73 Amateur Radio Today – February 1967
Issue Contents:
Getting Acquainted With Integrated Circuits
– Here’s practical information on using inexpensive ICs …… Thorp 6
Using Low-cost FET’s on Six
– Two $1 FETs and a cheap PNP give 2 dB NF and high overload resistance …… W6AJF 11
Low Cross-modulation on Two
– A $ 1 FET makes an excellent mixer on two …… W6AJF 14
The 30P1 Linear Amplifier
– A peasant’s 30L1: Four 811As …… W1DBN 18
An Improved Multiplier for UHF
– Get enough local injection on 1296 MHz …… W6OSA 22
A Broad-band 80 Meter Vertical
– 3.5 to 4 MHz with no adjustments …… VE1TG 26
A Reliable UHF Directional Coupler
– Here’s a UHF bridge you can trust …… WA6SXC 30
A Solid-state Antenna Relay
– Fast low-loss high-power and efficient …… K2IYC 34
Video Camera Tubes
– There are lots of different types …… WB2GYS 38
A Semi-precision Variable Capacitor
– It’s accurate to 1 pF and uses a component that’s in almost every junk box …… W1DTY 42
Down with the Rotator
– A cheap useful scheme for small beams …… W3BTQ 47
Mobile Logs – Personalized
– Save time and trouble in mobile logging …… WB6KFI 48
Add a Crystal Filter to Your Receiver
– For less than $10 …… W1USM 50
A Reactivator for the Semiconductor Activator
– In other words a battery charger …… K6EAW 52
The Ancient Marriner
– An antenna tuner for coax-fed beams …… W6BLZ 54
Climbing the Novice Ladder
– Part 3 …… W7OE 56
Portable Operation Without Tears
– Useful hints for the prospective portableer …… K3LNZ 60
Practical Tips on Transistor Transmitters
– You won’t want to miss this one unless you’re an AO …… K0CJF 64
UHF-microwave Phased-locked Oscillator
– Stable within less than 1 Hz at 6 GHz! …… K3OJK 68
73 Tests the Eicocraft CPO
– Eico’s new line of inexpensive kits looks like fun …… 78
100 Watts on Two With Compactrons
– Uses two 7894s in push-pull …… K1CLL 80
The Poor Man’s Occasional Antenna
– Cheap dirty and effective …… W7CSD 84
Rewinding the Power Transformer
– It’s not hard as this article explains …… WB2PTU 88
The Drake L-4 Linear Amplifier
– Drake’s new linear is very nice …… WlDTY 90
The Carrier Again
– Part 2 of “AM vs. the Carrier” …… W7CSD 94
A Simple Current Controller
– Very simple and cheap …… K5JKX 96
Equalizing AFSK Tones
– Some notes for RTTY’ers …… K8ERV 96
The International Crystal SBX-9 and SBA-50
– SSB exciter on 9 MHz and mixer to six meters …… W1DTY 100
The National 200
– National’s inexpensive new transceiver is attracting much attention …… W1DTY 104
An Universal Code Monitor
– A clever idea for a simple monitor …… K9VXL K9CLH 108
Gus: Part 20
– A crisis in the Indian Ocean! …… W4BPD 110
73 Amateur Radio Today – February 1967
