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• Home Made Energy: Does It Work?
• Blood Boiling Karate Drills And Exercises

E. F. JOHNSON COMPANY • WASECA, MINNESOTA

73 Magazine September, 1961

1379 East 15th Street C nntonfc V°lume Number 12

Silicon Rectifiers ..........................................Henry Cnm WI0OP.................. 6

How not to pop 'em, a lesson for haras and engineers alike,

Tuning Bypass Condensers .................................j;m Kyle K5JKX/6 .................... 8

How to make a bypass bypass at the VHF's.

Simplescope ..............................................Harvey p]erQQ W0QPA ................ 10

Perchance the titie may give this one away. You need one. Build it

VFO Chirp VS 6AU6 .....................................Al Brogdon K3KMO ................... 20

Several VFO's use a 6AU6. Lousy choice, try a 6AH6 instead and see. Conso,e ■ • •;.............................................Beryl Dassow W9H KA.................. 22

If you're going to be obstinate enough not to buy an Alden Humbench, then build this.

Class B Modulators .......................................Larry Levy WA2INM .................. 28

We'll print anything.

Eye for Resonance..... ..................................Roy McCarthy K6EAW................. 30

How confounded simple can a GDO get? This is how simple, that's how.

Break-in A la TranSwitch ..................................Ernest Austin W7AXJ.................. 33

Complete station control unit, transistorized.

Environmental Testing ..................................... Joseph Leeb W2WYM ................. 36

Be nice to surplus gear, it has been through a lot.

Band Edge Marker ........................................Charles Berner WA2HRZ............... 37

A 3,5 nic crystal calibrates your receiver on ail ham bands.

Tell The World ...........................................Kyle K5JKX/6 ...................... 39

Hum radio needs publicity, here's how to ko about it.

Zero Shift Keying ........................................Kyle K5JKX/6 ........................ 42

A new idea, presented first in 73. You'll be hearing more about this,

Cross-Polarized Beam .....................................George Messenger K6CT............... 48

A new approach to diversity transmission and reception.

Crystal Oscillators ........................................Staff 50

This is the Big Technical article. You'll find it interesting.

Propagation Charts .......................................Dave Brown K2IGY.................... 64

Why a 73 Page Magazine Is Impossible .....................Wretched Coward K2PMM ............ 72

or: further developments of the K\V Transistor Transmitter.

Editorial de W2NSD

Club Subscription Rs+es ,

Typical 73 Subscriber Shacks .

MARS Technical Broadcasts .

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