Support

Elevation adjustment is provided by two pieces of 2-inch aluminum angle, 2 inches long, coupled by a 6-inch length of 1 4-inch threaded rod See Figure 4. The lower boom section is a 26-inch length of 2 X 6 (treat with perservative stain) Another 1-inch floor flange is fastened to the bottom center of this member (use brass screws). The two boom sections are joined by 3-inch brass butt hinges. Attach the elevation control assembly as shown The completed parabolic (open-grid) reflector should...

Comm X From Valor

A forerunner in the Valor Enterprise family of new products for 1981 is the tHCommunica< tions Extender antenna series. Known as COMM-X, the series presently includes two models, Model GX-144 is designed for 144-148 MHz and is 52 in length. At 35 In length, the CX-22Q model operates in the 220*225 MHz range. Both models feature adjustable whips designed to allow field tuning for optimum vswr, typically 1.5 1 or less at resonance, and typical gain of 3 dB over a 1 4 wave standard, In ad...

Mark Cr Repeater

Call oc wrtU lor ip clflciHofii MICRO CONTROL SPECIALITIES Camera So fware. The software to capture an SSI V picture from the Digi* sector card was a fun routine to write. The software is extemely time-dependent and functions as follows. The CAMER routine grabs a picture from the I V camera in a format of pixels line on 128 lines with 16 gray levels. Why such a strange format Wellr the entire format is based upon a number of compromises of picture appearance, ease of programming, and aspect...

Helium

Heavy duty inductors with transparent lube covers. The result of nearly two years of continuous development and nearly fifty years oi amateur and commercial antenna design and manufacture Bassett helium filled antennas are for the amateur who demands the very best in American made- automatic baridth, mrje systems and mobile antennas that are compatible with all transceivers Including the new no tun r'units. Trap systems are fundamental dipoles on each band and do nol require antenna tuners....

Wtch Open

0 fiEFi,FTOR 2 WAVE HE lGn1 his reflector uph and he ran out and lowered it When he carne back he also was 20 over 9 in the Russian Antarctic Station at VostDk His superb 20-meter, full-size. three-element wire beam thought it was on y 20 feet above ground and became a high-angle radiator. Now, what do you do if you have room for only one antenna and yet want to have both DX and local coverage The answer is the old ha If-wave line trick A half-wavelength line will repeat the impedance at the...

Uss

Once mere, the members of the Parma Radio Club will be operating from the WWII submarine USS Cod, using the club can K8UZW. Tne USS Cod is on permanent display in Cleveland, Ohio, Operations wifi start on May 30 and run through September 6 every weekend wtth the exception of Field Day weekend. An attractive certificate will be awarded for 2 way contacts from the ship upon receipt of a QSL card and 30 for postage. All bands will be operated, 10 to 80 band conditions will dictate band of major...

Icom

2112 116th Avenue N.E., Bellevue, WA 98004 3331 Towerwood Dr Suite 307, Daflas TX 75234 Ai iiotetJ ipetfkDTOfu Of oppiorirocire and wbject to chenge wiifxxn nowe of otAqatxn AJ 1COM rate rrfjcomV exceed FCC gutoKxii imibog spurou ftfneutora 40 W, 15 memories offset recall, scan, priority, DTMF Kenwood's remarkable TR-7850 2-metcr FM mobile transceiver provides all the features you could desire, including a powerful 40 watts RF output. Frequency selection is easier than ever, and the dg...

KX

RCA Cosmac 1002 Super Elf Computer 106.95 plus load, reset, run. wait input memory pro- Compaq featuree before ynj decide to Duy any athef comi gt ktir There Is f--. othc computer on the marker Todii gt shat ha-- 11 the d rabli benefits ol me Super EH for so money The Super ESI js a small single board computer that does many big things. It is an lixcelleni computer lor training and tor laarnino programming with its machine language and yet it is easily expanded with additional memory. Full...

Kreco Meter Antennas Special Sale

MQtiNU ON 4 PIPE USE BG-0 U WITH Pl-iSfl VEKtlCAL - . SOUD tOO ShlBT 1 TUBING All JlLUMiNOM CEHAMlC INSULA TO MOUNtS OH 4 PIPF USE RG fl U WITH PL-75 V 8TICAL SOLID OD BADIAL . SOLID tOO AU AtUWttUM CtSAv C INSUI TOD herb kreckman co spruce cabin rd chesco pa 3316 THE ULTIMATE COMPUTERIZED LOG FREE BONUS PROGRAM INCLUDED SUPER DUPER B1'

Info

An interesting kit. small mike picks up sounds and converts them to light The louder the sound, the brighter the light Includes mike, controls up to 300 W. runs on 110 VAC Complete ki WL-1 56.95 Transmits up ro 300' to ffifW any FM broadcast ra- lT dio uses any type of mike Runs on 3 to 9V Type FM-2 has added sensiiive mike preamp stage Produces upward eind downward wail characteristic ot a police siren 5 W peak audio cutout, nrns on 3-15 vofts uses 5-45 ohm vv 'v- ra The clock that's got il...

Ham Help

I am in need ot a schematic for a Dumont 224A oscilloscope ot World War II vintage. I will gladly pay. Gordon Fulp Rte. 3. Box 572A Placerville OA 95667 I'm looking tor a schematic for the Edgecom FMS-25. Thanks. Mark M. Maddox KL7IWT Rte. 3, Box 46 Rapid City SD 57701 After several years of trying to complete my collection of 73 Magaztne through scrounging at hamfests and trying to keep up a subscription through years of military service. 1 need help for the final few issues, i desperately...

Mkb

Complete sel of alphanumeric, punctuation, and special function keys 512 character text buffer 10 reprogrammable 50 character message memories 5-99 WPM1 keyboard seiectable Built-in sidelong Aith adjustable tone and volume Buffer.Memory tuffness indicators 1 year warranty on parts and labor Attractive anodized brushed aluminum and gray wnnkle finish case, only 13.3 9.4 x 3.5 in. RT VftASCII option includes Brag Tape' interface. CW ID, QBF and RY test messages, auto CR LF and LTR FIG shift...

1

Relative signal strength of four antennas for repeaters and local stations in different directions. Normalized strengths for each direction are given by N, S, E, and W. Q' P ATEftS AS SttMAl SOURCES REPORTS FWM LOCAL 5TA J N5 Q' P ATEftS AS SttMAl SOURCES REPORTS FWM LOCAL 5TA J N5 MX SinmiL --H fift vltt Pt WE Hit Ulittf NFW O HM amp E lift fig. 13. Re af ve signal strengths of six antennas in both transmit and receive modes. Wider variance from reports from other stations is expected...

Antenna

J if r .-Another fine member of the famous Henry Radio f amity of superior zir yf LmXlJ'D amplifiers. And we're still convinced that Ift the world's finest linear In its class. The 1KD-5 was designed for the amateur who wants the quality and dependability of the 2KD-5 and 2K-4t who may prefer the smaller size, lighter weight and lower price and who will settle for a little less power But make no mistake, the 1KD-5 is no slouch. Its 1200 watt PEP Input 700 watt PEP nominal output along with Its...

Rfd

I have a Sears and Roebuck CB radio, model 934 36772600, which I would like to convert to 10 meters. This is an acldc 23-channel SSB rig. I would ap preciate any info on converting this rig. Thank you. D.L Hecox WA7IRT 6517 Brookvlew Lane N.E. I need service info diagram on Collins KWS-1 transmitter. Will pay reasonable cost for mfo. copies, etc. Harold D. Wright K4MFN Rte. 1, Box 259 Chancellor AZ 36316 Just a note to say thanks lo all of you at 73 Magazine for placing my request for Harn Help...

Worked Zambia Award

Available to licensed amateurs of the world, the Worked All Zambia Award is sponsored by the Radio Society of Zambia. To qualify for the award, applicants in zones 36, 37. and 38 require 20 points while all other stations need to accumulate a total of 10 points. Each 9J2 sta tion counts 1 point on 7. 14, 21f and 28 MHz. On 1.8 and 3.5 MHz, 9J2 contacts will count 2 points. The same station may be worked on different bands for award credit. Other prefixes used by Zambian stations will count...

To Shield

Details of sleeve balun construction. is frequently not counted-just because it doesn't Have a high price-tag. The truth is, our 8000B 1 Gigahertz is an excellent counter. In fact, it's preferred by many engineers, technicians, and electronic enthusiasts. Not a single competitor on the market today can surpass our price performance ratio. And we've deliberately kept our prices down. First., we've refused to join everybody else in their high mark ups. Instead of charge what the market...

T

Two cabinets basic CT2100 plus separate KB2100 keyboard. RTTY and Morse demodulators and video circuits included in CT2100. Small keyboard size connects with one coil-cord for popular lap operation Streamlined CT2100 cabinet is attractive and small - may also be rack mounted. Satin finish black vinyl front panel with multicolor graphics. 26 control switches red for primary and blue for -secondary controls. 16 rear panel connectors standard phono connectors On screen tuning indicator. LEO...

Collinear Antenna

Meters Colinear Antenna

W8FX 317 Pop r Drive Mi Hbrook AL 36054 Kreco four-element collinear antenna gives an approximate 6-dB gain on 2 meters A quarter-wave radiator, three quarter-wave sleeves, and a ground-plane section constitute the antenna's main components. writer's amateur radio experience, back in the seemingly prehistoric 1950s, heavy, massive plumber's delight beams were all the rage. Indeed, you were in if your tower sported an array that appeared to be crafted by no less than a...

Miniature Automatic Cw Station Identifier

PAfiTS 89 .91 93 95 MULTI-MODE OPERATION MANUAL, SEMl-AUTQ AND AUTO. MANUAL tfGOF - A pu amp hbution switch triggers t-he Nden-rihi which aeys transmitter for ih duration of the ID SEMI AUTO MODE The PTT line activates the iD'er il the rew t irierval rime has lapsed ami ketos me transmitter neyta mrougtiaul trie duration oi the ifl cyt a AUTO MOO Ttie idenMier will the transmitter and ID every time the rt r interval tant mas taosed CONNECTS DIRECTLY TO M CHOPIN E...

Vocom Ht Gain Antenna

Left Drlrjy WB8B H 7 Magazine Staff performance through computer-aided design what has become the annual antenna renewal at W2NSD 1, a pair of four-element Cushcraft Sky-walker monoband beams for 10 and 20 meters was added to the antenna farm. Named for Star Wars hero Luke Skywalker, they are but two of the six members of Cushcraft's HF mono band family, a family which includes three- and four-element versions for 10, 15, and 20 meters. Like that other Skywalker, these antennas have had a...

Ft227ra Frequenzerweitern

Now available for the YAESU FT227RA, FT227RB AZDEN PCS2000 PCS28S0. ICOM IC255A Update the factory-ins la led scanner m your lt lg with our no automatic resume-scan Module No more waiting for a conlJnuous-camer repealer to drop off. Mo more manually-operating me scanner-resume control. Tho scanner for your rig will be controlled exactly as before The only difference is now your scanner wil I sample a received signal toy automatically by passing busy frequency In 8 seconds regardless of whether...

Preselector

Reject images, out-of-band signals. 1,8 to 54 MHz. Up to 20 db gain. Automatic bypass. PTT. 20 db attenuator Use 2 ant., 2 rigs. Copy weak barely readable signals. NEW MFJ-1040 transceiver receiver preselector Jets you copy weak, barely readable signals. Rejects out-ot band signal images Strong signal ability reduces cross modr over loading. Excellent signal to noise ratio. Continuous 1.8 to 54 MHz aN HF amateur, shortwave bands. Up to 20 do gain Gain conlrof...

X

Select KLM performance-oriented UHF VHF Power Amplifiers, and antennas, 1.8 to 520 MHz monobanders, tri banders, log-periodics, verticals, dipoles, circulars and stacked arrays. KLM P.O. Box 816, Morgan Hill, CA 95037 408 779-7363 lass radomes on top of a mast or suspended from the side of a tower inside plastic drain pipe The only difficulty is that the lower sections which carry the greatest radiating current are closest to the ground See Reference 2 for further information on this antenna....

Uss Croaker

The Amateur Radio and Electronics Association of New Jersey AREA NJ radio club will conduct a mint-DXpedihon to Groton. Connecticut, on May 2 and 3. The club will operate from the radio room of the submarine L SS Croaker which will be moored in the Thames River. This event will commemorate the anniversary of the sub's commission into service during WWII. A special QSL card will be issued to all amateurs establishing contact with the submarine, The followmg is a schedule of the activities...

Deerfield Nh

The Hosstraders wil hold their eighth annual tailgate swapfest all day on Saturday, May 9. 1981, at the Deerfield Fairgrounds. Deerfield NH. Admission is 100. which includes tailgating and commercial dealers, Profits will benefit the Boston Burn Unit of the Shrin-ers' Hospital for Crippled Children, Last year we donated 2,058.16. Talk-in on .52 and 146.40 147,00. For more information, send an SASE to Joe K1RQG, Star Route, Box 56. Bucksport ME 04416 Norm WA1IVB, RFD Box 28T West Baldwin ME...