Texas

WA5UNH (Wide Dalls (No cads given 53.55 52.95 High power duplexer. Operated by Regional Emergency Communications Assn. Northeast Texas WA6LDL Tyler 230 ft high. 30W. Operates 6 a.m. to 12 midnight. No calf given (Fort Worth 53.05 53.15 WA5YTM (Fort Worth) 146.34 146.94 Texas VHF-FM Society, Fori Worth chapter. 50 mi. radius. Lubbock WB5BRY W5YUO Abilene 146.34 146.94 W5NFCO No call given I Port Arthur 146.34 146.94 W5QGG (Midland). 146,34 146.94 Mo call given (San Angelo) 146.34 146 94 W5TOC (B...

Devices

Hot Carrier Diodei HP28G0 90tfr 12 S10.0Q Matched by HAI_____4 S4.25 IC'k f ft L 900. 914 60 f L 923 90i MRTL MC790P, MCB9QP S2.00. 10 S19.50 MC724P. MC789P. MC792P, MC725P Si .05, 10 S9.50 Also available MC723P, MC788P, MC880P. MC767P, MC9760P. OP AMP SN72709N DIP , SN72709L (T0-5). SI.25 TOROIDS Indiana General CF102-06, CF102-Q1, CF101 Qi SOrf CINCH ICsockets, 34-DIP.8-ICS 60* HAL DEVICES Add Postage, send for complete list. Box 365 L, Urbana, Illinois 61801 COMPACT, HIGH QUALITY TELEVISION...

Testing

After looking once at the Ten-Tec RX-10 receiver, you'll ask, Where's the bfo You won't find it SSB and CW tune just like AM no bfo, no switching from mode to mode just tune the station in and peak the antenna trimmer. That's all. The RX-10 is a solid-state, four-band receiver of surprising and impressive quality. For those of you who have read the articles that have appeared describing the direct-conversion system* of detection and wondered whether to homebrew and experiment with the circuit,...

Varitr On

The Inoue IC-2F, distributed exclusively by Varitronics, Inc., has 6 transmit and 6 receive channels that can be independently selected with concentric switches. Even though the rig is packed with compact circuitry, the unit is remarkably serviceable, owing to the swingaway construction of the subchassis elements. The receiver is rated for 0.4 p ' for 20 dB quieting, which has proved realistic. The selectivity is adequate for amateur mobile and base operation, but you won't likely be able to...

Frequency Stability

At K-W Industries. the greatest possible degree cf accuracy is used in the manufacturing of K W Crystals and related electronic.'equipment. We guarantee our crystals indefinitely aga i n st defective workmanship and materia Is. And we otter variety. You'll find models i 11 the K-W Iirin for every requirement. All crystal needs, whether they require standard models or special orders, are tilled with the'S& mo degree of care. Send today.tor .additiorinl information arid ourlatest price1...

Digital It

Tom Woo re WB6BFM 320C StiUman Upland CA 91786 The DIU is unique in that it uses a simplified computer address principle for selecting the information it is programmed to send. There are four basic units in the DIU The counter establishes which sequence is next. The matrix determines what instruction is next by the sequence. The signal logic converts the instruction information into the actual signal to be sent. The tone oscillator sends the requested signal. The whole system is based on a...

JFMf

If you're an active ham who uses sideband or AM, you're probably wondering why everyone is making such a fuss over all this 2 meter FM activity. Well, it does have a few things going for it. And it might even win you over. Take the ordinary receiver noise you're used to hearing, for example . . . it's one of the most undesirable characteristics of AM radio, but it's practically nonexistent with FM. The reason Squelch Highly efficient squelch circuits are standard equipment on FM receivers....

Cancer Victim Aided By Hams

On September 21 Marshall Jones, WA2MID answered YU1BCD in Pan-cevo, Yugoslavia. YU1BCD needed help. A five-year-old girl who had just been operated on for cancel- was in desperate need of a new drug that was available only from U.S. sources, Marshall called Dave Marks (W2APF) who has had a great deal of experience ill assisting in other similar situations. Uncle Dave started things going. The first shipment was lost, but finally the drug was delivered. The happy ending of this story is that the...

Tempo

Henry Radio's Tempo FMV transceiver is one of the more compact of the imported units. Housed in a sturdy one-piece metal case, the unit comes with power cable, microphone, and one set of crystals 146.94 (transmit and receive). There are 8 positions on the channel selector switch and sufficient crystal sockets for 8 transmit and 8 receive crystals. Cross-wiring for accessing one crystal in several positions is a simple process. The transmitter section is rated at 10W output, though the 73 test...

Fm Books

This book is largely a collection from FM Bulletin, edited by K67MVH and WA8UTB. The material is taken from the editions of February 1967 through February 1968. FM REPEATER HANDBOOK K6MVH. Book is required for all repeater operators and must reading for all FM'ers. Only complete book on the subject. It is also one of the best selling books in amateur radio today. THE BEST OF FM A huge selection of FM Journal's finest technical and conversion articles, never before reprinted...

Freck Radio Supply

38 Biltmore Ave., Asheviile, N.C. 28801 (704) 254-9551 - Est. 19281 Send fat our free list of used equipment over 300 pieces to choose from Also new in stock Collins Drake -Kenwood Galaxy Tempo Signal 1 WE TRADE HIGH TRY US Bank Americard - Master Charge Tenny Fredc W4WL Sandy Jackson Mgr. Harvey Nations W4VOV Tenny Fredc W4WL Sandy Jackson Mgr. Harvey Nations W4VOV

Waw

As we all know, there are a lot of corrections that should be mnde in the ARRL. Let me also say that there arc some good points, too, One of these is the W1AW code practice. 1 am a Conditional class could be done away with and those who feel they are too far to take their tests would have no room for gripes. Still enjoy 73 as much as ever and hope to see all the fine departments grow. 1 looked at a copy of QST the other day and found it the same outmoded DX gossip sheet as ever. Cathy Be are W...

Frontpanel Selector

Swan600t Schematic Diagram

For either 10-db of ALC, or manual output level control to eliminate external attenuators when driving a king-size linear. Also permits manual power level adjustment, very useful when using the B-500-SSB on limited current capacity automotive electrical systems. I-F SPEECH SIGNAL PROCESSOR doubles SSB talk-power this, plus the 10-db of ALC results in a really potent transmitted signal, 100-Khz CALIBRATION oscillator. BUILT-IN VSWR meter, and S-meter, including front panel monitoring of ALC,...

Put It Ill Together

UNIQUE FEATURES, SUPERB PERFORMANCE, HIGH STYLE THE ULTIMATE IN VALUE. IN FACT, IF YOU CAN AFFORD KENWOOD AND YOU PROBABLY CAN THERE IS NO REASON TO BUY ANYTHING ELSE Whichever is more important to you quality or price the Kenwood R-599 wins hands down. Check these features , they're standard MODE Permits reception of CW, LSB, USB, AM, AM with noise limiter, or FM. FUNCTION Selects receiver position between Standby, Monitor signal from T-599, Slow AGC, Fast AGC, 100 KHz or 25 KHz calibrator....

Signal

Patent VJ f 'Zj D 219106 f Guaranteed GREENE center insulator with BALUN . 15.00 GREENE center insulator NO balun 10.00 DRAGON FLY construction drawing . . . . 5.00 Patent VJ f 'Zj D 219106 f Guaranteed GREENE center insulator with BALUN . 15.00 GREENE center insulator NO balun 10.00 DRAGON FLY construction drawing . . . . 5.00

Info

Quency at the left, you can find the intermod product of these two frequencies at the intersection of the column and the row as you find the distance between cities on a road map mileage chart . The most convenient starting point on the chart will be found on the page where your operating frequency is listed at the top and also on the left. At the intersection of this row and column you will also find your operating frequency. From this point on the chart you can begin listing the possible...

Tentec Rx

Aimed at the portable enthusiast and the Novice, the RX-30 is designed for headphone operation and does not include a built-in speaker. This is no disadvantage to the ham working through Novice QRM or the distractions of portable operation. Whoever heard of a brasspounder not using cans, anyway There is plenty of audio gain with the RX-IO, and the sensitivity is astonishing. Tuning is easy, with pushbutton band changing, and the rig has a jack for a key the RX-10 has a built-in code practice...

Inc

Fipnt R 925 Sherwood Drive Hl- Lahe Bluff, tlf. 60044 Nothing is unusual about the MPF-102 junction FET. There's a 1 ki2 decoupling resistor in the drain circuit to encourage rf to use the 0.001 UF capacitor as a path to ground. Coupling from the source to the NPN bipolar transistor is through a 0.001 ftF capacitor. You may be astonished at the low values of the base-to-ground resistor and the collector load resistor. These were selected to keep gain low and stability liigh. The gain can be...

Geneva

The I ARC convention took place during the latter part of 1970. The technical sessions were held in the ITU council chamber. Representatives of the following national societies were present ARI, ARRL, DARC, Radio Club of the German Democratic Republic, Radio Amateurs Libanais, PZK, REF, RSGB. SRJ and USKA. The convention was opened on the Friday evening by R- E. Butler. Deputy Secretary-General of the ITU. A reception was held at which a number of delegates from an IFRB seminar were present,...

Galaxy

Hy-Gain's Galaxy FM-210 transceiver is all-American. Manufactured in the U. S. with U. S. parts, the unit offers conservative design with plenty of room inside the chassis for mounting tone units or other circuits. With independently controllable transmit and receive frequencies, a great deal of flexibility is offered in terms of selection of operating frequencies 9 possible, with 3 crystal positions for transmitter and 3 for receive. FETs in the front end serve to enhance sensitivity with a...

Bookshop

Replace H23 Tube

All books and items postpaid in U.S.A. unless otherwise indicated. Send cash, check, money order, etc., to Buy lavishly Order today from RADIO BOOKSHOP Peterborough NH 03458 P. J. Ferrell W7PUG 6021 S. 119th Street Seattle VIA 98178 The old H23 Handie-Talkie was a hybrid job The receiver was a mishmash of vacuum tubes and transistors. This article tells how to eliminate the tubes in these early versions and end up with an all-transistor receiver capable of easily outperforming the later stock...

A M K

18th Edition of the famous E amp E RADIO HANDBOOK by William i. orr. w6sai. Completely updated edition of the famous communications boot that is the electronics industry standard for engineers, technicians, and advanced amateurs. Explains in authoritative detail how to design and build all types of radiocommunications equipment. Includes ssb design and equipment, RTTY circuits, latest semiconductor circuits, IC's, and special circuitry. Order 24020, only 13.50 Radio Amateur's F-M Repeater...

Wanta Listen

WHAT IS A CRYSTIPLEXER TUNER it provides instant, precise direct-readout selection of 200 receive channels with no crystals to buy WHAT ARE SOME OF THE OTHER FM-27 FEATURES ALL SOLID STATE EXTREMELY COMPACT 12 WATTS OUTPUT BUILT-IN 41 2 INCH SPEAKER PROVIDES SUPERB AUDIO DISCRIMINATOR METER 25 mv sensitivity speech processing rugged reliable 10 independent transmit channels mobile mount DIMENSIONS - 3v2 h x 7 w x 9 d. associates, inc. littell rd., east hanover, n. j. 07936 professional quality,...

Test Equipment

TS-413 U Signal Generator, 75 kHz to 40 MHz in TS-418 U Signal Generator, 400 to 1000 MHz, 6 bands, precise calibration from 1 MHz crystal AM, CW, PM, power Dutput 1mw 225,00 oscillator, has modulation meter, CW or AM, ,- ., , 400 1 OOOcps, variable 0-50 and RF level meter TS-175 U Frequency Meter 85 to 1000 MHz, 0 to 1.0V. ideal for amateur, marine, aircraft, accuracy 0.05 , audpo modulation 1000 cycles hobbist for IF and receiver alignmentt . . H.P. 525A Plug-in Frequency Converter for TS-382...

Tristao Tower Co I

Duce informative features on Japan, musical varieties, news and commentary, as well as aural instruction courses in Japanese. The news and commentary segments account for more than half of all programming. Features attempt to introduce and interpret Japan from ail angles sociological, economic, and cultural. Music ranges from traditional Japanese and other Asian strains to present-day pops of both Japan and the West. Proof of Radio Japan i growing audience is found in the stacks of mail that...

Letters

Article Index III researching amateur radio articles via December issue indexes, I t'ind that your Dec. 70 Index is possibly tile worst in all of hamdom. Please change Thank you. Alfred A. Assaiante 213 St. James PI Merchantville N.l OB 109 Why don't you get out ahead of those other magazines and give us some articles on 160 meter homebrew gear of all kinds A good transistorized receiver, QRP xmtr. and anything else that would fit in. There arc still some of us who like to homebrew yet. And...

Preselector

What is desired of a preselector Here are 10 points J believe to be pertinent 1. Selectivity for rejection of images not ne cessarily for rejecting adjacent-channel signals . 2. No gain. Even a small loss would be acceptable. Too much gain could degrade the cross modulation of the intermodutation characteristics of the receiver. 3. No increase in cross modulation, intermodulation, or noise. 5. High tolerance of impedance match, both for the input and the output circuits. 6. One control single...

The Allnew Bssb Professional Watt Transceiver

80 Thru 2-Meter Complete Station Designed For The Professional Amateur amp Commercial Applications 2-WAY SLOW-SCAN TV ISSTV - THE NEXT BIG DEVELOPMENT IN AMATEUR RADIO - ELECTRONIC QSL'ING WHILE RAG CHEWING ON SSB OR FM. THE B-500-SSB probably is the World's most sophisticated transceiver, utilizing techniques that significantly advance the state of the transceiver art. Four years of full-scale professional engineering have gone into its development. It represents the very finest communications...

Wawasee Electronics Co

The Black Cat Linear Amplifier PO BOX 36 219- 457- 3030 Syracuse, Ind. 46567 LABORATORY CLEARANCE SPECTRUM ANALYZER SINGER METERICS SPA-1 2 tuning heads, 54-4000 MHz continuous, manual, like new, orig, cost 5000 . . 395.00 SINGER METERICS SPA-3 Range 0 15 MHz, 200 CDS resolution, like new. oris, cost 4200, manual inc. 350.00 R mount SYSTRON DONNER Mode 1031 7 nixie tube. 0-1 MHz with HP520 10 MHz scaler, combined range 0 10 MHz, manuals, orig. cost 3400 S350.00 R mount HAMMARLUND SP 600 JX...

Wiudo

How about looking around for another editor. Frankly, the magazine is not too interesting to a lot oT us readers. It seems you are leaning more toward the VHP and many of us could care less for high frequency. RTTY UGH The mag is not as good as it once was but then again QST is worse, and 1 have been subscribing to it for almost 50 yrs. On the other hand, maybe it is me when you are 65 and retired, things seem lo bother you more, you are not so permissive. T. E. Burmeister WHHSS 862 Quarry Dr....

Wpcd

WB2UDF WA6GLD W0RRS WA90TH WfSDAK WA9NSR W40PM MHz Phone 100 WA2FQG WA2SFP K9PPX W6YMV WA4WTG W9NNC WA5DAJ WSWRP WA0OA1 WB20B0 WA5LOB W6MEM K4VKW WAIEUV W2VBJ K5HYB WB2RLK WA8FVK W4SYL W1EED W1PCD WA7BPS Figures by Andy Anderson - Music by the Top Notches. Free Western Square Dance Demonstration. Casual or western dress, please. Sunday 7 AM Registration amp Free Continental Breakfast. Largest Flea Market held irf the Roanoke Division. All dealers invited. No fees, Contest - Homebrew - Mobilerig...

Clegg Synthesis

One of the most important developments in the FM era - indeed, perhaps THE most important - is the successful manufacture and marketing by Clegg Associates of the FM 27, a transceiver that incorporates a fully frequency-synthesized receiver section. To monitor a specific frequency, the operator merely sets the two receiver controls to the numbers corresponding to the 146 MHz channel. To monitor .94, the operator sets the first control to 9, the second one to 4. In the photo, the receiver is set...

Racism Charged

The Commission, by the Chief, Safety and Special Radio Services Bureau, under delegated authority, having tinder consideration the suspension of the General class amateur operator license til Russell hi. Jant7.cn, 12149 Indiana Avenue, Riverside, California, which is scheduled to expire August 8, 1973, has released an order calling for the suspension of his license. According to FCC examiners, the licensee, while operating amateur radio station WfrTBN, willfully and repeatedly transmitted...

Staff

Circulation Phil Price Barbara Block R. K. Wildman W6MOG Wayne Peeler K4MVW T. M. Graham W8FKW 12 What's Really Different About FM K6MVH 18 Aftermath A Noise Blanker That Works W8RHR The author returns to the drawing board 20 FM Intermodulation on 2m W6YAN Chart for locating interference sources. 28 Hotrodding Motorola's Hybrid HTs W7PUG A commercial bid for the 450 market. 30 Stability Without Crystals Staff Introducing the Sentry Modcom, whatever that is. 32 Switching Remote Linears W0HKF 34...

Wfbs

WA9LIV Waukegan wideband 146.34 146.76 W9BYZ 9 Genoa 146.34 146.76 No call Rockford 146.82 146.94 WA9GCK Bloomington 146.22 146.94 WA9EAM Petersburg 146.34 146.94 WA9EAT Joliet 146.2B 146.98 WA9WVB Chamgagne Urbana 147.48 147.18 WA90RC Chicago FM Club 146.34 146.76 Tone access 1800 Hz North Receiver 2000 Hz South Receiver 60W transmitter at First National Bank Building, Chicago, lilinois. Antenna height 880 ft ERP 200W. Six meters Tone access 1800 Hz. SOW transmitter in downtown Chicago....

Marketplace

Standard C826m

. .A detailed rundown on all the current models of 2m FM transceivers. FM's fantastic rise irt popularity has brought about a revolution in the ham market, with manufacturers young and old competing for a share of the business. 73 considered publishing detailed product reviews on all the equipment available, but new equipment continues to make the scene at a clip far too furious for reviews to keep pace. As an alternative, we decided to publish capsule reviews, where all the 2m FM transceivers...

Clegg

The Series 25 Clegg 22 FM'er is a radical departure from the traditional, and the manufacturer gambled against heavy bets within the FM fraternity that a tunable receiver wouldn't make it. Clegg wins Though the unit is designed primarily for base station applications, with its built-in ac supply, circuitry has been incorporated to allow use in the mobile by direct connection to the 1 2V battery. Performancewise, the 22'er FM is almost incomparable. The receiver is remarkably sensitive...

Specifications

with 6360 output tube Frequency Coverage 144-148 MHz RF Output Power Frequency Deviation Frequency Stability Spurious Radiation Number of Channels 12 Channels, 3 supplied Channel 1 Receive 146.94 MHz Transmit 146.34 MHz Channel 2 Simplex 146.94 MHz Channel 3 Receive 146.74 MHz Transmit 146.34 MHz Greater than 10 Watts Adjustable to 15 kHz maximum .001 or less Greater than 80 dB below Carrier Modulation Transmitter Control Power Drain Transmit 50 Watts DC Receive 0.5 Amps Transmit 4 Amps AC 117...

Varitronics Pa-50a

The Quality Leader In Amateur FM At Competitive Price Always the quality leader, see December and January 73 Magazine, and reviews in January QST and March CQ the IC-2F remains the same superb performance, deluxe features, 1 year warranty . . . TRANSMITTER RF input power 20 watts RF output 10 watts minimum maximum frequency deviation 15KHz adjustable Automatic Protection Circuit APC NEW Not offered in any other transceiver on the market. Absolute assurance of final PA protection from shorted or...

Crystal Discriminator

'COK TO PEAK MIN. 50 KHi or irln flltToriion, use up to t 12 k i0i 3evlqHoil. CIRCUIT INFO, INCl'p 0.7 MHZ-XTAL DISCRIMINATOR-MODEL AE-IC TO 15 KHZ DEVIATION-TEST CKT INCL. S X TA L - 11,5 MHZ 60 08 aw 100 KHZ MAX.-50 OHM TERMINATIONS J MATCHING XTAL DISCRIMINATOR MOD A L-l d- I TO 15 KHZ OE VI AT I ON-DOPE SHEET INCL.-PlU iPlH

Communications

See sound-on-fiim crews show up at your next hamf est SEVEN Remember that the average reader does not understand technical and abbreviated terms such as RTTY, CW, SSB, etc. Keep it simpie, yet interesting and informative. For example Single Sideband the type of radio telephone communications used by astronauts as weil as amateur radio operators will be the topic of discussion at the Podunk Amateur Radio Club Meeting Tuesday, June 30. Note the reader now has probably been introduced to the term...

National Hro500

After five years of making waves on the DX bands with a transceiver plus great big linear amplifier, it takes some getting used to, making virtually the same waves with a little box that I can lift with one arm . . . well, two arms it weighs 59 pounds. And that includes the built-in power supply and loudspeaker. The NCX-1000 is sure a far cry from the first National rig that I owned way back in the dim, dark past. The National 600 was a 600 watt transmitter first marketed back in the late 30's....

Virginia

WB4HCX W4GCE K8SXO Ridgeley , 146.76 52.525 W4DXC Richmond 52.72 52.640 K8SXO WB4KNX Charlottesville Emergency Amateur Repeater Society. No tones wideband in narrow out. WB4KNN Newport News 40 mi. . . .146.34 146.94 W4NJE Richmond narrowband 146.34 146.94 Whistle-on No call Virginia Beach 146.22 146.97 W7DAQ W7DAO VE7MQ Seattlel 146.34 146.58 Seattle K7GMR 450 ft elev. Groundplanes. Very sensitive receiver 40W transmitter. Cavity homebrewed by K7KSZ. K7TGH I Richland 52.525 53 290 VE7APU K7QKL...

Channelized Tone Burst

Audio spectrun showing tone a Jocaiions. applications and tone generation techniques. Do a little snooping. One of the most surprising characteristics you'll notice is the overall absence of those old cliches you hear so much on AM, Such expressions as one-eyed monster, snore shelf, big switch, bucket of bolts, down the old log sheet, and handle have been in most cases replaced with their generic terms. It may seem hard to tear yourself away from those old habits, but you might even...

Swan

The FM-2X by Swan Electronics is a 12-channeI transceiver with a rated rf output power of 12W. According to Swan, the unit comes factory-equipped for crystals on 146.34 146.94 and 146.94 simplex. 73 has not yet had the opportunity to check out this unit, but the specs are as follows Harmonics and spurious radiation better than -60 dB frequency deviation is factory adjusted to 12 kHz, but may be increased or decreased with integral pot. The receiver is rated at better than 0.6 V sensitivity at...

Simpson

Simpson's Model A FM transceiver steps into amateur radio from the nearby VHF FM marine band, where it has been and still is serving boat owners and yachtsmen. The Model A's rugged construction is probably attributable to this heritage the rig is built like a battleship, and from first appearances one might guess that nothing could damage it. Although a smidgen larger than most of the other solid-state 2m FM units, the Model A's power output is slightly less than average - about 7.5W at 13.2V...

Iui

This is a completely self-contained power amplifier designed specifically to increase the power output of low power transmitters. It requires no modifications to operate on rtty, fm, mew, etc. in the above listed freq. range. It will deliver 250 to 300 watts out when driven by a 2 or 5 watt handie talkie The power output can be increased up to 700 watts with a very simple modification. Change tubes to 4CX250B's, make minor change in power supply, instructions supplied with each unit. Very...

New York

K2H0I whistle on 146.34 146.76 WA2UYI PL 107.1, 151.4, 162,2 Hz 441.75 446.75 W20QI Manorville 2588 tone burst .146.34 146.82 W1 BNF Connecticut narrowband . . .147.37 146.98 WA2UWC Greenbrook, New Jersey . .146.58 146.94 No call No call K 1 I No call LIMARC No call given Woodmere, L.I. NY 146.41 146.64 W2DEG Grafton 146.22 146.76 WA2KEC K1TKJ 2 New York City 146.19 146.73 No call iGore Mt. Proposed . .441.0 446.0 No call Belfry Mt. Proposed 441.1 446.1 No call Old Field Pt. Proposed 441.2...

Semiconductors

Instant Circuit Boards-NO ETCH-NO MESS-NO FUSS CIRCUIT-STIK is a complete system of component subelements and materials designed to work together to produce instant circuit boards that are as durable as regular circuit boards. CIRCUIT-STIK ELIMINATES drilling, photo work, and etching. Just stick the pressure sensitive sub-elements down on pattern G Vectorboard. Thev stick down firmly, withstand soldering temperatures, yet can be picked up and moved for circuit changes. In fact, they make...

S

GUARANTEED BRAND NEW SPEC SHEETS LOWEST PRICES SN7400N Quod 2-input NAN1 gate . . SN7401N Same as 7400 but with SN7402N juad 2-input NOK gate SB SN7404N H I inverter 99 SH7410N Triple 3 input NAND gate 83 SN7420N Dual 4-input N ND gate S3 SN7430N 8-input NAND gate S3 SN7440H Ilual 4-input NAND buffer SB G SN7441N BCD-to-Nixie tube driver 3.95 SN7442M tjCD-to-decimal-decoder -.3.95 D SN7447N BCD-to-7 seg decoder-driver 3.95 SN747JN J-K Master slave flip flop .99 SN7473N Dual J-K master slave...

Laboratories

TV And Communications Antennas Since 1921 Asbury Park, New Jersey 07712 201-775-7252 175.00 355.00 39.95 59.00 63.95 Mark Pecen WA9TFY 9 1444 Lawrence Crescent Flossmoor IL 60422 Mark Pecen WA9TFY 9 1444 Lawrence Crescent Flossmoor IL 60422 a simple varacton modulator for going FM In the past few years, FM has become the big thing in amateur radio. It offers dependable, noise-free communication to thousands of hams around the country. If you have an old AM-type VHF transmitter, you can join...

Florida

No call given Starke narrowband 146.34 146.94 Central Florida WB4HAE Tampa, narrow 146.34 146.76 WB4QEN Tampa 444.1 449.1 WB4GLK Okeechobee east central . . .146.34 146.04 area narrowbandl WB4GLK Same 146.94 146.76 W4IKB Chipley _________________146.34 146.94 W4GGU Panama City 146.34 146.76 WB4KLT Ft. Walton Beach 146.34 146.76 Whistle-on, 1800 Hz narrowband. Split site. Receiver Destin, Florida. Transmitter Ft. Walton Beach. Max mum directivity, rcvr north. Antennas approximately 40 miles....

M Waiter

Transistors are now available at reasonable prices that can handle a fair amount of power, even at frequencies beyond the 10 meter band. The 2N2631 is one of these and it was used as the final amplifier in the rig described in this article. Input power to the final is about I2W on CW and when driven as a linear for SSB, an input power of about 8W PEP is possible with low distortion. While I2W is not high power, it is more than the average transistorized rig is capable of running and is enough...

Erickson Communications

4657 North Ravenswood Avenue Chicago, III. 60640 312 334-3200 Hot MOSFET receiver front end Low drain all silicon semiconductors Complete, ready-to-go Connect power and antenna and you're on 1he air Only 339.95 SPECIAL CLOSEOUT Standard SR-C8UEM Earlier version of above, with very similar specs and same 6 month warranty . . .just discontinued. Was 335,00 while they last only 265.00. Send QSL or circle number for detailed brochure Fig. 27. Wiring diagram, 8 MHz tripler. Fig. 27. Wiring diagram,...

Balun

TYPICAL TELREX MOIMO-BAND ANTENNAS 15M3 7 Monarch, 10D8D,3EI 4 KWP, 2-1 2 O.D, 17 boom 20M326 Monarch, 10 DBD, 3 El., 8 KWP. 3-1 2 O.D, 26 boom 2M609 - Monarch, 14 DBD, 6 El., 6 KWP, 1 O.D, 9 boom 2M814 Monarch, 16 DBD, 8 El., ,8 KWP, 1.375 O.D, 14 boom 6M516 - Monarch, 13 DBD, 5 El-, .8 KWP, 1.5 O.D, 16 boom and...... many, many more send for PL-71 Dept. C

Only Telrex Gives You All These Features

Power rating 4 KW PEP ... rain or shine Wind rating survival 110 MPH Patented broad-band coaxial Balun Heavy-duty steel gusset mounting Aluminum boom 2 in., 2Vi in. O.D. x 18 ft. Large diameter, .058 wall taper-swaged dural elements for minimum weight and exceptional strength to weight ratio Stainless steel electrical hardware With a Telrex Tri-band Array you get 49 lbs. of educated aluminum engineered and built to provide many, many years of performance unmatched around the world by any other...

Evaluator

To the serious experimenter, one of the most useful electronic components is undoubtedly the ordinary meter, and in an effort to obtain more precise measurements, an increasing number of hams are turning to the moderately priced surplus and imported units now appearing on the market. As any experimenter knows, however, with such a wide variety of types and styles available, it is virtually assured that no matter what the intended application, the available unit will always have the wrong range....

M M

Varitronics HT-2 is a 2-channel, 2W hand-held transceiver that comes with nicad batteries, carrying case, battery charger, and crystals for .34 .94 and .94 diraet. Sensitivity of the receiver section is 0.4 IV for 20 dB of quieting. The stages of the HT-2 are isolated from one another by thin shielded partitions. The guts can be removed easily from the transceiver housing for service in the unlikely event that such action might be necessary. The unit comes with carrying case, leather strap,...

Varitronics Ht

The HT-2 hand-held 2 meter transceiver is the only handie-talkie currently being marketed specifically for the amateur market. Amateurs interested in small packages and big performance should not overlook this sleeper. This unit was tested more thoroughly by 73 staff than any other FM transceiver, because it seemed to be too good to be true. The transmitter pokes out 2W, and the signal is good, clean, and stable. Early units had bassy audio, but recent models sound almost hi-fi. Deviation level...