FILAMENT CHECKER.
Speedy testing of filaments and heaters in all types of tubes is the function of the Sencore FC123. Nuvistors, novars, compactrons, and 10-pin tubes, as well as all of the more familiar types, can be quickly and easily checked with this device. A pair of test leads is supplied for checking CRT's, making other continuity tests, and testing neon indicator lamps. The FC123 sells for $3.95. (Sencore, Inc., 426 S. Westgate Dr., Addison, Ill.)
with TRANSISTORIZED METER... PLUS NEW "MODULAR CIRCUITS" TO BUILD AT HOME!
Now Prepare for GOOD JOB OPPORTUNITIES IN ELECTRONICS Faster-with
1. METER - Transistorized, Portable, AC-DC Multimeter.
2. SCOPE — 5-inch New Streamlined Commercial-Type Oscilloscope.
3. ELECTRO-LAB* — For 3-Dimension Circuit Building.
Sound-powered telephones make superlative yuletide toys
By HAROLD P. STRAND
SURE THEY WORK—and you don't even need batteries! What are they? Just a pair of sound-powered telephones that are certain to turn a couple of kids into a pair of happy hooligans for many a fun-time session. And what's the secret? There really isn't any— other than the fact that a crystal earphone will work as either an earphone or a microphone, depending on whether you talk or listen.
BY INTERNATIONAL RECTIFIER
Here's the Newest Electronic Science Kits! They're Powered by the Sun!*
7 Lab Models... up to 75 Experiments!
Exclusive Master Control Panel on every lab. Indicator scope, galvanometer, signal buzzer, power switch, push-button switches.
Introducing "Blinky" the nite-light blinking bee By WILLIAM H. MINOR
HERE'S a little project that's sure to keep the youngsters amused for hours and hours. About 9" from head to tail, this busy balsa "bee" will blink continuously for over a year on one set of batteries. Blinky's operation is based on two neon-bulb relaxation oscillators, housed in the bee's hollow body.
It takes action to feel like a man. Takes pride, too, and good, skillful training. Join the modern Army's Combat Arms program and you'll have all three.
Pride ? In Combat Arms it makes no difference whether you select Infantry, Armor, or Artillery. You'll be proud of any one of them. And you'll end up proud of yourself, too.
Let's talk straight-from-the-shoulder about indoor boosters. Transistor boosters provide higher gain and are more rugged, but they have one problem — overload (windshield wiper effect, loss of sync, etc.). If you use a transistor booster in an area with one or more strong TV or FM signals — you may be buying too much booster! On the other hand, tubed boosters perform very well in these areas — and what's more, they cost less.
