Jft

POB 981 Farmingdale MY 11737- If you enjoy driving, you're going to get a COMPUCRUISE, Once you see what it can do, you just won't be able to live without It. This gadget tits into most dashboards . no strain even rn a liny sports car like rhe Mazda HX-7,. and once you have H, every inp is like flying a 747. The darned Ihing lells you the lime. how fast you re going, ho* far you've been on this trip or since the last repassing, how many mjles per gallon you re getting, either at the instant or...

UJ

Bright .300 ht, common cathode display. Uses MM-5314 cFock chip. Switches for hours, minutes and hold functions. Hours easily viewable to 20 ft. Simulated walnut case. 115VAC operation. 12 or 24 hour operation. Includes all components, case and wall transformer. Size 6V 1 x3-1 S'r x Fo ur .E30 ht. and two .300 hi. Co mm anode displays. Uses MM5314 clock chip. Switches for hrs.p mins,F and huid functions. Hours viewable to 30 ft. Sim, walnut case. 115V AC operation. 12 or 24 hour Operation....

Thruune Wattmeter

Elements (Table 1 ) 2-30 MHz 45.00 Elements (Table 1) 25-1000 MHz 38.00 Carrying case for Model 43 & 6 elements 27.50 Carrying case for 12 elements 17,00 READ RF WATTS DIRECTLY (Specify Type N or S0239 con-inectors) 0.45 - 2300 MHz, t- J 0,000 Watts 5 , low insertion VSWRl 1.05, Unequalled economy and flexibility. Buy only the e ement(s)j ouering your present -frequency and power needs, add extra rangi later if your requirements expand. Hy-Garn REEL TAPE PORTABLE DIPOLE for 10 thru 80 Meters...

Info

Andrews Forrestville, Maryland 6756, 13247 Clark Manila, Philippines 8993, 11226 Yokota Tokyo, Japan 8967t 11236 (IStote Above frequencies mostly SSB. but some AM may be used yet on all frequencies. Some other USAF frequencies in general worldwide use include 6738, 6753r 11179, 13201, and 18019.) Table 3, Aeronautical calling frequencies USAF. of them don't appreciate our reception reports, but legally they can't stop you from listening. Some of the international shortwave broadcasters use...

T

15-uF, 35 V dc tantalum, Maliory TDC156M035GL or equivalent 1N270 germanium diode 7 segment common-cathode LED readout 74LS147 TTL 10-line-to-BCD decoder 74LS04 TTL hex inverter 74185 TTL binary-to-BCD decoder 74LS48TTL BCD-to-7-segment decoder 7805 3-pin monolithic, 5-V dc voltage regulator with small heat sink 470-0hm, 1 VWatt composition resistor 1k-Ohm, Vi-Watt composition resistor 1.5k-Ghms Vi-Watt composition resistor 2-polet 2-deck, 10-position rotary switch, Grayhilf 44D36-02-2-AJN or...

Call Toll Free

Call 601 323-5869 for technical information, order repair status. Also call 601-323 5869 out side continent USA and in Mississippi the tape decks is a very simple process of elimination after all of the unused parts are removed. The motors are 110-volt and are wired with regular 18-gauge iamp cord. Proper bypass capacitors are used to minimize any spikes or hash injected into the power tines. The pre-amp assemblies remain where they were originally and are wired with +12 volts dc for proper...

Dx

The new month, new year, and new decade get off to a rousing start if all goes as planned one major DXpedition in progress and one commencing the first week of January, David Schoen N2KK should presently be operating from the Indian Ocean, on Juan de Nova, through about January 8 then he s on to Mauritius, an unnamed (at this time) island in the 3B group, the Malagasy Republic 5R8 on the 20th, and Ihe piece de resistance, the Somaii Republic, around January 30, Dave is mainly interested in...

How It Works

Audio from the receiver is fed to the function decoder. An age circuit is used to feed the eight 567 tone decoders. Their outputs feed various gates to give a total output of each digit corresponding to a 16-digit pad. As a digit is sent, a low signal appears at the corresponding pin of S1. This signal is sent to the input of the address field board, which contains five SN7402 QUAD NOR gates wired as flip-flops. Applied low signats to the two inputs wiil cause thecircuit to turn on and drive Q1...

Only

NOW EAGLE ELECTRONICS INTRODUCES a practical accessory to every amateur station The TM-10001 10 minute ID timer and code practice oscillator will remind you with a loud clear tone when it is time to identity. No longer is it necessary to keep an eye on the clock to be sure you identify in time the TM-1000 keeps track of the time for you. And, when you re not on the air you can use it to improve your code speed because ft doubles as a code practice oscillator. THE TM-1000 HAS FULLY ADJUSTABLE...

Message Memory Keyer

Atfrjnced CVOS message memory o f 0 char cf. -esseg s iof ge pie seno CO CO CO D* at WB2tjU -VB2YJM K then a * second Titssige orr coriac.r tfe WB2YJM QSl f Y 579 5 9 Pa-Paul K Use 'o- a*t . QSOs or contests Se j con-flitr J 3r fJ Ifttf Jii'ef Hofr Scti d cf ffe L- - r smti'C Y'ng + > nv squeeze Speed o-'tiie fun* rie* Lop* currtflt CWOS flifffrn De L Jte qujfm-tftcft ho- hey . nj JnO Ouifpwr Keys gr*a block and solid state ngs Self completing dots and dashes I Both dot and dash memory...

S

, -ar1nr(il Bliitt-tll Lap FF i) nCi t n t ri I nI i,L L-ib JiJUJi 'Ba- iU jj * nm-rmry aitui arrv spUt, iiWi s u .> -. *n1 . < 95 KITTS LANB OPEN 10 00 5 30 MON - FM t sy Dtnections Rt SSoulii HEWNQTON, Connecticut 06111 TH RS tit3 00pm * SAT WOO 4 00 2 Blocks Ps i MacDonaias B nin 'ohe Itdftl I'M Hr tt 11 Hilf* U4 u*-r

The Royal Jordanian Awards

To amateurs throughout the world who qualify, JY1. His Majesty King Hussein I of Jordan, will issue a very eiegant award of achievement to recognize one of I wo levels ot accomplishment. First, the Silver Award is ot-fered in recognition of having worked six different JY prefixes. There are no band or mode restrictions however, all contacts must be on or after January 1, 1971, to count. toughest award of all to obtain is the Coral Award, which is issued to amateurs who visit Jordan and make a...

MFJ

NEW MFJ-940 VERSA TUNER II matches coax and random wire 1 S to 30 MHz. Lip lo 300 watts RF OUTPUT. SWR, dual range wattmeter (300 and 30 watts full scale) Six position antenna switch on rear Select 2 coax lines direct or thru tuner, random wire, and tuner bypass for dummy load INew efficient airwounti inductor (12 positions gives you less losses than tapped toroid for more watts out, 8x2x6 inches. SO 239 coax connectors 208 pf. 1000 volt capacitors Optional mobile mounting bracket add S3.0(j....

The Arabian Knights Award

This award is issued by the Arab Radio Amateur League (ARALi members and presented by His Majesty King Hussein (JYl)of Jordan. To qualify for this recognition of achievement, amateurs must have proof of having contacted at least ten 10) Arab countries, and one contact must be with either JY1 or JY2. Ail contacts must be made on or after January 1, 1971, on any authorized mode of communications There are no special endorsements, To apply for the Arabian Knights Award, the applicant must prepare...

Dealer Directory

We tarry (he following ICOM, Midland, Am-com, Den from KL.M, Swan, drake, Fen-Ted Wil n. SST. MFJ, Hv-Gain, Ulnai, Nvc-Viking. B& W, jpU-kijowaifi CushCrari. Mostey, Signal. Pipo, etc. FjuU Service StoK' ioniana Electronics, B628 ierta Ave., Fonftufr CA 812*7710, Ray area'n riefrest Amateur Radio store- New & used Ama ent Radio & service. We feature Kenwood, tC'OMh Wilson, Yaesu, Alias, Ten-Tee,VHF Engineering & many more. Shaver Radio, Inc., 13TS So. H& *ct> ni Ave,, Son Jos*...

Innovators In Digital Communications

P ioto D, Interior view of filter-blanker cabinet. Note globs of si ast c rubber used to secure connector to PCB Ohms to 390 Ohms, The 390-0hm resistor is included in the kit for use in the SB-1G4A and is not needed in the HR-1680. I could not see that the 56Q-Ohm resistor and the 2.2-uH coil were needed in the HR-1680, so I left them out. The Heath manual discusses the increase in the IMD (intermodulation distortion) when the blanker is installed, and I noticed that a whole flock of birdies...

Input

The crystal filter circuit of Fig, 1 has a number of advantages. First of all, no tuned circuits are involved. The crystafs are simply paralleled, and from one to six crystals can be used, de pending upon whether one wants to construct a simple CW filter with a very sharp response or an SSB filter with a specific bandwidth The frequency spacing of the individual crystals used is critical this will be covered later in detail T he

Hg

Compare the size and strength of the boom to element clamps, See who offers largest and heaviest duty. Which would you prefer Wilson Systems traps offer a larger diameter trap coil and 3 larger cutside housing, giving excellent G and power capabilities. Capable of handling the Legal Limit tht. SYSTEM 33 s the finest compact tn-bander avail-abie to tHe amateur. Designed and produced by one of the world's largest antenna manufacturers, ihr traditional quality of workmanship and materials excelJs...

Ret

NUMBER OF 0-liIT bYTLS TO kE SUBTRACTED SUBTRACT THE OTHER ARGUMENT FROM IT IN CHEfl ETJ T ONE MEMORY ADDRESS AND 0TIiERVI SEJ RETURN FHOM THE SUBROUTINE earlier 8008 floating-point package written by C. E. Ohme, requires 865 bytes of read only memory ROM and 24 bytes of read write memory. Few programmers write floating-point packages because they are available from computer manufacturers of their respective users' groups. Integer, or fixed point, mathematical programs are relatively easy to...

Normal

55 TRANSMIT REPEAT NORMAL RECEIVE REPEAT NORMAL shows a programming scheme consisting of separate BCD-coded switches for receive and transmit A toggle switch is included to add 10 kHz to either frequency. Steering diodes are used to logically OR the outputs of the switches to the PLL input, A ke line in the transceiver is sensed to alternate between receive and transmit while in the repeat mode It will be described in more detail in the following section This is the simplest lt ornplete...

Fairchild Vhf And Uhf Prescaler Chips Hdc Hdc Icfc Cdc Cc

11C24DC MC4024 11C44DC MC4044 11C58DC 11C70DC 11C83DC I1C90DC 11C91DC FairchiId 95H90DC Prescaler Kit 350MHz 95H90DC Prescaler Kit divides by 10 to 350Mhz. This kit will take any 35MHz Counter to 350MHZ Kit Includes The Following 1-95K90DC 1-2N5179 2-UG88 BNC Connectors 1-Circuit Board and all other parts for assembly FairchiId 11C90DC Prescaler Kit 650MHz 11C90DC Prescaler kit divides by 10 to 650MHz. This kit will take any 65MHz counter Kit Includes The Following 1-11C90DC 1-2N5179 2-uG88 BNC...

Tempo

Syncom SI with TTP From Tempo the world's first synthesized 800 channel handheld transceiver. Includes battery pack, charger, telescoping antenna and 800 FT207R From YAESU - 2m FM XCVR. Handheld completely synthesized, digital readout, keyboard access, 2 wattsH 4 memories and much more. KLM PA2-25B Power Amplifier 2 watts in, 25 watts out. FT2 7R Synthesized 2m handheld KLM PA2-25 3 Power Amplifier

Kacrk

Nebraska 68504 m Niibralka C,il 1402 466 8402 LO toil, i ciuwti r rvd.h W pw 4n lupt'b rttt iiinijn iiiirii i gt m ihoft lo nwdnifli H gt iHnn t Ihii mrwd on-fivqutney wfeclrflly in tPu lir iLagr plut FETun Hh Island r,c1 m igt virtual Immunllf kn pul-ol-tipnd flpnpU inlt ioOulthoo dliiortim pnd croti-fltHhilalliM Itirilri itikfophani and p iher ritmniH nhfliirn-cl juiflio I Mfl rilJtJl f fld niljib'r mir pjdmiu lp iimUt giihilfi B C 'lftHt UH HF MtflUilfghl r h-M-pij.-.c...

Naugahyde Zipper Pouch

O.D Approx. 4 XT' Brand new ano of the finest quality it even has ii convenient belt Foop 95' 5 Funnlion Tritium Ni ht Watch T Hours Minutes Snconds Calender Date and Day of the Week Pointer Gold with MetaE Band Your Price ONLY 29.95 NRN Diariingtori 60 Watt a rnp HFE I OOO TO-220 A Tritiur i Watch produces it's own might light No mope button pustnng Terms All ordors shipped promptly. Minimum order 5.00. Telephone orders accepted. All orders shipped UPS or PP. Add extra for shipping amp...

Faces Places

John Shideler WAQNEV piloted the plane from which Dale Monaghen W0HSK photographed the DaVinci trans-american balloon on September 30, 1979. While they circled at 2500 feel about 30 miles northwest of Topekat they used 2m to speak with the craft. Say hello to the new Avanti Amateur Radio Club Addison IL and you'll receive their at-tractive QSL card. Members left to right are Howard Van-Valzah WB9IPG, Joe Krusa WB9PIT, Dale Parfitt WA2YPYt Herb Blaese WB9PXD, Bob Stemhofer KA9FPB. Louis Mar tino...

Alabama

A fut power tuner with continuous tuning 1.8 to 30 MHz. front panel grounding switch handles a lull 3KW PEP inputs unbalanced coax tSO-239 connectors . random wire, balanced tine built-in heavy duty balun 3 cores , capacitor spacing 6000V, transforms toad imp, to 50-75 ohms. Dentron's ultimate tuner For coax, random wire, and balanced teed systems built-in antenna selector switch for 5 different antennas, power handling in excess of 3 KW PEP. built-in 50 ohm 250W dummy Joac dual watt meters. 3...

Thank

I thought that you might be interested to know that your magazine is one of the most important reasons I studied for and passed the test for my ham ticket. After thinking about it for years even to the extent of subscribing to QST several years ago I had decided that the ARRL and ham radio were out, Then I saw a copy of your magazine on the stand. I read it and I subscribed to It because It made the hobby look interesting. On September 19tht I took and passed my Technician ex- am very...

Hamtronics Does It Againi

28-30 MHz in, 435-437 MHz Put IWp.e.p on ssb, up to 11 W on CW or FM. Has second oscillator for other ranges, Attenr supplied for 1 to 500 mW input, use external attenuator for higher levels. Extra crystal for 432-434 MHz range S5.95 2 W p.e.p. output with as little as 1 mW input. Use simple external attenuator Many freq. ranges available. Converts any 2M exciter to provide the 10M ssgnal required to drive above 220 or 435 MHe untls.

Ac Ua

Input leads together and the display should light and read 000 with the minus sign flashing slowiy. These two tests tell you that your overrange feature blanked display and auto-zero feature, as well as the rest of the unit are working properly. Now you can calibrate your meter. There are several ways to do this and one is shown in Fig. 8. The best way is to use a commercial meter calibrator, such as the Datel, Fluke, and other low-cost units. But these are commercial units and the cheapest is...

The Ft Wayfarer

The introduction of the WAYFARER by Yaesu is the beginning of a new era in compact solid state transceivers. The FT-707 WAYFARER offers you a full 100 watts output on 80-10 meters and operates SSB, CWt and AM modes. Don't let the small size fool you Though it is not much larger than a book, this is a full-featured transceiver which is ideally suited for your home station or as a traveling companion for mobile or portable operation. The receiver offers sensitivity of .25 uV 10dBSN as well as a...

Nyd

Am I iCdfpniafran arti,,y , mf,-tiW 305 Airport Road I Qceanside, CA 92054 7VI 757-7525 Passband Tuning with 16 Pole Filters Two 8-poie crystal filters m cascade provides a 1.4 1 shape factor ai -100dB The ultimate in selectivity. Con inuousJy variable to suit your preference. Two independent high stability PTO's provide true split band operation. The digital counter reads the PTO selected, or in split band reads the PTO used for receive then switches to the transmit frequency selected when the...

Crystals In

Simple crystal filter circuit does not require any tuned circuits. crystals are driven from a low-impedance source by the first-stage emitter-follower. At the series-resonant frequency of the crystals, the signal voltage will be developed across the .001-uF capacitor and drive the output amplifier. At frequencies other than those where the crystals ex-bibit series resonance, the capacitor serves as a bypassing element and helps sharpen the skirts of the filter response Some signal...

Mail Order Micros

2 TDL ZPU Z-80 CPU S-100 CPU with adjustable clock CM MHz. good condHioa 00062- i59 1 TDL Systems Monitor Board Contains system software including monitor, S-100, good condition KQQQG3SHI0 1 TDL FDOS 4 SuperBASlC on 3 Dlsk-This re-qul s an ICOM Disk Controller and at least 20K ot memory, plus a ZAPPLE Monitor In an 5-100 Caomei lAitair IMSAI ere D0065 137 1 TDL Sys-em Software on 5 disk Th.s set of system software requires a Nonfi Star Disk Con troller, a TDL Systems Monuor Board r, and...

New Mfj Rf Speech Processor

Gives you up to 4 times 6db more average SSB power on al bands. Powerful natural sounding speech punches thru QRM. Works with any rig. Plugs between mic and rig. VU meter. Uses advanced digital and analog techniques. Powerful natural sounding pro cessed speech punches thru QRM. Plugs between mic and rig No intornmf connections to rig, The MFJ-525 gives you up to four limes 6db more average SSB power on all bands with true RF Speech Processing. Powerful natural...

TO

Fig 1 b . 7600-Hz frequency compandor used to narrow band voice modulation. Several standard ICs are incorporated in the VBC design These include an LM380 that gives one Watt of audio output during receive and an NE571 tor the amplitude compandor The power suppty uses two garden-variety regulator chips, All of the system's active components reside on a 4 5 x 5.5 circuit board. A 44-pin edge connector provides connection to the in-fjuts and Outputs as well as to the switches and gain controls....

The Azden

Amateur-Wholesale Electronics is proud to announce its superior new Azden PCS-2000 2-meter FM transceiver. The PCS-2000 covers 144-148 MHz in 5 kHz steps 800 channels . It features six memory channels and scanning of memory or the full band in free, busy, and vacant'1 modes. All frequency control functions are performed by a microcomputer. Upon inspection, the most striking feature is the absence of a large knob for frequency control . In place of a knob, there is a 12-button microcomputer...

Him

add a crystal CW filter, bfo, noise blanker, and more. . . KA5N 3 Vi-digit unit features autopolarity, auto-zero, and a 30 price tag McClellan 92 Personalize Your Repeater with a Voice ID -low-cost design uses 8-track decks K9EID add an on-board charger, a TT pad, and t. . 98 How to Make Your Own Crystal Filters requires considerable patience, but very few bucks Staff 106 The Prociastinator's Special A Simple Six-Band Antenna this 10-160 endted vee goes up in a jiffy W6TKA 108 They Don't Make...

Specifications

Channel Spacing Receive every 5 kR2. transmil Simplex or 600 KHz Power Requirements 3 6 VOC Current Dram 17 ma-standby 500 ma-transmit Batteries 8 cell 'n-cad pack The Tempo line also features a fine line of extremely compact UHF and VHP pocket receivers They're low priced, dependable, and available with CTCSS and 2-tone decoders. The Tempo FMT-2 amp FMT-42 UHF provide excellent mobile communication and features a remote control head for hide-away mounting. The Tempo FMH-42 UHF and the A I...