and where I can get a data sheet?– T.A., Logansport, IN .. CI -ECK MONEY ORDER VISA MASTERCARD DISCOVER 74LS D5. D6. GND OE LE. Q8. Q7. Q1. Q2. Q4. Q5. 1. 28 Alb. 1. 26 A17 O.S. File Type. R C)_. N ICS. 54 Real World. Interfaces. By John Conway. Devices to link your micro with the funct IC). The same size reduction can also oc- cur in many other components files with a different file type. 74LS 74LS 74LS75 . 74LS 74LS 74LS90 Call or write for data Sheet. The original IBM PC System Board employed approximately IC devices including an groups of files having the same filetype extension. We could Figure shows an arrangement in which a 74LS73 JK bistable is UCN’s half-step mode) readers should refer to the relevant data sheets.

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It’s the first multimeter that can truly be “multi” Like duty cycle measurements. Or recording the minimum, maximum and average value of a signal. There’s even Fluke’s filettype Input Alertr”, that wams you of incorrect input connections.

And a unique Flex -Stand and protective holster, so you can use the 80 Series almost anywhere.

Make sure your next multimeter is truly multi. Boa MIS C. Simply hook it up to yourcomputerto display all the morse CW and radioteletype RTTY transmissions that you’ve been missing. For the lowdown on the high-performance, easy -to -tune Morse code detector, turn to page Hugo Gernsback founder M. Yee, production director Robert A. Lowndes, editorial production Karen S. How to pick the right one for a given application.

Microfilm service to readers. Contact circulation department for details. Advertising Sales Offices listed on page ISSN March Published monthly by Gernsback Publications. Second -Class mail registration No.

One-year subscription rate U. All subscription orders payable in U. Simply screw any combination of 24 connectors to one of the interfaces to create the desired adapter. Call toll -free for catalog: The TLS features the highest quality cable in the industry with spring -loaded safety -sleeved plugs.

Thick film circuitry for low reactances.

Rugged design resists shock and lasts longer. Rectangular shape stays put on the bench.

äIS-W LTRACK LOWNS – American Radio History

High quality, soft, silicon rubber cable. Banana plug on measuring tip accepts push -on accessories. Plugs have spring -loaded safety sleeves. A laser radar that shows not only the distance to a sighted object, but also an image of it-and updates that image four times a second-has been developed and tested at Sandia National Laboratories Albuquerque, NM.

The new laser combines some of the advantages of conventional radar with those of video imaging, and has capabilities about midway between the two. Its frame rate is fast enough for possible short-range military applications. The Sandia range -imaging laser uses a small gallium -arsenide semiconductor laser diode that emits continuous near-infrared light that is just beyond the range of the human eye. The signal is amplitude modulated at 4 MHz.

The phase of the return signal is mea – Controlled reproduction of superconducting materials. Researchers at Bellcore Middletown Township, NJ have fab- ricated multi -layered superconducting materials that can be reproduced in a controllable manner, possibly overcoming a critical obstacle to developing high -temperature superconducting devices for commercial use.


Different ranges are represented by varying shades of gray or in pseudocolor. A bush, at longer range, can be seen at right. 47ls73 sky is shown with random shades because it gives no radar return. The present maximum range is about 50 meters.

Future plans include efforts to integrate the electronics, replace the present low -power laser with a higher -powered one, and extend the kc to the hundreds of meters necessary for a military version of the system. A Josephson junction is an electrical connection that al- lows the flow of low -voltage “super currents” between superconductors.

Because the connection is weak, the super current can be easily controlled. Josephson junctions are present in low -temperature superconducting materials, but in high – 4 www. Bellcore’s process for fabricating high -temperature superconductor research prototypes offers a means to engineer and control the Josephson properties so that they recur in a highly predictable fashion.

The high -temperature prototype films are composed of three distinct but similar layers, each made of a ceramic material that consists of copper, barium, and oxygen, along with a fourth substance: Yttrium is used in the superconducting first and third layers, while a mix of yttrium and praseodimium results in a non -superconducting middle layer that serves 74lls73 the critical “weak” electrical link between the others.

By substituting some of the yttrium in the layers with praseodimium, the electrical properties of the layers can be significantly varied and controlled.

The effect of layering of superconducting and non -superconducting materials was achieved using a process known as pulsed excimer laser deposition. Because modified semiconductor -processing techniques were employed to make the thin-film prototypes, Bellcore predicts that this approach could be adapted for manufacturing in large quantities filegype no significant loss in quality. Although this is only the first step toward commercial feasibility, possible applications for the high -temperature superconductors are being considered-including using these materials as extremely sensitive magnetic field detectors for telecommunications systems, and also as integral components in microwave systems.

Potential long-range applications include filetgpe telecommunications systems and computer logic gates. Connectors for oscilloscopes and counters Here’s PBthe total design workstation. Breadboards with 8 logic probe circuits. You have everything you need right there in front of you! New Haven, CT ProtoBoard is a registered trademark of Global Specialties. The search for a giant, thin replacement for the cathode-ray tube-almost as old as the cathode-ray tube itself-is intensifying.

For the first time, color TV sets are being made without picture tubes-the tiny “personal” sets use liquid -crystal displays, or LCD’s. That has encouraged manufacturers to search for ways to build datasheeet LCD’s.

Although LCD color-TV displays as large as 14 inches have been built and demonstrated, their cost would be astronomical using present technology. Japanese manufacturers, joined by their government, have mounted a crash program to develop giant color LCD’s measuring 40 inches or more diagonally.

In the United States, several companies have undertaken major projects also intended to lead to giant, thin, wall-mountable color -LCD TV displays.


Sarnoff Labs expects to reach this goal in 10 years-but it expects Japan to be there in seven. A completely new type of display for high -resolution television has been proposed by Foresight, Inc.

Although details of the product are still obscure because the company’s patent applications haven’t been granted yet, Japan’s giant trading company Mitsui is planning to form a group of Japanese licensees to manufacture the system.

The heart of the Foresight system is a “material”-unrevealed as yet-which “behaves effectively like an optical semiconductor in that its reaction to light can be modified electronically at very high speeds and with great resolution,” according to the developer.

The material, which is used to coat the face of a direct -view or projection-TV tube, is altered by an electrical signal. One of its properties is the ability to 6 retain its altered state until a new signal changes it. Thus only the changes in a picture need be sent to the tube. Foresight said the result can be an extremely high -definition signal using a standard NTSC signal and computerized line interpolation.

The addition of microprocessor picture enhancement could result in a picture with a resolution of more than 4, pixels. It has a -inch diagonal picture and is designed for “home theaters” built into large homes. As displayed in subdued light, the entire wall became an almost theater -sized screen.

Ever since the introduction of the VCR there have been combinations the first Betamax was built into a television setbut that approach has more adherents than ever todayfrom tiny 3 -inch LCD personal-video combinations with VCR’s to giant -screen televisions with slots for videocassettes.

One of the major exponents of that approach is Panasonic, which introduced six new combinations at the show, each one designed for a different purpose. It can record in NTSC only, however. A second 20 -inch combo has two tuners, so it can record one program while displaying another.

Panasonic also introduced two 27 -inch combinations, one that plays standard VHS cassettes and the other with a built-in Super-VHS recorder and a high resolution TV set. No minimums, no postage charge. Just fast, direct delivery to the Radio Shack store near you. Metal shield plus gold-plated pins and terminals for highest reliability.

äIS-W LTRACK LOWNS – American Radio History |

Only Advanced or reset by external switch closure or digital circuit. Count rate up to 7 Hz. Male Printer 34 -Pos. Card -Edge 34 -Pos.

Powertran Cortex [Archive] – Page 4 – Vintage Computer Forum

Header 7 2 1 2 Two -Tone. Twin -plunger dispenser eliminates measuring and waste. Wire included jumpers and board to suit 9. Each 11h tiletype 3 2. Resistance changes in proportion to temperature. Fjletype -tip applicator reduces spills and waste. Shielded Cables Each Cat. Ironclad replacesurface and ment mount tips available. It’s really handy for tight spaces. Data hold freezes display and lets you remove tester for easy reading. Has continuity sounder, low battery indicator.