Circle On Reader Service Card
C.L Houghton WB6IGP San Diego Microwave Group 6345 Badger Lake San Diego CA 92119 It has been a ye r since the FET ,v.tchef AC power inverter appealed in this column August 1990, in fact. The basic switch driver has been used in quite a few different applications The photomultiplier lube (PMT) covered this momh uses a modified version of ihis power supply to deliver the high voltage required for proper opera-lion The PMT is a sensitive detector used in the receiver portion ol the sys-lem Now...
Info
Photo A, The pulse charger upgraded to handle larger batteries. Photo A, The pulse charger upgraded to handle larger batteries. Mike Bryce WB8VGE 2225 Mayflower NW Masstilon OH 44646 The use of batteries in portable QRP operalion captivates Ihe attention of a loi o people in ihe August 1999 column. I discussed a small pulse charger for Geii Ceir batteries. This project produced huge piles of mail The original circuit has been changed slightly, to improve switching, and a PC board is now...
Doug Hall Electronics
Voter Department B15 E Hudson Street. Columbus. Ohio 432T1 Profr litrutUy written software l> y w r I * UTt) ' 'I lin NI AI JCllit VCS 4 I 111 ' I .nu I h.ind ic.il li iti ' 'Vi*.' * m ri. Au ti niul 111.1II11 13 tkrsi n jHOdi . '1 1J rtonfin < ) mil *rusK'M .uuily Lj avilit Uk-ai ila tes gain, F B and iippcdrtncc In si.t(iiitl> (l tSUiniJy w LTej-pri t i. I 11 Il itvtl l.l jKtJ.M plrir w tk jni n ii11 *F I H'M Ut lix' til V igi modfhm 'irr mtiis, ur. L Mdd teslftl k veritk Reti- t...
Helical Filtered Preamps For Outofband Intermod
Mode 146 covers ine erdfe 2 meier bard HF swiched aoda Gam 75dB Nolso Figure Handles 160 Watts Model 146OS has a 3dB bandpass of 1 3MH Mode* 160 covers i49-174MHz 10MHz bandpass Model 440 covers 420-4SOlYtHi * 10MHz bandpass 17dB gam 7bdB Noise Rgure * Handfes 100 Walts transmit led power All models also con in ihe CP version coax poweied 12VDC am modeteare faciory umHi per customer request. Air non-coex powered models are powered with external 13-2QVDC arvi are voltage ingutated loi st ility...
Bnb
ROSS SSSS NEW August (ONLY) SPECIALS. JDOKING FOR THAT HARD TO P1NQ ITEM - KENWOOD SM-230 38*14 TH-2GAT 265 00, TH-75A S399 00. TW- 31A 620 00 TS450S SCALL. TS-850SAT 1,609 90. TS-940 SA T 1,999.90, TS-9S SAT 3,329.90 MFJ 815B 45.90, 948 104 90, 986 5239 90. 1270B 129 90 HEATH KIT HW-2P 279.99 NYE VIKING MB-V-A 644.90, MBt-02 i79 90 ROHN 45AG1 S159 90 25G 83.90, TELEX H -GAIN CD-45II 229 90 1B6S 233.90 YAESU FT-31 t RM 369 90, FT-650 Si 349 90. FT-709R 28999 FT7J7GX 689 90. ICOM 229H 379 50,...
Am Ens As
Husttor KU , UETZ Urban WOOU0LOX TOf NA Bul me Muifli-Banfl TS4S0S AT. R-500Q. TS-850S. TW 241M 441 A, TM-2550A, TR-751A, Kenwood Service Repair, TM-731AH TS-811A, TH225A. TM-631A. TSt40St TS690S, RZ-1, TS-790A, TS95 SO, TH-77A, TH27 47A. TM 941A, TM-741A FT-767GX, FT 757GXII, FT-747GX, FT-990, FRG-8800. FT-736R, FT-1000D, FT-5200, FT-24 0, FT 470 FT.Z3R ICSI3MSAT FT41lE*ai t-911 (C02AT 32AT VAESU'FTH200*70 rrH-20 700e ic2 4GATf 4AT umden. REGENCY KINO i 'iwii Ilfi I MARINE ICOV M7 W fi M700 1...
Call Or Write For Special Quote
Whap tt comes to fast delivery honest dealing aril prompt dependa8le s e-r-v-l-c-e back-up We don idiit aavertFse il uve give it AMERICA'S MOST RELIABLE AMATEUR JIA& I0 DEALER In 1937. Stan Burghardt (W0IT , because of his intense interest in amateur radio began selling and servicing amateur radio equipment in conjunction with his radio parts business. We stand proud of this long-lasting tradition of Honest Dealingr Quality Products and Dependable * S-E-R- V-t-C- ' 7 Above all, we fully...
Cov
Bold listings are 73 s new advertisers this month, Advertisers who have contributed to Ihe National Advisory ComiiteeiNIAC). band and every mode, even a USA report which mentions Radio Fun, There's 20 pages of DX news About the only thing they don't seem to have is something along the lines of my endless editorials. Probably just as well. It's a magazine packed with interesting information, aimed at rank beginners right on through to experts, with the latest news and circuits for every special...
Alexander Batteries
Alexander Batteries is offering several new made-in-the-USA batteries for Standard HX500 portable radios. The H26204 is a 7.5V 500 mAh nickel-cadmium battery, The H26205 is also rated at 7.5 VDC, but features longer run times and a 900 mAh capacity. The H26206 is 10 VDC, with a 425 mAh capacity the H26207 is 10 VDC 700 mAh, Alexander's also receive two frequencies on the same band. The IC-2410A H comes in two versions. The IC-2410A puts out a maximum of 25 watts on both UHF and VHF maximum...
Edited By Linda Reneau Kaukm
Only a person familiar with both medicine and amateur radio can make this determination correctly ' writes Christine Haycock. M.D., WB2YBA. in a letter to fellow physicians published in New Jersey Medicine. She is referring of course, to the telegraphy waiver for handicapped hams. In December 1990 the FCC passed Docket 90* 356, exempting handicapped persons from code tests if their physical condmon prevents them from earning the code at 13 or 20 wpm. Dr. Haycock notes Totally handicapped...
Ktu
Telemetry Unit with Weathernode EPROM Remote weather observations via packet Kantronics 1202 E. 23rd St. Lawrence KS 66046 (913) 842-7745 Price Class KTU 300 Options Anemometer S110 Rain gauge 90 Photo. The Kantronics KTU T& temetry Unit. Packet radio is the most rapidly growing and diverse mode in the history of amateur radio In the early 1980s, the 'Packet Revolution was staned by dedicated groups of amateurs in both Canada and the USA These amateurs stimulated packet growth by selling...
Table Of Contents
Packe wiiftout a TNC WB2EMS sfto you how see page S' A complete software TNC for PC compatibles . WB2EMS. N8KE) Wideband coverage from 144 to 1296 MHz AQ5X Sample the outside world with this inexpensive interface. N8KDD 32 Software lor the Ham ShackT Part IV Useful ham calculations you can program yourself WA4BLC Control your rrg with your computer 60 Barter *n Buy 49 Dealer Directory 17 Feedback Jndex 54 Hams with Class 56 Hamsats 4 Never Say Die 70 New Products 84 Propagation 52 QRP 7 QRX 76...
Alinco Electronics
438 AMAPOLA AVE, LOT 130 k TORRANCE, CALIFORNIA 90501 V Phone 213-618-8616 Alinco s New DJ-F1 F4T Realized Super Compact Body and Plenty of Features including *40 Memory Channels sto e Frequency, Shift direction, Split operation Setting. Tone encoder Tone decoder setting (with optional Tone squelch unit), DSO setting, Tone frequency and Offset frequency independently. 'Digital Signal Display and Memory m Function The DJ-F1T F4T has special H memory channels for transmitting, H receiving, and...
Ojx
In our continuing effort to present the best in amateur radio features and columns, we recognize the need to go directly to the source you, the reader. Articles and columns are assigned feedback numbers, which appear on each artrcle column and are also listed here, These numbers correspond to those on the feedback card opposite this page. On the card, please check the box which honestly represents your opinion of each article or column. Do we reafly read the feedback cards You beti Tre results...
On Reader Service Card
Eurcfe, Afrta, Auft. and Eh Pacific area fcxchtsive of Hawaii aod Art S. powmum 29.95 1(33091 1991 North American CaRbook The I Sorti Aitiermn Cjilhoot lift the cafl> , n.iTTo. ii addira informs -r. iofoei 5O . Q0 Ik J radio amMnirs in ill timm et' Konh Amm. from Pjaana to CiuikH including Grttrd-UKL BctthlkLi. and the Caribbean iilmdi plus Hawjin und U.S. poAw ions. 0SB24 Radio Handbook, 23rd Ed. by Wittum,r , Orr WdSA mpitges a ' everything v u wmUh to kntm ab...
Reader Service
Just fill out the Reader Service card and send it in. You'll receive free product information from our advertisers, and one lucky reader will win a great prize from ICOM. The dual bander of the future is here ICOM s IC-24AT mini-handheld gives you full operation on the 2-meter and 440 MHz bands, while offering outstanding flexibility and performance,
Tentec Paragon
-Sand Registers itore the fast u ed frequentv mcde jrj wr.pt aU oandi Through 10 meters 10 Minute Timer rerrurufs you to iD your station. -Single Key Band Selection mgites QS gt fast -Main Tuning Knob KHj Per Revolution is easily sei 1, 1.3, 1 7 2-5. o 5 kHz to suit your operating stylo Dual VFO OtKF t and S mulianeous R and Ti of 1 sat - -Up and Down keys jt selectable between mH and IQOkHr or TO kHz and 5kHz. -Memory Channel number is preserved for later access -Easily Insiail'f in 10 minute...
Kenwood U S A Corporation
COMMUNICATIONS L TEST EQUIPMENT GROUP PO BOX 22745,2201 E Dominguez Street Long Beach. CA 90801-5745 KENWOOD ELECTRONICS CANADA INC PO. BOX 1075, 959 Gana Court Mississauga, Ontario. Canada L4T 4C2 Here are your new mobile companions - at your service whenever you're on the road Their compact size makes installation a snap, and the remote control options allow you to customize your installation for that professional look Wide band receiver coverage The TM-241A receives from 118-173.995 MHz....
MFJ
Super Value Several Instruments in One You get a super value because several instruments are combined into a single portable handheld unit. It has a low distortion RF generator that covers 10-160 meters, an SWR bridge that gives forward and reflected components and a computing circuit that automatically computes the SWR and displays it on the meter. Everything is automatic. All you do is set the frequency and read SWR, It also has a frequency counter output so you can connect a frequency...
Aluminum Cabinet
8 RED LED DIGITS - 3 GATE TIMES FROM THE ORIGINATOR OF THE HAND HELD FiHDW COUNTERS IN THE StarCab STYLE CABINETS, m Kt M WITH EXPERIENCE PRODUCING OVER TWO DOZEN SUCCESSFUL FREQUENCY COUNTER MODELS SINCE 1975, FRED HUFFT- W4PLM HAS DESIGNED THE 3500 WITH ' y CfjW UNPRECEDENTED FREQUENCY RANGE, MfffiilpWilMM FEATURES AND QUALITY IN A VERY f -MKiitil IW AFFORDABLE 'POCKET SIZED COUNTER. ' S COMPUTER DESIGN AND STATE OF THE ART I - ' COMPONENTS PROVIDE UNCOMPROMISED RELIABILITY AND PERFORMANCE....
Radio Shack
Radio Shack is now offering the Micronta Ham Radio SWR Power Meter cat. no. 19-320 . This compact meter is ideal for optimizing antenna settings for hand-held transceivers as well as mobile or fixed ham radios, It is specifically designed for use on two popular amateur radio bands 2m 144 MHz and 70cm 440 MHz . The SWR Power Meter's main features include low insertion loss, enabling it to remain connected at all times wide-range accuracy that lets the user measure power up to 60 watts and a...
T
Schematic diagram of the interface. Figure 2. Unusual audio waveform as sampled by the interface. Figure 2. Unusual audio waveform as sampled by the interface. than the A-D converter chip can handle, so external drivers are necessary. i chose common NPN transistors. En addition to the data bit lines 0-7, two more lines from the printer connector are required. These control the A-D convener. They are found at address 37A LPTI , 27A LPT2 or 3BE on some computers. Pin I controls when the...
Spain
Woodson Gannaway N5K VB EA8 Apartado 11 35450 Santa Maria ae Gut a Las Palmas de G. C.J Islas Cananas, Espa a Hi to Arme and All. Paco EA7CZR sends some QSL cards from the Carnaval de Cadiz, and an announcemeni he would iike presented to Our readers 1 am Francisco Ramos EA7CZR and EA7 R. from the city of Cadiz, southern Spain Paco is short for Fran ctsco Eds. I am enclosrng some QSL cards from ED7TDP, a special call used dunng the Mardi Gras in Cadiz. The meaning of TDP is Tacita De Plata...
Microwave Transverters
SHF 1340 Complete Transferrer SHF S Y STEMS No rune linear transverters ano transverter Lits lor 903 1269 Z3W 2400. 56MHz AIuse2m gl3SV Kits nrjuoe minar ano L O PC xahk xli ano afl oomponfi-1s Bu Lfiitl iikJuO IFJDC sttrtcnttiand, connectors and compact low pro1iie kmj Oirwr frequency options m amsteuf ba d av amp iJafcHe SHF 1240K 1 96- 30Q MHi lDmW Kil S149 Built S355 SHF1 69K i26fl-l27 Qs ArMHjeL IQmW Kil 140 6uifr J55 SHF23 4K 2304-2300 MHz lOnW Ki 205 Buill 325 SHF 2401K 2400 MHz Hod 5...
Giehl Electronics
Giehl Electronics is offering two software enhancement kits, one for the Kenwood TS-940 and one for the Ten-Tec Paragon. The TS-940 kit features tunable memories that allow you to change the frequency of a memory channel using the main tuning knobT memory bank seJection using the UP and DOWN keys, and easiiy-sei kHz per revolution. The Paragon kit offers band registers that store the last-used frequency. mode, and fitter for all bands 160 through 10 meters a 10-minute timer that reminds you to...
Amateur Electronic Supply
Good Hope Road Milwaukee, Wl 53223 Phone 414 358-0333 WICKLIFFE, Ohio 44092 ORLANDO, Fla. 32803 CLEARWATER, Fia. 34 25 LAS VEGAS, Nev, amp 9106 RICKSON COMMUNICATIONS 28940 Euclid Avenue 621 Commonwealth Ave. 1898 Drew Street 1072 N. Ranclio Drive 5456 N. Milwaukee Avenue Phone 216 595-7388 Phone 407 894-3238 Phone 813 461-42B7 Phone 702 647-3114 Phone 312 631-5181 Toll Free IC-1275A IQw I,2GHz FM SSB CW i849 00 1599 Associate Store CHICAGO, minois 60630 IC-W2A 2m 44i HI 629.00 529 IC...
He
Photo B Sammy Garret AA0CP. the INesfflnk Young Ham of the Year, encouraging adults to share their enthusasm lt ih youngsters Carole Perry WB2MGP Media Mentors. Inc P.O. Box 131646 Staten island NY 10313-0006 For several months prior to the 1991 Dayton Hamvention, I was concerned about finding dynamic youngsters who were also active hams lo speak al the Youth Forum was going to be moderating there, I was also anxious about how many hams would be bringing their own youngsters with them to the...
Quorum Communications
Marc h Leavey M,D.r WA3AJR 6 Jenny Lane Baltimore MD 21208 Packei, packet, packet who's got the packet As one of the newer forms of digital communication, packet circuits have certainly taken amateur circles by storm. Look around this magazine if you doubt this fact. Nevertheless, packet just might not be for everyone. To wit, consider this letter from Howard Evans W6IDS. Howard writes, I run a landline bulletin board named 'Amateur Radio CBCSr in Rancho Cordova, California , . What interests...
International
Amie Johnson NiBAC 103 Old Homestead Hwy N Swanzey NH 03431 Fteld Day has come and gone. and I dtdn 7 make it to Colorado tike t dfd last year t did get an invitation, out f had to refuse because my schedule just wouldn i permit it though f aid make it fo the Htgh Country m July. My big ham project for the summer was to make my one 'egged 160m dipoie lt nto an honest two-fegged 160m inverted vee A very tait tree between my house and the property next door became available for the center sup...
Quement Electronics
We Carry A Full Line Of Popular And Hard To Find ICOM Products SAN JOSE CA 95128 Call Us At 408 998-5900 IC 901A Mobile Transceiver S929 UX 39A 220 Mhz band unit S309 UX-49A 440 Mh2 band unit 328 UX-29H Hi Power 2m band unit 320 IC970H All mode 2m 70cm base 2699 UX-R96 Receiver unit 389 JC-3220A Compact 2m 70cm mobile unit 579 Since 1933t we have been providing expertise and quality products to generations of hams. C-229A , . ,S396 Compact 2M Mobile Henry Allen WB6TYD 214 330 4724 am-4 pm...
