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T EVIS i - AmericanRadioHistory.Com

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e e e e to servicemen<br />

who really want to<br />

learn to use the<br />

OSCILLOSCOPE<br />

fully and accurately!<br />

A complete<br />

guide to using<br />

the handiest<br />

service instrument<br />

of all ...<br />

... On all kinds<br />

of jobs!...<br />

Written so you<br />

can really<br />

understand it<br />

MODERN OSCILLOSCOPES<br />

AND THEIR USES<br />

By JACOB H. RL'ITER, Jr.<br />

of Allen B. DuMont Laboratories, Inc.<br />

326 pages, .370 illustrations, $6.00<br />

Like most servicemen, you've probably<br />

read a lot about oscilloscopes -but<br />

still don't know how to use them as well<br />

as you'd like to.<br />

If so, here's the book you've been<br />

looking fort<br />

In MODERN OSCILLOSCOPES AND THEIR<br />

USES. Mr. Ruiter starts right at the beginning. He<br />

shows how oscilloscopes are designed and how they<br />

work. Then he explains exactly how, why and where<br />

to use them.<br />

No involved mathematics. No puzzling theoretical<br />

discussions. Instead, this world famous authority gets<br />

right down to earth in answering the questions that<br />

have probably kept you from taking full advantage of<br />

the nlnney- making service poibil it ii +in nscil,nscnpes.<br />

HOW TO HANDLE TOUGH JOBS<br />

EASIER AND FASTER<br />

From routine troubleshooting to handling<br />

the toughest realigning and adjusting<br />

jobs, each operation is carefully<br />

explained. These include determining<br />

where and how to use the oscilloscope;<br />

how to make connections; how to adjust<br />

circuit components, how to set the controls -AND,<br />

ABOVE ALL, HOW TO ANALYZE PATTERNS.<br />

Front dozens of pattern photos you see and learn to<br />

recognize patterns that are wrong, nearly right and<br />

exactly right!<br />

SAVE HUNDREDS OF DOLLARS<br />

IN AM -FM-TV SERVICE TIME!<br />

Busy servicemen have r1.1 u- 1...n<br />

the television service section of MOD-<br />

E RN OSCILLOSCOPES alone is worth<br />

the entire price of the book. Here you<br />

get exact procedures for aligning the 1 -F<br />

stages; aligning Y -F tuned circuits in<br />

the mixer stage; checking gain of the picture 1 -F stage<br />

by stage; troubleshooting the sweep circuits ... and<br />

dozens of other jabs. Similar big sections cover use of<br />

the oscilloscope in AM :rod FM radio servicing and<br />

other electronic uses.<br />

No other type of specific service training can mean<br />

so much ro you in terms of increasing your efficiency<br />

and earning power. Use coupon today!<br />

READ IT 10 DAYS at our risk!<br />

Dept. EN -43. RINEHART BOOKS. Inc.<br />

technical Division<br />

252 Madison Avenue. New York 16. New York<br />

Send MODERN OSCILLOSCOPES AND<br />

THEIR OSES'for 10-DAV FREE EXAMINA-<br />

TION. If book is satisfactory. I will then send you<br />

$6.00 promptly in full payment. If not. I will return<br />

hook postpaid in good condition and owe you<br />

nothing.<br />

Name<br />

Address<br />

City, Zone. State<br />

Employers Name and Address<br />

Price outside U.S.A. 56.50. cosh only. Money back<br />

if you return book within 10 days.<br />

138<br />

1118<br />

nas and an apparently bewildering<br />

combination of stacking and matching<br />

devices are now available for<br />

fringe area installations. To select the<br />

best antenna requires a full knowledge<br />

of the reception conditions at the<br />

customer's home. A test installation<br />

is often required to determine just<br />

what difficulties prevail and then,<br />

with a sound knowledge of the characteristics<br />

of various antenna types, the<br />

proper choice can be made. It is often<br />

said that "for each man there is a<br />

maid" and similarly, for each installation<br />

there is an antenna, the right<br />

one just has to be found.<br />

Spot Radio News.<br />

(Continued from page 18)<br />

to be used extensively by the new administration,<br />

during a recent news<br />

conference conducted by the President's<br />

news secretary, James C. Hagerty.<br />

Noting that we are in a day of<br />

a new medium, TV, Hagerty said that<br />

perhaps it might be possible to devise<br />

a system whereby the President could<br />

give monthly talks, or conduct press<br />

conferences via television once a<br />

month. No specific details on the<br />

plan were issued, but it was indicated<br />

that the networks are being consulted<br />

on the most practical methods that<br />

could be used.<br />

Prexys of the nets applauded the<br />

news that such a regular TV schedule<br />

from the White House might soon<br />

become a reality, and all indicated<br />

that they would be very willing to cooperate<br />

in working out the various arrangements.<br />

All Presidential telecasts would<br />

also be carried ria standard broadcast<br />

facilities, Hagerty also indicated,<br />

thus making it possible for over 100,-<br />

000,000 to see and hear the President.<br />

THE LONG -DELAYED all- important<br />

theater TV hearings finally received<br />

a go -ahead during the early part of<br />

the year, and engineering and accounting<br />

experts of motion picture<br />

interests, and radio and wire companies<br />

began offering testimony.<br />

Appearing on the stand were representatives<br />

from the National Exhibitors<br />

Theatre Television <strong>Com</strong>mittee<br />

and the Motion Picture Association of<br />

America, AT &T, RCA, Western Union,<br />

American Petroleum Institute, Theater<br />

Network Television, Theater Television<br />

Authority, Independent Telephone<br />

Association, Aeronautical<br />

Radio, American Trucking Association,<br />

and the American Civil Liberties<br />

Union.<br />

Briefs did not seem to impress the<br />

<strong>Com</strong>missioners too much, and some<br />

of the members bluntly asked if the<br />

hearings would serve any purpose.<br />

Three factors appeared to disturb the<br />

seven -man body; lack of a programming<br />

plan and cost data, and details<br />

on the number of hours that might be<br />

used. Many inconsistencies in testimony<br />

covering the classification of<br />

RADIO Surplus Buys<br />

CRYSTALS<br />

. in FT 241 -A Holders -64"<br />

PIn SPC. Marked 54th OR<br />

72nd Harmonic MC Freq.<br />

Listed below by fundamental<br />

frequency with fractions<br />

omitted.<br />

500 KC Crystals<br />

1000 KC Crystals<br />

200 KC Crystals<br />

$1.95<br />

$3.95<br />

370 407 444 476 509<br />

372 408 445 477 511<br />

374 409 446 479 512<br />

375 411 447 480 513<br />

376 412 448 481 51.1<br />

377 413 450 483 515<br />

379 414 451 484 516<br />

380 4,5 452 485 518<br />

381 416 453 486 519<br />

383 418 454 487 520<br />

384 419 455 488 522<br />

385 420 456 490 523<br />

386 422 457 49, 525<br />

387 423 458 492 526<br />

388 424 459 493 527<br />

390 425 461 494 529<br />

391 426 462 495 530<br />

392 427 463 496 531<br />

393 429 464 497 533<br />

394 430 465 498 534<br />

395 431 466 501 536<br />

396 433 468 502 537<br />

397 434 469 503 538<br />

398 435 470 504 540<br />

400 436 472 505<br />

403<br />

401<br />

402<br />

437<br />

438<br />

473<br />

474<br />

506<br />

507<br />

440 475 508<br />

$100<br />

404 441<br />

405 442<br />

406 443 IO for Sß.00, Po :paid<br />

FOLLOWING CRYSTALS AVAILABLE IN<br />

FT 243 HOLDERS '2" PIN SPACING<br />

3590 5035<br />

7350<br />

4165 5127.5<br />

7450<br />

4280 5285<br />

7750<br />

4335 5587<br />

7815<br />

4350 5660<br />

4370 5730<br />

4440 6073.3<br />

4445 6075<br />

4540 6140<br />

4620 6350<br />

4635 6525 $oo<br />

4710 6700<br />

EACH<br />

4880 6875<br />

4980 6975<br />

4995 7150<br />

11 to. S10.00, Postpaid<br />

PLEASE ENCLOSE FULL AMOUNT WITH ORDER<br />

QUANTITIES AVAILABLE<br />

WRITE FOR YOUR REQUIREMENTS<br />

C<br />

& H SALES CO.<br />

BOX 356-rE EAST PASADENA STA. PASADENA B, CALIF.<br />

L. A. HAM SHACK SELLS FOR LESS<br />

METERS -WESTON SANGAMO<br />

ALL NEW ALL L C. 2" SQUARE<br />

t<br />

ó 5 Ma 73.29<br />

'Q<br />

0 -50 Mo EACH<br />

0-100 Ma<br />

0-200 Ma 3 for<br />

0-300 Ma<br />

0 -2 Ma $3.95 0 -500 Ma $ 9.00<br />

Mfg'rs inquiries: lots over 100<br />

Voltmeter. 2" sq. -0 to 20 Volts $3.29<br />

DC Voltmeter. 2" sq. -0 to 300 Volts w /Est. resistance.<br />

<strong>Com</strong>plete $3.95 3 for $9.95<br />

RF Ampmeter. 2" sq. -0 to .5 Amp $3.95<br />

Ampmeter. 2" rd. -0 to 50 Amps. $3.29<br />

Ampmeter. 2" sq. -0 to 50 Amps.<br />

3 for $3.29<br />

3" Round Meters. DC. All New. 0 - 15, 0 - 30,<br />

0 - 300 Mills. $4.95 Each 3 for $11.95<br />

Milliampmeters. 21/2" rd. 0 -30 Mills. Each $3.95<br />

Milliompmeters. 2" rd. 0 -50 Ma. 0 to 5 Ma.<br />

movement. Each $3.29 3 for $9.00<br />

Thermocouple. 2" rd. 350 Milliamp. HF....$3.29<br />

"S" METER. Illuminated face. Full scale reading<br />

of 5 ma. A standard valve for most "S" Meter<br />

Circuits. 27/s". Black face. New $2.49<br />

Amp. Meter. No. 60 -0-60. New $1.29<br />

COMMAND AND /OR ARCS<br />

TRANSMITTERS and RECEIVERS<br />

3.6 MC Receiver Used *8.95 -New $17.95<br />

6 -9.1 Receiver Used 7.95 -New 1 95<br />

Triple Receiver Rack<br />

V.X.F. ARCS Transmitter or Receiver,<br />

<strong>Com</strong>plete w /tubes Used 24.95<br />

Used New<br />

4-5.3 MC Transmitter with tubes $ 8.95<br />

5.3 -7 MC Transmitter with tubes 7.9S<br />

7.9.1 MC Transmitter with tubes 9.9S $19.95<br />

3 -4 MC Transmitter with tubes 18.95<br />

Cash with order. California orders please include<br />

31/z% Soles Tax. Please include approximate<br />

postage - excess will be refunded. What<br />

hay. you in sae-<br />

L.A. HAM SHACK<br />

plus? Submit.<br />

1306 Bond Street, at Pico, Los Angeles 15, Calif.<br />

RADIO & TEL<strong>EVIS</strong>ION NEWS

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