MODEL

*Holds ell Hamstick Antennas and rnijr y others. Gvor-10C'tf of Molding power 2 KU tool print 3620-9A Whitehall Ftd., Anderson, St 29626 - 864-226-6990 FAX 864-225-4565 i E-ltfaii hamstick hamstick.com www.hamstich.com 3 S X 24 hh re jLJ mounting iS'R Se c x w PL-259 no rust Aluminum construction ALL 100 MADE IN USA Add 7 per order S H *Holds ell Hamstick Antennas and rnijr y others. Gvor-10C'tf of Molding power 2 KU tool print 3 S X 24 hh re jLJ mounting iS'R Se c x w PL-259 no rust Aluminum...

Every Issue Of

The entire run of 73 from October 1960 through last year is now available. Over 800 fiche You can have access to the treasures of 73 without several hundred pounds of bulky back issues. Our 24x fiche have 98 pages each and will lit in a card file on your desk. We offer a battery operated hand held viewer for 150, and a desk mode for 260, Libraries have these readers. The collection of microfiche, is available as an entire set, (no partial sets) for 325, plus 10 shipping (USA). Annual updates...

Mfjmv

MFJ's heavy duty c o n v e nt i ona 1 po wer s u p pi y is excellent for powering your HF or 2 Meter 440 MHz transceiver and accessories. A massive 19,2 pound transformer makes this power supply super heavy duty it delivers 35 amps maximum and 30 amps continuous without even flexing its muscles. Plugs into any 110 VAC wall outlet. It s highly regulated with load regulation better than . Ripple voltage is less than 30 mV, No RF hash - it's super clean Fully protected has over voltage protection,...

Outernet

There's a Kantronics 9612 'tus about to enter 1er Wee aboard Mir Packet, GPS APRS, Host, KISS and WEFAX modes Personal Mailbox (PBBS) row supports multiple calls Copies NWS EMWIN with optional software Remote access, sensing and control with two A D and two KA-Noae or option K-Net networking capability PBBS 100k, expandable with optional 512k RAM Uses external power or internal 9v battery NEWU5ER mode and online help 3,2 Firmware now with Advanced GPS APRS Ul digipea ting available for alt 3...

Info

CHARGE ORDERS to Visa, Mastercard American Express or Discover * _ _U '- J j1 1 lii o uj - 1 > z. vn - -- --I - _j- - ui_- ___11_ TERMS. NO MINIMUM ORDER Shipping and handling for Itie 43 ccniinynl'-il U.S.A Gtt dgi ordci. A oihers indutiuK AK. HI, PR t)i Canada must pay full shipfijng. AJI orders delivered 1 1 CALIFORMEA must ir dude iocai state tan Ouiiniiries LinileO NO COD. Prsg& B suLijecl QALL. WRITE ifl di gf wUhout ngthce. Outside the U.S.A. send 53.00 postage. ALL ELECTRONICS...

Ggte

- - - F ri r n mr. et immwrn - 82 78 Hamsum 4 42 tsotron 65 242 Jan Crystals 13 T 275 * Maggiore Electronics 33 335 Menu Plus 5 86 MFJ Enterprises 7 Michigan Radio 39 193 Morse Tutor Gold 82 240 Molron Electronjcs 59 246 Matron Electronics 73 114 Mr. Ned 27 ' P st BPQS> irii 33 68 Radio Book Shop 57 Radio Book Shop t 59 Radio Book Shop 75 Radio Book Shop 86 254 Ross Distributing 18 167 Sescom, Inc ____ 49 188 SGC. Inc 81 141 The Nicad Lady 69 269 Tige rtron ics 51 259 Versatel Communications...

Kenwood

Radios for Business, Governments, Consulates, Embassies. Stocked and Serviced. Overseas and Domestic Orders. YAESU HAM amp VEHTEX BUSINESS RADIOS' FT51-R, FT-asoo. TOO, FT-11, FT-25Q0, FT30 0, FRG-100B. FT- GOOD. FT-5 R, VXin, FT'940. FTSMAT, FT- J20, VXR-50 G repeater 25 walls, VHr ar UHF. Manne Mobile VXM-100 HAM, MARINE. BUSINESS AMD AVIATION RADIOS A-2 amp C-T7, C-70 amp . IC- 07, C-T A IC-75C IC- GXAT, C-Wj A, IC-2Q7H NEW rao.7 F.hC-LI VlOO

Joys Loud Enough Metronome Part

Evert Fruitman W7RXV 2808 West Rancho Drive Phoenix AZ 85017-2646 fruitman asuchrn.la asu eduj Last time, you II recall, we went through the story of why I decided to huild a metronome that my daughter could hear over the souud of the piano one that could he set for any heal. Pari I included the schematics and parts lists now let's put it together Note Figs. 1-5, Tables 1-3. and Photo A were all included in Part 1, published in April's 73. Fi . 3 remember it from last time lends itself to just...

MAY

FAIR OAKS, CA The North Hills Radio Club of Sacramento will hold its annual Swapmeet 6 a.m.-12 p.m. Sunday, May 31st, at the Bella Vista High School, 8301 Madison Ave. in Fair Oaks. From I-80, take Madison Ave, east for 5.8 mi, to HS. From Hwy 50 take Hazel Ave. north 1.5 mi. to Madison Ave., turn left and go west 1 mi. to H.S, Seller spaces S10 two parking spaces , buyers enter free. New. used and surplus amateur radio gear, electronic test equip., and amateur related computer gear. Contact...

Izv

Finders provide 2 degree accuracy, and include 1L software for Iriangulalion from ff a centrat control site. Mobile versions also available covering 50MHz to 1 GHz PO Box 2780 Carefree, AZ 85377 Tel 602 48S-9755 Fax 602 488-1295 European Market Direc tor Denis Egan TO Box 2. Seaton Devon EX 12 2YS nglafid Tel amp Fax 44 1297 62 56 90 Joe Moell P.E. KOOV R O. Box 2508 Fullerton CA 92837 Hom ngin aol.com http members aot.corn homingin Has our club held its first hidden transmitter hunt of this...

S

Fig, L A step attenuator is a coarse gain control. Fig, L A step attenuator is a coarse gain control. A preamp can be built with discrete transistors or with hybrid amplifier modules such as the Motorola MWA110. W hile a preamp using a 2N5460 JFKT can have a spot noise figure as km as I dB up to 400 MHz, obtaining a broadband match without introducing excessive losses is a challenge, There is much to recommend the MWAI10 hv- brid amplifier wide bandwidth, respectable noise figure, and 50 il...

Rg

1 2H x 2 wood, 10-ft. length crossarm 4 Hose clamp to secure PVC pipe to crossarm 2 5 16' x 1 machine bolts with nuts 1 Light-duty TV rotator RS 15-1225 50 ft. Rotator cable, 3-conductor RS 15-1149 1-1 4 EMT conduit for mast, length dependent upon height 12 AWG THHN antenna wire approx. 30 ft. required for 20 m antenna Total length of antenna 12 AWG rabbit ear extensions. L 468 freq in MHz. Just above the rotator, the horizontal support is mounted to the one-inch vertical EMT conduit The...

Penny Pinchers Digital Ammeter

Because 1 do a lot of mobile ham operating, bauery usage is very important to me. During the past few years, when cruising on my boat I have often found my battery voltage becoming lower than ii should be. As a consequence, 1 have been told hy the Waterway Radio and Cruising Club net controller that I was FMing, check your batteries. The Waterway Radio and Cruising Cluh meets daily at 0745 Eastern time For about an hour and is dedicated to helping and passing traffic for marine mobile amateurs...

Modulating Signal

Ax576 Modem

R sultant bandwidth reduction with the use of a Gaussian filter The frequency at which the low-pass Gaussian filter Marts to work has a direct influence on the bandwidth used for transmission. The lower the frequency relative lo the data rate of the signal, ilie narrower the transmission spectrum, but the higher the likelihood of bit errors during transmission. The ratio of the -3 dB point of the low-pass filler Fl to the data rale is known as the BT value. This can be shown by The...

X

Piezot MuRata PKM-11 or Radio Shack 273 73 or equivalent in the house. This sound is equivalent to a smoke detector, so you shouldn't I have not been alerted h my new alarm yet. but it gives me a vace of nund thai 1 never had before. Knowing that it's there makes all the difference

Wwv Receiver

Wwv Receiver

Got lime ft frequency checks without tjuj lng multibano hf rcvr Hear solar activity reports affecting -adio propagaiicr Very sensitive and selective crystal contro ed super-het. dedicated to listening to WWV on 10 MHz. Performance rivals ihe most expensive receivers RWWV Rcvr Kit, PCB - RWWV Rcvr kit wi h rabt sp r. ft 12Vdc adapter . 69 RWWV Rcvr .v t in catil M sp r a asaptei ________ S129 Hamtronics rs pieased to announce a new line of its vhf fm transmitters and receiversr popular for...

Years Of Quality Antennas Skymaster Hf Kits From Js Pretuned Hf Quads From Sa

Quad Antennas From 2 Through 4Q Meiers 2 METER 4 EL PRE-TUNED S4 amp .9S SiH 6 METER 2 EL PRE-TUNED S69.95 54H SEST PfltCE amp O eeyBLEBHAIQtB DftCfW.N ftOPE visit our new web site http www,cubex,com Write Or Cal For Fret Cslit og 7024 Soutfwesl 21st Place. Unit D. Oavie, FL 33317 954 236-3663 FAX 95- 236-5576

Qrp

Michael Bryce WB3VGE SunLight Energy Systems 955 Manchester Avenue SW North Lawrence OH 44666 prosolar sssnet.com As the sun wan us the planet this time of year spring arrives and again the earth is renewed. It's also the time of year that marks the beeitiniiis of hamfest season And of course the biggie that starts ihe season off is Dayton's hamvenlion With luck. Ihis year will mark my 24th trip to Dayton. And if my timing scoffed, the column should hit just as the hamvenlion kicks off, Dayton...

Als

While allowing ii to complete the circuit for DC. An example of a balanced amplifier is shown in lip. 11. Tliis circuit is a variant on the theme of the Fig. 8 circuit in which the input transformer TI in Fig. 8 is replaced by the loop, Because the circuit is a common gate push-pull amplifier, ihe coupling loop must be center-tapped in order to provide balanced bui out ol phase input signals to QI Q2. As with the previous version, the DC is applied to the drain terminals of Q1 and Q2 through...

June

PA The 44th Breezeshooters' Hamfest will be held Sunday. June 7th. 8 a,m gt -4 p.m, on the Butler Farm Showgrounds, just north of Butler. Handicapped accessible. Admission 5 per person, under 12 admitted free. Take PA Rt. 68 East from Interstate 79. or take US Rt. 68 West from PA Rt, 8. Talk-in on 147.96 .36. Vending tables S15 per table, rented in advance, first come, first served. Reservation deadline is May 15th, Send payment with an SASE to George Artnak N3FXW. 3350 Appef Rd...

In

Mwa110 Circuit

Fig, Two MWAIIOs produce a broadband preamp, 22 73 Amateur Radio Today May 1998 Fig, Two MWAIIOs produce a broadband preamp, 22 73 Amateur Radio Today May 1998 and Vt is 2.9 V. When V is 12 V. the decoupling resistance R in Figs. 2 and 3 must drop 9.1 volts. Therefore. R must be 910 fl The amplifier shown in Fi n 3 uses 50 Q. micros trip lines at the input and output of the MWA110. The DC components are on the ground plane side of the hoard, while the RF components arc on the other side. The DC...

Ya Gotta Shop Around

Take your time, do your homework, and get the best deal Have you ever looked at a new rig. or even a picture of a new rig. so long and hard thai you almost drooled on it That's die wa I saw the COM IC-706. What a great idea tor a rig a complete design the everything transceiver. I had been using my trusty Kenwood TS-130S, which I loved, for many years. It was evervthiim I had needed . -t however I used Lhe 130 as my secondary rig at home and white camping, and sometimes ran it mobile- and it...

Brits Get Gaussian

with GMSK Data Products' high-speed packet modem Roger J. Cooke G3LDI The Old Nursery, The Drift. Swardeston, Norwich Norfolk NR14 BLQh UK m ay or uk.mdis.com GMSK Data Products is a partnership company set up by two professional electronic design engineers who arc also keen radio amateurs Matt G6WPJ and John GKSTW. They are the sysops of the TCP IP packet stations GR7WPJ and GB7STW, respectively. Mutt and John are also av id members of their local TCP IP group, the Essex IP Group or EIPG,...

Gmsk

A method of data modulation known as Gaussian Minimum Shift Keying GMSK is used lo pass data as fast as practicable in the radio channel. GMSK modulation and demodulation and the modems' control and data coding can all he performed by the latest integrated circuit devices. This makes for a compact design and lav out vvhich is easv to build and provides for high performance. Radio port speeds of 4StK . 9600. 19200, and 38400 bps with AX384 7200, 14400,28800, and 57600 bps with AX576. The...

Pill Bottle

Making Center Insulator

Fig, 3. indoor wire dipolt using a discarded pill bonle as the center insulator. Fig, 3. indoor wire dipolt using a discarded pill bonle as the center insulator. Alter struggling to remove the iin GMA-style fuse mounted on the printed circuit board of my Kenwood TS-50 after it opened, I decided to make my life a little bit easier the next lime that fuse might give out I cinched a small in Ion cable tie around the new fuse's bod gt . leaving enough 'tail' on the cable tie for me to easih crab...