Automatic Cw

Now you can copy the fast CV*j station* rhe NEW professionally designed DE 150 P'ugs into a uanjceivjef'S Kor C i to maticainy displays Morse code as 1 is bring received New chariicters are entered irom the right and shift leii giving Ei conunuo-n essv io read diSptsy ot thts iB'est re One yni.n Warranty and 15 day retiirri prWUegB Add S5 for shipping, visa & MC cards welcome. (205 1773 275S Box 89ft Hartselle, AL 35640 PA-19 Wideband Preamplifier 1B m ic aou i h Bi*idivi ihi sue t u a bo...

P L I

Down-shiftsr Fig. 4 shows how to do it. It uses two inexpensive 16- x 4-bit-wide FIFOs. Another nice feature of these is that only a single supply is needed, which can be from 3 to 18 volts. Also, no modifications have to be made to the converter board. Operation of this circuit is similar where applicable to the main circuit. If a tape reader is available, see Fig. 5 a reader control circuit. It uses a 555 timer which is controlled by the TBMT output of the UART. This is set by R104 to shift...

R L Drake Company

19 For a FREE Drake FuH Line Catalog contact your favorite Drake Dealer. Donald L. Stoner W6TNS 7 John Hancock Building Mercer siand WA 98040 ne of the most popular words in ham radio argon these days ts compandoring It is rare to pick up an amateur radio publication and not find some mention of this new technique. Since you will be hearing a lot more about speech compandoring in the future, you should know what it is, how it works, and if it is applicable in your station ) should add wrS R3 I...

Sf

One setting covers 10, 15.20. 40M Space resincied or un-iirni'ed vou gel Top signal reports corisrstent conTifcts and comply coverage Add 5th band *ith a 75M resonalor Use one feedi< ne any length Requires no switching or M01 Mobile mast 22.95 c M02 Mobile mast 22.95 c RM10 10 Meter resonator ___________6.95 b RM15 15 meter resonator 7.95 b RM20 20 Meter resonator B.95 b RM40 40 Meter resonalor 14.95 b RM75 75 Meter resonator 16.95 b RM80 80 Meter resonator 17.95 b RM105 10M resonator 2KW PEP...

Aea Introduces New Low Cost Computerized Morse Keyer

A new microprocessor-based Morse keyer - the MK-1-has been introduced by Advanced Electronic Applications AEA) of Lynnwood. Washington. The MK-1 incorporates more than 20 special features. It can easily be programmed to send code at any rate between 2 and 99 wpm with precise full weighting control The operator can adjust the dot to element space ratio from 0.5 1 to 1.5 1 and me dash to element space ratio from 2.0 1 to 4.0 t Other features incorporated in the MK 1 include selectable...

Dx

ZA3KL worked many stations on CW in December but is not legitimate. The beam heading from the east coast of the US was sometimes more in the direction of the South Pacific than toward Europe. January 2 produced a severe earthquake in the Azores islands, measuring 7.8 on the Richter scale. CT2AP appeared on 10 meters, operating from Angra at the Headquarters of the Security Police. The FCC was contacted regarding possible third party traffic With CT2, normally verboten, and the FCC Treaty Branch...

Spring Cleaning Super Savers

Panasonic RF-4900 General Coverage Receiver List 549,95 Ours * 399,95 Yaesu CPU-2500RK Yaesu FT 227RB Yaesu FT-225RD Yaesu FT-625RD Yaesu FT 901DM Yaesu FRG-7000 Midland 13151QA Drake MN-4C Swan MK II Avanti AH151.3 Tempo S-l Bencher BY-1 Drake TR7 DR7 CDE Ham 4 CDE Tailtwister Alliance HD 73 Hygain 3750 Kenwood TS 520SE Kenwood TS 120S Kenwood TS180S Kenwood TR 7600 FM Mob e 2 Mtr. Mobile 2 Mtr. Base 6 Mtr. Base H F . T ranscti ver

Tss

The TS-180S is Ken woods top-of-thelme all solid-state HF SSB CW FSK transceiver New circuit-design technology has been incorporated throughout the transceiver, resulting in optimum receiver and transmitter performance, as well as advanced operating features that every DXer, contest operator, and ail Amateurs would desire for maximum efficiency and flexibility. Digital Frequency Control DFC). including four memories and manual scanning. Memories are usable in transmit and or receive modes....

Jefferson W

The Tri County ARC hamfest will be held on March 16, 1980, at the Jefferson County Fair Grounds, Jefferson. Wisconsin. Advance tickets are 1.50. Reserve tables are 200 in advance and a 6-ft, space Si.00, Send an SASE to Glenn Eisenbrandt WA9VYL 711 East SU Fort Atkinson Wi 53538. The Catalpa Amateur Radio Society will honor Dusty Dunn W8CQ on the celebration of his 60th year as a ham on Saturday, March 22, 1980 (Dusty's birthday), at the Stephenson Club. Hazel Park Ml. The cost of the banquet...

Around The Bands In December

Possibly the high poinl was an operation from the Central African Republic, TL0BQ, by KA1BQt KA1BOH, and I8MPO. Their week-tong SSB only operation pretty much put the demand for this one to bed, except for those on the CW Honor Roll, however, who were stymied in attempts to get a Morse con tact. Plans for an operation from the Congo by this group were thwarted. QSLs for TLOBQ go to Giampaolo Nucciotti IBK0B, V, Fracanzano 31. 80127 Napoli, Italy, SM3RL fired up from the Mai-dive Islands as...

Labbench Variable Power Supply

Short circuit protected by current limit Uses tC regulator and 10 AMP Power Darlington. Very good tegul& tion and low ripple Kit Includes pc Board, all ports isrge heatstnk and shielded transformer 50 MV TYP Regulation *l5 99KtT LED BAR GRAPH AND ANALOG METER DRIVER New from Natronai Semi LM3914 Drives 10 LED directly for making bar graphs, audio power meters, analog meters. LED oscilloscopes, etc Units can be stacked for more LED's A super versatile and truty...

Fdf

The XR221I FSK input should not exceed 3 V p-p and it will limit with only 10 mV. There should be little problem driving this IC directly from the cassette s audio output No other adjustments are required, and the remaining circuitry is simple T2L and RS232. In order to operate the modem at higher speed, the XR2211 bandwidth must be increased For approximation purposes, the mark frequency is made the same as the baud rate and the space frequency twice this value For example, 2400-baud operation...

Info

Fig. 1, 5150 buffer(Design by John Delaive VE4YD and Gary Mills VF4CM board by Bert Franz VE4BF design box and drawings by Fritz H. Ftellmuth VF4XDJ negative-going TBMT Transmitter Buffer Empty) signal from the Baudot UART The Q output goes low for a period which is set by the time constant on pins 14 and 15 of U10A 1 he low output also resets the strobe flip-flop and prevents it from strobing until U10A has timed out. Connected to pins 1 and 3 of U10A are two RS flipflops. These override the...

Slack

Fig. 3. Phit Satas A D5X 707 Auburn Drive Richardson TX 7508 The Heathkit HW-2021 two-meter walkie-talkie didn't stay on the market very long, yet it was quite a bargain when you consider the accessories that came standard with it The mead pack, flex antenna, and charger would add 50 to 75 to the basic price of any other walkie-talkie, not to mention the money saved by having to transmit offset and an ex* ternal handset Read on and see how to c on eft this...

When quality counts

Do not be fooled by the low prices, these brand new lab quality frequency counters have important advantages over instruments costing much more. The models 7010 and 8010 are not old counters repackaged but 100 new designs using the latest LSI state-of-the-art circuitry. With only 4 IC's, our new 7010 offers a host of features including 10 Hz to 600 MHz operation, 9 digit display, 3 gate times and more. This outperforms units using 10-15 IC's at several times the size and power consumption. The...

Entries

73 Magazine, Peterborough NH 03458 USA To ext han& je SST pictures ith as many statons in a*. man parts of the world as possible during the < ontest periods All amateur frequencies between J 5 and 29.7 MHz where SSTV ts permitted Exchange of pictures must include callsign, RST report, and consecutive contact number starting with QQ1 FCC rules require a verbal exchange of caltsigns for US stations Do not include the contact number in the verbal exchange. One (l) point I or eac h station...

Reset M

Print station mas not peen lil& fifp* pf int go to 160 fpint -enter nahe of l n te5t * pate* c'f'efatgris) * p f. in t l i r. r j t t PRINT -FNttk CONTEST LOOTING FQRnAT* PRINT linput t'* print t 'contest logging formati * f print PRINT CONTEST LOG NOU OPEN * PRINT if 'stop' then 160 reset i2 ltnpui igfp* let xt-skii* i ihtf 1 6) if then 70 if riqf f i 2 then 790 print a*f* f linput try and compares the contents of these spaces with the terminal-input entry The first 6 spaces will...

Texas Towers

Texas 730 4 74 9 a.m. - 6 p.m Mon-Fn, 9 a.m. - t p.m. Set A Texas Communications Products Company iTeXCOMI 20G 29.50 2SGS3SS J5GS6 .50 55G 104.50 HDBX4B Free-s landing 4S-ft- tower ilBsq.ft) . , . 305 HBX56 Frue-Standing 55-fl tower O sa ft). 335 FK254B 4 -ft 2E> G Foidover tower 599 FK 2556 5B-ft 25G Fold over- to war 566 FK256B 684t 25G Foldover tower 729 FK4& 4 43-ft45G Fyldover tower 339 FK45& 3 58-ft 45G Foldover lower 929 FK4563 6B-ft 45G Poldovef tower 999...

Icom Ic compact MHz all mode transceiver

Loom's K gt 551 is an all mode 8 meter unit in a compact, easy to use instrument which uses a built-in microprocessor for frequency control and scanning. The no backlash, no delay dual VFO light chopper system Is included as a standard feature and provided spilt frequency operation as welt as corn pletely variable offsets. It covers 50,000 MHz to 53.999.9 MHz and features a 8 digit frequency readout, 2 digital VFO's, built-in AODC power suppty, variable output from 1 to 10 watts, dial lock...

Larue Electronics Cushcraft Antenna Headquarters

CUSHCRAKT AJMTLNNASr 2-M TER A32-I9, AU4-lln AH7-4, A147-II, AH7-20T, AM - n AFM 4D. AR-2. AfUt-2 AMS-H7 lt ATS-147h 2U . 214EB, AlJ-SK, Al4-SJg, AK-VPR, A22-SK, A147-VFK, ARX-2K AND 228-VPK- A 50-5, AS0-6T A50-10. AS35 SK AND AR-t, 2 20-MHZ- A220-7, A22 MI. AFM-24D, AMS-12Q, ARX-120 AND AT amp -Z20 4 0-MHZ. A4JD-11, A -M-44D AND OSCAfi AHT MBh Al44 tOfl, A144-20T AND A452- 0T. HF I0-3CD, 1 MCD 1S-3CD, Ji- CD, 2IMCDf AJ amp -.1, ATE 34, ATV-i, ATV-4 AND ATV-5. BLITZ BU 5 LAG- AND 1 AC-2. ICX M...

Partridge Electronics

Kent, England i .Vip '.in Tqider noijir 0S dtrpctIV F-194 U BANDPASS FILTER gold-piatet twin turied cavity cesignea for the 14 to 163 Mhz range Has tuning controls and type N connections. Size 6VftxSV amp ximff, 6 lbs. sir We have similar iders 'listed below i which can be converted to amateur usage according lo con versions by WJFXE 2 flG and J 80 Ham Rad-0 used 12.95 unused, 15,95 M92 U of taa U used only conversion to Z-meters F-196.U 063-1M or F 196 U Mitt...

Itx

Schematic diagram of the compressor circuit incorporated in the PRO-W. is shown in Fig. 5. Note that if you use only this half of the chip, it will be necessary to connect pin 13 B and the components associated with pin 1 The audio input connects to pin 6 Since the NE571 has a high input impedance, a small disc capacitor is used to block dc lt A dynamic microphone will not provide sufficient drive A stage of preamp-lification with approximately 20 dB of gain will be required ahead of...

MODEL

This new Signalcrafters SWR Power Meter is in a class by itself. Signalcrafters custom-designed integrated circuits compute SWR automatically, thus eliminating need for set or sensitivity'1 controls. The built-in analog computer operates over the power range of only one watt to several kilowatts with unparalled accuracy,Our auto-ranging feature automatically selects the proper range of 0 to 20, Oto 200, orOto 2,000 watts according to the RF level detected on the transmission line and indicates...

White Tail Deer Award

The Mid-Michrgan Amateur Radio Club has announced the first of a series of awards featuring the wildlife of Michigan. The certificate is available to ail licensed amateurs and shortwave listeners. The White Tail Deer Award requires contacts with two Mid-Michigan Amateur Radio Club stations, or contacts with one MMARC station and three White Tail Deer Award certificate holders. For Novice applicants, the requirements are one contact with an MMARC station or one contact with a White Tail Deer...

Yl International Ssbers Qso Party Cw

Two 5-hour rest periods are re quired during each contest period CW phone . AW bands wilt be used and the same station may be contacted on different bands for contact points, but not for country multipliers. The country multiplier is used only one time. Two meters may be used, but no repeater contacts are allowed. Any member desiring to enter the DX WK team category should immediately send a request to Lyle F. Shaw. 52340 Tallyho Drive, South Bend IN 46635. For record purposes, requests should...

Write For Complete Details Or See Your Local Klm Dealer

20,15, amp 10M- FORTHE MATURE HAM ONLY KLM 17025 LAUREL RD MORGAN HILL CA 95037. 408 779-7363 See Fig. 1. The TR-7 multiplexed display components which drive the DFD-MCC are U9018, U9021, and U9025-14508 dual 4-bit latches used for the binary-coded decimal BCD , and U9028 a 74LS145 BCD-to-decimal decoder driver used for the digit selection To accomplish the demultiplexing of the TR-7's multiplexed frequen cy display, I used six 7475 quad latches U1-U6 , and two 7402 quad 2-mput NOR gate chips...

Mfj Phone Patches

MFJ. famous for its quality line of amateur radio accessories, has just released two telephone patches for amateur radio applications. Since both patches models 620 and 624 are identical except for the signal level meter, our review is applicable to both models. The MFJ Telepatch is fundamentally a hybrid phone patch designed to transformer-interconnect a telephone line, receiver audio output, and transmitter microphone input. To prevent the receiver audio from tripping the voice-actuated...

T

older tube rigs are more fun when you give Phil Sabs ADSX 1700 Stockton Trait Piano TX 75023 After a relatively long period of inactivity due primarily Lo the inconveniences of apartment Iiv-ing, I again became involved with ham radio. Unfortunately, the rather traumatic payments for a Fig. 7, V8 socket 9006 , left and VU socket 6AL5 . Fig. 7, V8 socket 9006 , left and VU socket 6AL5 . new house dictated the expenditure of minimal funds for my re-entry into this hobby. This being the case, was...

Confidential Frequency List

Identifies 5,000 non-broadcast shortwave stations telephone, coast, military, spy, etc. from 4-26 MHz. 6.95 ppd. Just Released 34th Edition WORLD RADIO TV HANDBOOK Bible of the SWL comprehensive list of all shortwave broadcasters with all detai l plus special articles. 14,95 ppd. Just Re teased GUIDE TO RTTY FREQUENCIES First time ever details on 3,500 radio teletype stations with mfo on how to ID special codes amp languages. 8.95 ppd.

Skytec Cw Speaker

Drawing Having Drunk With Fellows

During these days oi rapidly skyrocketing inflation, it's becoming increasingly difficult for one to truly get his money's worth when buying almost any utem of an inexpensive nature. That single situation prompted me to write this report on a very outstanding and beneficial unit - the Skytec acoustically tuned CW speaker. Originally, this little gem captured my attention by its attractive and novel appearance. Once connected to my transceiver, however, I found this ,smgie-frequency speaker more...

Wazv

Heath Company, Dept. 011-634 , Benton Harbor, Ml 49022 Heathkit Electronic Centers Units of Veritechnology Etectromcs Corporation are located rn major citres throughou the U S-See your white pages Heathkit Service Techs know their stuff and you can count on them for answers on any Heathkit HAM gear Most problems can be solved nght over the phone. Those that require hands-on service can be brought to one of the 55 Heathkit Electronic Centers throughout the U.S. or sent in to the Heath factory....

To

Check the excellent article, Inside Ma Bell ' by Spenser Whipple, Jr., in the May, 1975, issue of 73 Magazine, page 61 To produce a single tone with most pads, push the two adjacent buttons in any row or column to produce the tone for that row or column. Example Pushing the 2 and the 5 together will produce the 1336-Hz tone, and pushing the 4 and the 5 together will produce a 770-Hz tone. These two tones just happen to be near the middle of the tone range and therefore serve well for test...

Rac

Gl ckner WA6AXE KH6 2775-B Hetu Place Wahiavsa H 96786 another breakthrough for blind hams The following article describes a digital con-verier whit h was designed and built by WA6AXE,3 for the visually-handicapped person The device converts the binary-coded decimal BCD output which drives the 7 segment LED frequency display of the DRAKE I R-7 tnto Morse code audio output. After completing my fast project Morse Converter for DMMsf' , it was time to begin work on a new converter which...

Transceiver

The TS-120S is incredibly small due to miniaturized circuits and all solid state construction It measures 9M W x 3v H x 1i-9 16D and weighs only t2 32fbs No tune up required. The single-conversion PLL system improves transmission and reception and makes iF shift operation and mono-dial indication available on any mode. A built-in 6-digit digital frequency display indicates the operating frequency to 100 Hz on any band and in any mode without recali brat ion. Four fixed channels available. One...

Wideband Preamplifier

2 to 200 MHz band width - 3db points 19 db gain 50 ohms input amp output impedance Tiny PC Board si e 7 8 X 1-5 8 Absolutely no tuning required Extremely stable Draws only 20MA at t 2 v dc Great way to increase sensitivity of receivers, counter, etc. Instructions provided, full warranty. SHIPPING INFORMATION ORDERS GVEP 15.00 WILL BE SHIPPED POSTPAID EXCEPT ON JTEMS WHERE ADDITIONAL CHARGES ARE REQUESTED ON ORDERS LESS THAN S15.G0 PLEASE INCLUDE ADDITIONAL Si.00 FOR HANDLING AND MAILING CHARGES...

Inc

925 Sherwood Drive Lake Bluff, II 60044 its all there. The Microlog Split Screen Package1' will get you on silent RTTY and CW with any rig, any mode and with features you will find most desirable. S999 for complete AKB-1 keyboard and AVR-2 decoder using your TV shown . Compare on quality, features and price we're sure you'll stay with MICROLOG. 4 Professional Drive, Suite 119, Gaithersburg, Maryland 20760, 301-948-5307. have their splnis lifted I know that when I go through some ot the cards...

Charge

Microlog Akb

I 1 1 4 eTt 2 7162 818 26 5 e1 - I t- xi 2 xV3 xV4 elt. lt 2.718 T g, 3, Situations providing insights into the nature of epsilon. a Population growth of bugs whose main occupation is begetting buglets. b Population growth of dollars in two kinds oi accounts, c Population growth and decline of electronics in RC and RL circuits, d Simple number sequences for determination of population parameterepsilon, or epsilon raised to an exponent x. Note r is a small resistance much sma...

Mo Residents Call Collect

Frank Butscher H '6SZS 6850 Westmoor Way San Jose CA 95129 part XXIII the Sears Roadtalker 40 Affectmg all things, change brings us mto the future, where a vener able old name like Sears, Roebuck and Co is simpli-tied to Sears, and where terminology such as microprocessor, phase locked loop, etc The ham hands have lt hanged their makeup m the past 2r gt years T he AM heterodyne alleys of 20 and 40 meters now ring with the cacophony of sideband and automatic computerized CW IDers. Even the...

True Rms Digital Multimeter

Compare these features arid you will buy DSI 5510 - 50 Hz to 1 GHz 8 Digits not 6 or 7 5500 - 50Hz to 512MHz 1PPM TCXO not 1.5PPMor10PPM Made in U.S.A. Resolution 1 Hz 50MHznot 10Hz With the introduction of the 5510 DSi has filled a long standing void in the frequency counter market place. You now have the choice of selecting a 512 MHz mode 5500 for around a 100 or for only 30.00 more you can Ouy an 8 digit 1GHz counter modei 5510. With this i GHz capability the new woridof 960 MHz is...

Clutterfree Modular Consoles

Tn the frantic world of electronics merchandising, manufacturers and users of equipment often overlook the obvious-like what to set it on Even the most diligent reader will fail to find more than a tiny handful of furniture manufacturers in the hundreds of equipment ads which support the pages of a major hobby magazine ike 73. Fortunately, at least one capable woodworker recognized the importance of rugged quality, professional appearance, and reasonable cost Clut-terfree Modular Consoles, a...

Amcoder

Still Only 40 h2 wide Single signal - no QRM QRN reception Immune to impulse igmtPOn noise StHl tape quality audio with TTL compatable signal for computer interface applications No noise Appears in the AMCODER output. NOT A FILTER Its CW regeneration NOW - di into the noise for the weak on as without front end overload with our n amp w AGO module. No locking on noise. No mods to your gear. Jusl plug into phone jacK. Speaker Or phone Outputs with bypass swtichmg when not in use No external...