Instant Counter Calibration

73 that you've read in the last five years, then perhaps you haven't noticed that we are over the threshold of the age of gnat's eyebrow frequency measurement It's rather fortunate that the development of affordable frequency counters paralleled the recent rapid growth of two meter FMt because the serious FMer should have (or have acccss to) a reasonably accurate frequency counter for nctiin lhe crystals in his (her) iig, The luxury o being talked-in on the larger systems has passed. For the...

That February Cover

Here's a picture of a Star Trek communicator as built by Ron Dodge WB0IHR of St. Paul MN and on demo by Jane Skeil. Ron and Jane were using it to beam down to the Dayton What's more fun than a barrel of crystals, more powerful than a smoking H'i more useful than a box of 6146s, and has a handle If you're interested in getting on two meters m style, the Yaesu FT 221 will fiM the bill handily. The FT 221 has complete band coverage, VFO or crystal-controlled, on FM, SSB. CW and even AM. Output on...

Universal

Volts - ohms mA Accuracies to .01 Send for special offer on meter kits. BOX 301, 415 KAY AVE. ADDISON IL 60101 BURROUGHS model D8S65 computer display terminal THE TERMINALS WE OFFER ARE NEW AND UNUSED, IN ORIGINAL CARTONS. This display terminal has an integral controller, B,j IV cathode ray tube and keyboard. The system has a serial I O interface for communication and an I O interface for a printer. These units employ standard Motorola RTL Technology. DISPLAY (P N 4802*1095-501) FEATURES...

New Viatron Version Iv

Verada 214 purchased the Viatron Computer Company's entire inventory in July 1975 and has been manufacturing new Viatron 2111 terminals ever since. We will soon run out of the wired mainframes and will have to stop selling completed systems. We do intend to continue our parts and service department until at least uly 1980. liven though we will not be able to make more complete 2111s (we can't wire the mainframes and make the cabinetry for 699) our parts inventory is extensive, and we can supply...

Info

Surprising Miniature Low Band Antenna the DDRR low noise antenna (part ) Boyer nothing Mickey Mouse about this one WA6EGY 52 The Skinflint's Delight Breadboard - cheap imitation of a commercial C DIP 56 More PLL Magic - like low frequencies for RTTY W9ZTK 60 The Logic Grabber - selected interval logic tracer (S.I.L.TJ WA3TCO 68 Global Calculations for the DXer - 70 Instant Counter Calibration using your 72 Super Simple 450 MHz Rig - go ATV

Ibbb

A RILL RANGE, 5 FUNCTION 3h DIGIT MULTIMETER Dal j Pi-nc > 'Qr. a n,ert M jJi JI the pB -1 -i . s luir lundi q d gllai mult Ttir- fUu tn tftfv. +eltfl the MCxW *34 ott ivi* (fe it* pfRtMfl I f 4 Irf f-k neu tUI Jf*j J'i And tttfy rt srctJSe m lL '- J- T-1 fii-3' rmj1' ly 5 1Q umnm mq accyr V Itlfld *hal i Irarr n fitlOg rn jl r nd t fltrjl d i) jj 5ief t -l-jJ. WcKln H mesure f . nr Al -j-r -ir DC ifld AC currflm arm ftsHitflttce lhrflL flfi -i. lot il ol 2 mnnr r intarpglgtlons aru nAOtiiaty...

Baudot

O Dump octal) This mode provides a listing of consecutive memory locations beginning at an address specified when the mode is first called. Listing continues for a specified number of eight byie lines. After entering This mode from the Monitor, the computer prints a colon prompt to indicate it needs the starting address. The user enters the six digit split octal starting address. The computer responds with a SPACE and awaits user entry in octal of the number of eight byte lines desired. ExampJe...

OUTPUT

Fig. 3. 1 i topuf conditioning circuit utilizing two sections of the quad two-input NAND gate. the 7400 quad two-input NAND gate is a whopping sixteen cents, Fig, 1(a) shows the common schematic representation of the two-input NAND gate. Fig. 1(b) is the truth table that shows the output of the NAND gate for all possible combinations of inputs. The truth table is the key to understanding the NAND gate, and will be referred to repeatedly in subsequent discussions and applications of this device....

National Multiplex Corporation

3474 Rand Avenue, Box 238 South PlainfieJd, New Jersey 07080 NEW - 8080 I O BOARD with ROM Permanent Relief from Bootstrap Chafing This is our new turnkey board. Turn on your Altair or Imsai and go (No Bootstrapping), Controls one terminal (CRT or TTY) and one or two cassettes with all programs in ROM. Enables you to turn on and just type in what you want done. Loads, Dumps, Examines, Modifies from the keyboard in Hex. Loads Octal For the cassettes, it is a fully software controlled Load and...

Atlantic City Nj

The Personal Computing 76 Consumer Trade Fair will be held August 28-29, 1976 in Atlantic City, Mew Jersey. Seminars and technical talks, major exhibits, demonstrations, door prizes, and free literature all abotlt software and hardware development. microcomputers, m& mories, com an sons, interfacing, implementation, AM SAT, computerized music, video terminals, construction, printers, games, and tapes. Admission 5 ad vanced, 7.50 at door iincludes ex-hi bits and seminars). Exhibition booths -...

Eav

Encoder-decoder circuit diagram, teleprinter switching, 10 volt supplyt and other controls on the terminal unit. Fig. 4. Encoder-decoder circuit diagram, teleprinter switching, 10 volt supplyt and other controls on the terminal unit. then on is straightforward. After ail Ehe components have hecn installed, check the board but do nol plug in the ICs, Connect the unit to 10 V and check that the voltage on pin 16 of ICIO is 5 V, If not, change R44 to achieve this value. VVitii an...

Nye Viking Super Squeeze

Fast, comfortable, easy and tun Model SSK-3 has sub-base to hold any SPEED-X Key . Whether you're a brass pounder or a ''side swiper' insist on the sure smooth feei and the long-lasling quality that is built into every NYE VIKING KEY. Available at leading dealers around the world or write for a descriptive catalog. 1614 - 130th Ave. N.E., Beflevue, WA 98005 Fig. 7, Low cost 10 Watt ATV transmitter exciter left, amplifier right . Fig. 7, Low cost 10 Watt ATV transmitter exciter left, amplifier...

Data

The basic S,LL K circuit R1 makes certain that the Ul CL input is positive enough to enable Ul, R2 is used to satisfy TTI. rules and may replaced by a TTL input or LTD readout loadL at your leisure for proper pulse coincidence, absence of proper pulse at a specified time, presence of a wrong pulse, etc. This enables ihe home brewer to determine if his digital logic project is working properly, or to trace any troubles that may crop up in a particular digital iogic project. In this...

Cr Electronics

CA, 94404 415 574-3571 TELEX 349334 W. Sanger Green 1379 E. 15 Street Brooklyn NY 11230 It Wits a bright, sunny morniny in May, 1929, I arrived at Central Airport I Camden, N.J. at eight o'clock, checked nrogress of the constr iction of the two new hangars, and went to my temporary office in the old hangar lean to lt 1 was looking over the morning mail when Bob Hewitt manager of the Ludington Philadelphia Flying Service, phoned and asked if I could take a charter...

Vhf Fm Kits And Equipment

tVfStQH or BROWNtJfN 1t.i rxoNtcs t our. 2 WAT i R ST. P O BOX 1921 HINGHAMTON. N.v. 139 607-7 9574 Yes, now 1COM helps you steer clear of all the hassles of channel crystals. The new 1C-22S is the same surprising radio youve come to know and love as the IC-22A, except that it is totally crystal independent. Zero crystals Solid state engineering enables you to program 22 channels of your choice without waiting. Now the 1COM performance you've demanded comes with the convenience you've wanted,...

Alphanumeric Transfer Sheet

There ps no tonger any pen and ink work needed to produce sharp component identifications Now you can just rub off the designations you need from Trumbull's alphanumeric transfer sheet. There is no need to hunt from sheet fo sheet to match up an alpha designa ion with a numeric designation All commonly used components are printed arranged in ,1 n series R 1 h R2, R3 . . . R51, C1, C2, C3 , . . C30, etc. . Multiple series of each of the above designations are available rn each set. Lesser used...

Viatron System Data

Ml V2111 OPERATOR'S MANUAL - 68 Page S 5.00 M2 V21 TRAINING OUTLINE - 72 Page 5,00 M.3 V21 ENGINEERING DRAWINGS 239 Pages 25,00 M4 REEL TO REEL, 7 TRACK amp 9 TRACK OP. MAN UAL - S Pages 1.00 M 5 COMMUNICATION ADAPTER MANUAL - 10 Pages 1.25 M6 ROBOT MANUAL - 16 Pages 2,50 M7 VIATRON DISPLAY MAINTENANCE MANUAL - S Pages 1.50 MS V2 CHECK OUT PROCEDURE AND FAULT SHEET .25 M9 CARD PUNCH READER ADAPTER MANUAL Q29 - 2 Pages 1.00 COMPLETE SET OF Ml THROUGH M9 ONLY - 35,00 SMI SYSTEM 2101 SERVICE...

LD

T. wiring tables from all ICs to their connections. This takes care of all ma jot-wiring except for some resistor and switch hookups. The numbers preceded by an indicate the fanoul required from an output with more than one connection. Thus pin 2 of the 10711 01 goes to 3 inputs. Pin 5 oi the 1071TO I goes to 7 inputs, which is close to maximum about 10 TTL loads in most cases NC means no connection. BLANK means that the IC has no internal connection on that pith of a PC board....

Thunderbird

No other antenna gives you performance on 10, 15 and 20 meters equal to the TH60XX Super Thunderbird. It's built, without compromise, to be electrically and mechanically superior to everything else. Separate Hy-GM traps are used for each band and they are factory tuned for peak performance. You can get optimum results on transmission, phone or CW, with the easy-to-use tuning charts we supply. The cast aluminum, tilt-head, boom-to-mast bracket accommodates masts from W to 21 2 and provides mast...

F

Have been receiving QST, and your magazine is far more interesting, infor maiive, humorous, etc. Speaking of humor, why not put in a few cartoons with a technical or ham political theme We need a lough in these times of trouble, etc , etc., etc, Your editorials are also very good and I o like the Autobiography of an Ancient Aviator, Let s have lots of ATV, repeater stuff, HF CW 5SB SSTV, and conrv puters and computer technology. You'lf undoubtedly kill HR. CO, QST. oi anybody else, with a lot...

Bugged

Bugged Radio

Re your J O Editorial, page 811. June, 1976, 73. The Bugbooks are relatively useless unless either you purchase the kits from E amp L around which they are written, ar you know enough about the devices to deduce what's in the kiis and start from here, in which case you probably dont need the Bugbooks anyway. J know, I have the whole set and have spent a good many hours with them. 1 also hive been in design work with TTL for some time and am studying up...

Resolution

Relatrve Ta Commending The Radio Amateurs Of Southern Cal if of nia WHEREAS, I hi Amateur Radio Operators of California have provided important public services foi mofe than 50 yean to ihf seople of the state. and are dooming of special reco mtion lor their outstanding record of dedicated community iervice and WHEREAS. The Amateur RadjQ Oper-Jtrri of California their American Kjdio Relay Lea n1 provid oui emergency oorn municaliom in times of natural dm ti, such ai firtr Hood, and earthquake,...

Low Band Antenna

- - the DDRR low noise antenna part I Joseph J,, Boyer 7302 Yukon, Suite 63 Torrance CA 90504 Fig, L Close-up view of military-type Directly Driven Ring Radiator DDRR antenna set up for long range communications tests in the 2.0 to 30 MHz frequency spectrum. Dark vertical posts supporting the ring elements are fiberglass tubing topped with beehive insulators. The hands of the engineer at the left rest on the 50 k V variable vacuum tuning condenser. The height of the ring in the foreground is...

Computer Section

Prizewinning Computer-Controlled Ham Station Read All About It Hamming Is Fantastic Resolve the problem today with a Hustler Super Gain antenna. Get a double measure of improvement with extra signal gain transmitting -additional gain receiving. G6-144A 6 db coiinear with maximum gain at the horizon D C. grounded element Superior mechanical performance. Used extensiveEy on repeaters and fixed station service across the nation Total height 117 SO-239 connector. Mounts on vertical pipe up to 1 3...

Gold Chip

Brand new process by RCA in which hhe aJumrftum meloli.-jli hak been replied by gold. The chip t hermetically seal ed. Wiiat this meorn Fo you h unpi ecedt n ed reHaJ-nility end uniformity. Plastic oarr ihiif meet mi I specs I Tii-Tek is oroud to be rhe Fint to bring thU new Eoiflf or 3er Forma nee to you at SURPLUS PRICED. Why buy regiadts CA30T A t, Impr-oved genera I purpose op-r mp, amp pin dipT,5 c CA307 .Supei 7 1 op-amp. 5 pjn dip CA324 gt . Compensated quad op-ampt 14 pin dip 31. 00...

UM

Multiply by 2 A plus A shift one bit left . boring C. Wh ite WIODI 26 Boswell Rd, heading MA 01867 How would you like to be able to press one button and get complete satellite orbit information without referring to various tables and graphs Now that the new programmable pocket calculators are here, it is entirely feasible to do just that after a simple program entry which will give you all the information on your favorite satellite for the next month or so. For the past several months...

Electronic Keyer

Palomar Engineers has introduced a new iC keyer that lakes less space on your operating table than the old semi automatic mechanical key. The new keyer sends somi-auto matic, full automaiic, self-completing, dot memory, iambic, and as a straight key. It has a built-in sidetone oscilta tor and speaker volume and speed controls, automatic semi-automatic switch, weight adjustment and battery holder Any desired speed from 5 to 50 wpm can be selected while you send. The keyer is easy to learn and...

Electruwcs

Rca 00v 115w t05 npn 1.25 g d40c1 npiv Dari 0.25 3n-1.i43scr 4 0 a t022 0.65 2n2222npn g ampi. 0.20 2N3904 NPN Ortw 0.16 7N3906PNP Compl ZN3904 0 15 2m440 npn lonv 'rrtl nnn 0 20 .''.1 401 Pf tP N dr rf g.25 1n400 400p1v 15'o't.oo 1n4007 4000pev 10 lor 1.00 in746 3.3 Zan. 4 lor 1,00 1 4t4g Sv,nch 20 'a T.QQ Frarti Altfl hr yuur a htmi nlfur. Power Supply Kit 5 Vos 1 Amp. Ftoo Line regu hci 005 Load regulation SOnV Ki inc j E Co'- xPC Oiwd. Tr rv

Microaltair

The complete Computer System that requires just a keyboard and TV monitor for use. The hardware video terminal interface board, CPU ROM RAM board, backplane, power supply and cabinet The software video driver, debugger, operating kernel supplied on ROM The personal computer system complete, expandable, no loose ends a complete and powerful tool