73 Amateur Radio Today – January 1967

73 Amateur Radio Today – January 1967

Issue Contents:

An IC Crystal Calibrator

– 10 and 100 kHz markers output; costs $13 …… KlDCK 6

Transistor Converter Notes

– Some new developments in Frank’s popular VHF converters …… W6AJF 10

A kW with the Amperex 6KG6

– A very straight forward SSB grounded-grid linear …… W7CSD 14

FET Transconductance Tester

– A simple yet effective checker; a scoop …… W1DTY 16

Climbing the Novice Laddar: Part 2

– Joe starts a homebrew project …… W7OE 20

The QRZ Machine

– Something for the DXers …… W6MUR 26

Ham TV Converter

– Three transistors are all you need …… PA0BVO 30

A Silect Six Meter Converter

– It uses a FET RF amp and etched circuit construction …… W5SJN 32

Autostart RTTY Gear

– A generator and converter for VHF use …… W6AYZ 34

VOM Transistor Tester

– It uses about five components …… Thorpe 38

Low-power Attenuator for Ham Use

– They’re cheap yet useful to 450 MHz …… WB6AIG WA6RDZ 40

A FET S-meter

– Another good use for inexpensive FETs …… W6GXN 42

Unwanted Feedback

– A lucid discussion from one of 73’s top authors …… W2DXH 46

Equipment Protection

– Are you taking adequate steps to protect your gear? …… K5JKX 50

Etched Circuit UHF Dipmeters

– 130-480 MHz; very clever …… W1JJL 54

Hamming VK9-style

– Like to go DXpeditioning on a far island? …… VK9TG 58

SINPO and SINPFEMO

– Another approach to signal reporting …… DJ0HZ 62

432 MHz Antenna Filter

– A coaxial filter for the 70 cm band …… W6AJF 64

Six Meter Final Amplifier

– A useful 100 watt amplifier for low-power rigs …… K9EID 65

73 Reviews the Drake 2-NT and 2-c

– A good 100 watt CW transmitter and hybrid receiver …… W1DTY 66

A Simple Voltage Calibrator

– Jim tells why your meters aren’t perfect and how to live with them …… W2DXH 70

The Link

– A signal grabber for two …… W6HGX 78

Techniques in Tone Signaling

– Tones can be very useful for hams …… WB6MOC K6YTY 82

The Vanguard 501 Camera

– It’s an excellent quality inexpensive TV camera …… WA1CCH 86

The Shackcom

– A simple ham intercom …… W8MQW 87

Gus: Part 19

– Is a flat Coke better than none? …… W4BPD 88

A Little About Noise

– A technical article for those who really want to understand noise …… K6ZGQ 92

The Knight-kit KG-640 YOM

– A fine taut-band VOM at a good price …… W1DTY 102

The Motorola HEP-line

– Good available inexpensive transistors at the corner radio store …… WA1CCH 104

The Knight-kit TR-107

– Knight’s new two meter transceiver looks good …… KlRA 105

What’s New For You?

– 73’s new monthly technical column …… WA1CCH 109

73 Amateur Radio Today – January 1967

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