Jf

I joined a local ham ctuk but discovered that there were no club building events or projects. So I picked up a few books from ihe local ham store and began to read. My inieresi was soon draw n to the subjeci of antennas, There is an overabundance of information published on Ihe subject and it seemed a good place lo begin a foundation. Besides, these parts did not appear expensive, especially when mistakes, I mean, design changes, arc made. One of the books I found most helpful was the ARRL...

Onl Y A Few Left

SAM48441 T78 IC Designs & Applications A oomprchonsive L.'II l 11.in of lnk'jir developments for ckvironk cksi n and hasK Jipplitsi- is i-12. 5 m ti'jm ihe V11J1 'i f L Ih' w jy. i 7 f rkf L-L t- V WAV Vit - wh ik. llk.it .Li. iwh Vi ts , > 1 Kl IKMO II I MM * -1 -IK 3 vi pni L .m kjjrn m k lima an hisir < H t r i2ii . i - i u Lrr, mi iin licre near us lunp u> vi m yn kihJy iJiink Sure, > m l.m- isi Ifjun it m > ypnt* II vim w-mt, hin 1li il juM vaste your time, I .'.iiiLini iLk...

Circle On Reader Service Carp

Mississippi Stale, MS 39762 Price Class S79.95 I like test equipment. No, let me rephrase that I am obsessed with test equipment I want one of everything. Ask my wife she will tell you. My collection started 40 years ago with a Heath meter and now I have a shop full of everything. Anyway, the MFJ-208 2 meter SWR Analyzer1 w is now part of my collection. I was a little skeptical at first due to the price of the unit, but I might as well telll you right now that the unit works and performs very...

Scanner Converter

Tune m on me 8G0-9S MHz acuon 'using your listing scanner. Fioquences arc converted wtfi crystal 'eferer< sd to the 400-550 WH rang Instructions are even included on building high performance 900 MHz antennas Weil designed circuit features extensive filtering and convenient on-oHftypass switch Easy one hour assembly or available fully assembled Add our maiching case se tor b professional look. SCN-1 Scanner converter kit 49,95 9CN Watching case set - S14.S5 SCN-1 WT Assembted SCN-1 and case...

Info

Integrated Wefax AFT Receiver and Scan Converter with Qfax software, The Best Price Performance. Period Construct a Wefax APT reception system from individual component receivers, scan converters and image processing software and you'll spend more money for fewer features, poorer performance, no automation and a jungle of wires. With the Wefax Explorer, simply connect an antenna and a few mouse clicks later you're receiving the highest quality images possible. The Explorer is backed by a 1 year...

Miller Wide Band

If you intend to use this circuit as a mike preamp around high RF power, some RFI-proofing (limiting the RF end of the response curve with ferrite beads and RF bypass capacitors) would be well advised. Construction can be done on a perf board, keeping all leads as short as possible. The specifications and parts list are shown below, Usable frequency range AF from 50 Hz to RF over 100 MHz, with a gain of +35dB at 100 kHz, +30dB at 10 MHz, and +17dB at 100 MHz. The noise is...

On Reader Service Card

Photo C Left to right Robert Kicker N5Q8F and Ralph Fowler N4NEQ retrieve the ATV payload from the uppermost branches of the fallen tree Photo C Left to right Robert Kicker N5Q8F and Ralph Fowler N4NEQ retrieve the ATV payload from the uppermost branches of the fallen tree the GPS payload. we had to track it the old-fashioned way with directional antennas and Dopplef systems. Many of the chase team had APRS GPS systems in their vehicle, which made the job of triangulating bearings for mission...

Shortwave Receiver

Fantastic receiver 1hai captures the world with Just a 12 arris na1 Can recede any 2 MHi portion from 11 VHz. True superher has smooth varactor inning, AGCt flF gain control, pienty ol speaker volume and ojns on a 9V oatteiy. Fascinating Scout, school or club project, provides hours of fun lor even ihe most serious DXer. For the car. consider our shortwave converter Two swilchable bands (in 3-22 MHz range , each 1 MHi wide tunable on you* car radio dial. Acid some Miferest to your drive home'...

Stap

I Valid for rtew members oniy, subject to acceptance by EBC Canada must remit in U S funds dawn on U S I banks, Applicant outside the U.S. and Canada will receive special ordering instructions. Publishers' prices . A 3hjpp1h0A> arKjkng chatge and safes lox wlI be added to all orders Al books are softc ver urrf ss otherwise noted (Pi_i> ksn s' F cei, Shown) 1995 EBC tt coupon is mtssng, write to Bectron cs Book CLfc. A Divaon of The McGfaw-H Compontes, P O So* 549 r Bock tick OH d30G4-9<...

Ultimate Modification Bible Vol Iv

OVER SO MlKf WRUQ COOCS FOft CES VID HAM AADK3S OVER 40Q CB P rffU OOULfcT ON BOOG IKStflUCTCNS OvetlMUOD KMC8PU1 CVER175MOC FGRKUJPJ3C5 CV 3 OVE3 aSCANtft wcTEMPTER UDIOUCC Ntfi FHEtAlCUUTH UQ0 tflYST CH flT amp i IfiR K MAT1C S AftO JMTJCOUI it GMNtOGS OWTTS C nraa, TX 77303 AI Ci1 409-33 753 ucoec a ob o

Mfj

The MFJ-1734 is the pest glass mount dual j band 144 440 MHz antenna in ham radio New ifs perfect for your dual band mobile. A Iree BNC adapter is included for your handheld. You'll get a potent 2,6 dB of gain on 2 Meters and a thundering 63 dB on 440 MHz with lou S VR. Ii handles 50 watts of power and includes 12 feet of coax, cleaning _ pad, and all mounting hardware. A small 6 inch counterpoise mounted inside your ehicle lowers SWR and makes tuning easy. Tuning tool included. A unique...

Rit

Circuit diagram of Dave Benson's RIT Figure 1. Circuit diagram of Dave Benson's RIT Photo A H amp re ts AHGCFs v amp rsfon of Dave's transc amp tver Note the mufti-tum dial for tuning. Photo A H amp re ts AHGCFs v amp rsfon of Dave's transc amp tver Note the mufti-tum dial for tuning. Building a circuit requiring a negative supply Really want to use an audio filter but the op-amps need a separate minus supply Wellt start laying out the circuit board because Linear Technology has a new...

Printed Circuit Boards

Build professional quality PCB's at HOME, Send S5.00 for instructions to ATA Systems 30,000 Sand Canyon Rd. 53 Canyon County, CA. 91351, BNB1026 PACKET RADIO, Join TAPR, connect with the largest packet digital group in the U.S Creators of the TNC-2 standard. Benefits newsletter, software, discount on kits publications. 15 year U.S., 18 Can Mex, 25 elsewhere, Visa MC. When joining, mention 73, receive TAPR'S new book, Packet Radio What Why How 9 value FREE Internet tapr tapr,org Web http...

Jun

FOR GEL-CELLS or LEAD ACiO BATTERIES, Features Precision temperature tracking voltage relerence amp three mode charging sequence. Standard kit is for 12V 1 2 or T Amp, user selectable Can bo connected to the battery IndellnaLely, will not overcharge. Weighs 2 pounds and measures 4W 51 D it 2VtH Finished enclosure included in ktl. Assembled amp Tested 79.95 Cfi Res dents add 7 75 sates tax S amp H 55.00 insured . Foreign orders add 20 . For mora info or price tist send tegai size SASE 55c to...

Clean reliable frequencies from junk box parts

Most hams have occasional use for a relatively clean source of audio within the most important range 300 to 3.1XK Heru. It that source is variable in both frequency and level, it will he even more useful. The commercial audio generators available are far too expensive for most hams, and their extended range of frequencies is far wider than most hams could ever use. You can construct simple, fixed-frequency audio oscillators for specific but generally only approximate frequencies when the need...

Fax

Un hrrusive DX Gjhp Antennas for 60 ihru 10 Easily hidden Install Fast Fiitid or Portabie a 20 ntfertalcum with real DX Punth picniK. You cjini ii. an4 ycur iiftHi ciifacf. Bur ii worti DX bwfoct P rvfiu Vcrt DX taitbdni lilJjftj the tigfaton tkf tn A n tewms Wes f Prwj.iTW S fB01 gt 371-8425 eluded is an interface if you want to increase the voltage tuning range from zero to five volts, to zero to 20 volts by adding the two-transistor circuit, its a llavor choice item on your part Oh, I forgot...

Electronics

Sales amp Stocking Locations Nationwide C3, are insulated from ground. A grounded capacitor will prevent one oscillator I mm functioning, and no audio output will result, Use a large plastic knob on CI3. The output frequency will change slightly when your lingers are on ihe knob, and return lo normal when you lake your hand away. This is a minor drawback, but the onl gt was to eliminate it is to use a rather large enclosure, and an insulated shaft coupling on CI 3. with a grounded shaft bearing...

Repeater Controllers

Eprorrt-controtled minia__ lure, easy to build, low power CMOS, f specify call only 54 krt, 579 wt COft-G, COR amp Real Voice ID on one board Dig rat ic records up to 20 seconds of your voice Can record multiple id messages Tail and time-out timers courtesy besp solidstate relay to key lransriaer COft i COR. timers, court beep krt 549 C W1D Diode prog fa mma ble ki t SS 9 COR-4, Complete COR and CWIO all on one board. CMOS logic for low power consumption. EPROM programmed, specify call kit S99,...

B

7 elements on 440 MHz - - - 4 elements on 2 Meters . 69.95 Gel i vo Yagts for the price of j _ j one put two Yagis in ihe space sCQse of 1 Hie w j th ifngle eoa fe ed1 v ' icts 7 elements on 4- 0 MHz and 4 elements on 2 Meterv. MFJ's exclusive tina band balanced feed with FerriieChoke decoupling revenLs pattern skewing and gives you low SWR. inch diameter driver elements w ide bandwitiin. This mtional Bioeau qfStandurdx design is optimized for maximum gain, high front-to-back ratio and clean...

Circle Oh Reader Service Card

1 Ail-Mode Operation SSB.CW.AM AFSK.FM on al HF amateur bands and 6 meters JST-145 same as JST 2 lt 5 but without 6 meters and built-in antenna tuner, 2 MOSFET POWER AMPLIFIER Final PA utilizes RF MOSFETs to achieve low distortion and high durability. Hated output is 10 to 150 watts on all bands including 6 meters. 3 AUTOMATIC ANTENNA TUNER Auto tuner included as standard equipment Tuner settings are automatically stored in memory for fast GSY. 4 MULTIPLE ANTENNA SELECTION Three antenna...

An easily built project for interfacing with most transceivers

The Simple Simplex Repeater is a low-cost, easy-to-huild project that, when interfaced with a transceiver acts as a limited simplex repeater Unlike most repeaters, a simplex repeater operates on a single frequency by recording the incoming transmission and playing back this recording on the same frequency. Operators who would otherwise not he ahle to contact each other directly can use a simplex repeater operated by another party to communicate. The Simple Simplex Repeater is handy in these...

Alinco DX HFm Transceiver Surprises Everyone

Lnb Mixer Circuits

Elegant and wide functioning with many conveniences for a good price. Alinco Electronics, Inc located in Torrance. California is besi known for its single- and duat-band VHF UHF handheld and mobile transceiver equipment, sold by over 80 amateur radio dealers throughout the United States. Certain Alinco radios have achieved tan ctub status because of their unique design and relatively low cost. For instancet there are the Alinco 1200TH2 9r600 baud packet radio made popular by Buck Rogers packet...