73 Amateur Radio Today – February 1970

73 Amateur Radio Today – February 1970

Issue Contents:

Fascinating Fundamentals

– The Terrible Jar at Leyden …… W2FEZ 14

18 in. Dipole on 15 Meters

– February Fool article? Heh heh! …… K9LGH 24

High Performance Converter for 6

– 73 drags its heels into the 70’s with a tube …… WA9HES 30

From Breadboard to Printed Circuit – The Easy Way

– And it is easy for once …… K1AOB 36

The Camper: Mobile and Portable

– Enradioifying the VW bus …… WA9EHE 40

So You Think You Have Troubles?

– Cutting blind ham’s antennas for fun …… W1EMV 43

Frequency Synthesis – The Modern Way

– Special book-length feature for FM fiends …… W2EUP 44

Encoding and Decoding in FM Repeaters Part I

– Encoders for Subaudible Tone-burst or Whistle-on Use …… W6ZCL 72

Encoding and Decoding in FM Repeaters Part II

– Tone Decoder for Remote Switching Applications …… K6MVH 80

Encoding and Decoding in FM Repeaters Part III

– Setting Up the Tone-burst System …… W6TEE 82

How to Visit Foreign Countries

– Using ham radio to make travel funner …… W2NSD 84

The DX-35 Revisited

– Exciting development for chirp haters …… W2AOO 86

Panoramic Receiver for VHF

– For 2 meter busybodies …… I1SL0 88

Variable-impedance Mobile Mount

– Out damned reactance! …… W1EMV 96

Lossy Transmission lines

– A shorty short …… KH6IJ/1 97

Extra Class Study Course Part 13

– RTTY FSK filters and other such trivia …… Staff 98

New Linear IC’s for the Ham

– Cheap-new-hot-have fun …… WA4KRE 115

The Glop Will Get You If You Don’t Watch Out!

– Watch out! …… W2ELU 126

DX as seen by

– Cartoon feature …… W6EIF 130

The Micromitter

– World’s cheapest rig …… WA3GGH 131

A Simple Integrated Circuit Q-multiplier

– Makes the CW band ten times wider …… W2EEY 134

Quick Stop and Reversing for Antenna Rotors

– Whipping antenna whip …… PY2AUC 137

73 Amateur Radio Today – February 1970

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