
– Two transistors and one IC modulator and head for the hills …… WB6BIH 48
Using FETs in Burst Generators
– Now what in the devil is a burst generator? …… K3VKC 50
Two Meter Converter
– For the Swan 250… Or any other receiver or transceiver …… K3VLQ 52
VSWR An Outmoded Parameter
– Adding fuel to the fires of controversy? Or calling troubled waters? …… VE2AXQ 55
Testing the Drake VHF Converters
– The new Drake converters for six and two are grrrreat! …… WlEMV 56
About Loading…. Which Loads What?
– Can an antenna really load a rig? Or does the rig load the antenna? …… Staff 58
0 Cycle Filter
– The ultimate in selectivity …… LX5SM 60
Camp Albert Butler
– You’ve read the ads… Here is what it is all about …… W4UF 68
Extra Class Study Course – Part 3
– Part 3 of 10 parts. Good luck …… Staff 70
Learning the Morse Code
– A new and much faster approach to the code …… K9AAU 85
73 Amateur Radio Today – April 1969
