73 Amateur Radio Today – August 1972
Issue Contents:
Navassa
– The intimate inside story of KC4DX! …… W2NSD/l 4
Slow Scan Television
– Introduction and general principles …… W9NTP 16
Premodulation Speech Processor
– Get a 1 to 2 S-unit increase in signal …… W6AJZ 28
Two Buck Signal Generator
– For 2m FM and stuff like that …… WB4MYL 33
Transmitters Then and Now
– History …… W2FEZ 35
Practical Amateur FM Repeaters
– Next month impractical FM repeaters maybe? …… K9STH 41
El Cheapo Test Probes
– Cheapskate use for old marking pens …… WB4MYL 58
Prog Line Power Supply
– Actually this will power any surplus FM rig getting you on FM for beans …… K6VBT 60
Random Access Switching
– Some push-button control circuit ideas …… W9SEK 62
Diode Receiver for 432 MHz
– Also receives radio signals – like FM …… K1CLL 65
The Taming of the HHRW
– Why have the wife hate amateur radio when she can be induced to grudgingly coexist with it? …… K7TCU 73
$5 Preamp Compressor
– It really does make a difference …… VE3GSP 15
Push-to Talk For The Sixer
– Plus other modifications for this and the Two’er …… WB2YWO 77
Audio Distribution Panel
– And phone patch plus other goodies …… K3PUR 81
Voltage Multipler Supply for Scopes
– A 300 volt transformer can generate 1500 volts thisaway …… K2BEH 87
VFO Operation for the Two’er
– Using the Heath HG-l0 Should work with the Sixer too …… WB6FVW 89
/mM Maneuvers
– Wherein our hero fixes a marine rig answers a QRR and gets into deep trouble …… VK4SS 91
The Sun and Radio
– Science feature! …… W4ZBE 91
Poor Man’s Transcanner
– Mating a scanning receiver to an FM transceiver the Regency HR2 and TMR-8 in this case. Result : aninexpensive transcanner …… WB9FOP 105
SCR Regulator for KW Power Supplies
– More flexible than one of those old great big expensive Variacs and voltage regulators to boot! Your HV supply will be obsolete without this …… W3HXO 101
The Ideal Crystal Oscillator
– For that 1296 MHz rig you are going to build …… K1CLL 115
The HW-16 on Phone?
– Simple modification …… WN2REW 117
FM Adapter
– FM gadget for low band receiver so it will work with those VHF converters and let you listen to all the repeaters …… W1LE 119
Electric Timer
– Turns things (like rigs) on off or whatever you want…… W6LM 127
Circuits-circuits-circuits
– Enough data for experienced builders to make do and references for beginners to get more info …… WA1KGO 129
GDO Coil Extension
– For short GDO’s …… WA0ABI 139
50 MHz DXing
– The band is open a lot more than you suspect. Here’s how to get more DX out of it …… WA6CPP 141
Home and Auto Burglar Alarms
– Are you waiting to get ripped off before you put in an alarm? …… K6ZFV 158
73 Amateur Radio Today – August 1972
