Info

DL2MDL DB20S, and DKIYQ performing digital link testing on RUDAK using four user stations. Photo H DL2MDL, DG2CV, DKI YQ, and DB20S discuss final changes necessary in the processor circuit. Similar to a I NC board for packet radio, it wiJl be programmed to provide a TNC in the sky. Two links one uplink fron the ground to RUDAK and one downlink from RUDAK to the ground- -provide the communications channel through an intelligent hardware interface. RUDAK is a German acronym for...

Radio Amateur

925 Sherwood Dr,, Box 24 7 Lake Bluff, I L 60044, USA same a* the FM voice repealers wc are used to. In fact, any packet station can be a digipeater. Remember thai each packet station listens to every transmission on the frequency to see if that transmission is addressed lo it. it also looks at each transmission to see if it is supposed to be repeated. The addressing information specifies which stations are lo repeat the information and in what order they are to repeat it. Thus a cham of...

Ever Say

Tures of the exhibits for use in your next year's brochure Remember to send a letter to the exhibitors after the show, getting their input and possibly some good quotes for your next year's sales pilch. You'll also get some ideas on ways to improve. The locai hams already know about your local attractions, so you don't have to lay that on 'em, but those from further out may know less about it than you think You might get them to come in Thursday night and spend Friday with their families having...

Custom Knobs

Custom-printed Knobs and dials are available from Selco Products. Virtually any logo, numeral symbol, or line can be printed with a character height of as little as 1mm. A wide variety of shapes can be printed on, and it is possible to print lines around a corner. Knobs and dials come in black, gray, white, and clear, and can be overprinted in a variety of colors. For more details and samples, contact Selco Products Co 7580 Stage Road+ Buena Park CA 90621. Reader Service number 153,

Build The

A complete kit of parts, including a high-quality double-sided printed circuit board, is available from Valtey Electronics. The kit version is slightly different from the unit presented in this article a larger EPROM is used which covers two frequency pairs, and several cosmetic changes have been made to fhe PCB Order Number Description Price 88601 Digital Tuning Indicator kit 79.95 88602 Kit without enclosure 72.95 88603 Semi-kit PCB and EPROMS only 22.95 All prices include shipping and...

Type Orbits

Can vou tell that this was sen as TYPE OR BITS 134 No, and neither can the BBS system, which proceeds to send you 15 minutes of last week's orbital elements. The packet system 20 kHz up the band took three tries to get the line through, but now it's reading this week's elements. Score one for packei. W e're off the pairi again. The question was 14 ts HF packet really usable It comes down to two things hardware and user training. The RTTY community has spent many years perfecting terminal units...

Electronics

Elh 730 Manual Espa

ARCADIA CA 91006 (818) 447-4565 TOM W6QRG MARYANN WB6YSS_____Compuserve 72405,1207 10 pin VMS color camera and RCA phono jack video inputs, Crystal locked 4,5 mHz sound subcarrler. PTL (Push To Look) T R switching, Sensitive UHF GaAsfet tuneable downconverter. Two frequency 1 watt pep xmtr, 1 crystal included. Xmit video monitor outputs to camera and phono jack. Small 7 x 7 x 2.5' for portable, mobile, or base. Draws only 500 ma fexc. camera) ar 13.0 vdc....

Berryville Va

The Shenandoah Valley ARC will sponsor its 36th annual Winchester Hamfest on August 3, from 7 a.m. to 3 p.m., at the Clarke County Ruritan Fairgrounds on Route 7, two miles west of Berryvifle, Virginia, Admission is 4, women and children under 12 are free. Tailgaters and limited tables 5. Talk-in on 146.22 .S2 and 146,52 Simplex. For further information, call Rob Kinsley NT4S at (703J-869-5113. or write SVARC at PO Box 139, Winchester VA 22601 Exams on August 2 at 9 a m call Wart Quitter NC4B...

Wa

direct SWR reading MP-1 (HF) 1.8-30 MHz D1010 10W in 100W out (1W-25W, 2W-50W) Available at local dealers throughout the world. 16890 Church St, Morgan Hill, CA 95037, (408) 779-7363 Late last year AEA broke new ground by introducing the first five mode amateur radio computer interface with Morse, Baudot, ASCII, AMTOR, and Packet. the PK-64. Now AEA has another breakthrough .the PK-232. The PK-232 makes any RS-232 compatible computer or terminal the complete Amateur digital operating position....

International Radio

747 SW South MacodoBlvd. ortSi, Lucie FL 33452 3 Amateur Radio August, 1986 93 Clark WB9EAP, 2202 South Boots Street. Marion iN 46953. The St. Cloud ARC will hold a hamfest August 10 at Lake George in St, Cloud, Minnesota, near downtown, off MN 23 and U.S. 52. S3 ticket donation. Talkin on .34 ,94 primary, .615 .015 secondary. For more information, contact SCARC, Box 141, St. Cloud MN 56302. The Mid-Atlantic ARC will hold its annual hamfest on August 10, a a.m. to 3 p.m., at the Bucks County...

New Mercer

Mercer Electronics, a division of Simpson, has introduced the modei 9370 autoranging digital multimeter, The 9370 measures up to 1,000 V dc in 5 ranges, up to 750 V ac in 4 ranges, up to 10 Amps in 2 ranges, and up to 2 megohms, A memory mode stores a zero offset of 99 counts. Also included -s an audible continuity tester. The model 9730 retails for 59, For more information on Ihe entire line of Mercer test equipment, contact Mercer Electronics. 859 Dundee AveElgin IL 60120 (3i2 -697 2265,...

Austria

Osterreichischer Versuchssenderver and Theresiengasso 11 A-1180 Vienna Austria The OA .S.V. (an IARU member) announces its Austrian prefix contest (AOEC 160m), which will lake place the third weekend in every November, 1800 UTC Saturday to 0700 UTC Sunday, on 1810-1950 kHz. (Participants must be careful to observe their national reguiations for 160m ) CW only, licensed radio amateurs worldwide fin Austria, OVSV-mernbers only) and SWLs are eligible. Contest call CQ TEST CQ OE exchange RST and...

Ham Trader Yellow

Buy, swap, sell ham-radio gear Published twice a month, Ads quickly circulate no long wait for results. SASE for sample copy. 10 for one year 24 issues . PO Box 2057, Glen Ellyn IL 60136-2057. BNB412 QSL CARDS Look good with top quality printing. Choose standard designs or fully customized cards. Better cards mean more returns to you. Free brochure, samples-Stamps appreciated Chester f you want a 2-meter tion. The I02A is aiso avail- handheld with exceptional able and...

L

Harold Price NK6K Tak Okamoto M2PKI Hanspeter Kuhten DKIYQ Peter Guelzow DB2DS Donald AW DJSHC KE6MN Satellites are going digital in a big way five international experts combine to define our place in space. Microprocessors and digital communications have played a gt an in ili o the recenl amateur spacecraft They have usually been Photo A. Dr. Martin Sweeting G3YJO, UoSAT Project Director, listens to the Uo-9 spacecraft with a hand-held 2-meter FM radio. The antenna array in the background is...

Controller Wd1770 Boost

The Original Ampro Lrttle Board at a Glance 7 3 4 x 5-3 4 x 3 4 One e-bit 2732 EPROM for initialization Two RS-232 serial pons, one 75-9600 baud, one 75-38,400 baud, plus one Centronics parallel printer port. One serial port is used to communicate with any Western Digital WD-1770 disk-controller chfp can drive one to four 5-1 4 soft-sector disk drives, in any combination of 46 tracks per inch tpi and 96 tpi, single- or double-sided 5Vdc 750 mA, 12 Vdc 50 mA Ttie - J 2 V dc tor the RS-232 serial...

Lb

Dept. 011-402 Benton Harbor Ml 49022 Kail amp Associates 2440 E. Tudor Road Suite 138 Kan i ronics 1202 E. 23rd Street Lawrence K amp 66046 16713 Mooney Drive Gaithersburg MD 20879 Micro Supply Organization 4909 Stockdale Hwy 180 Baterafieto CA 93309 QSKY Pub shing PO Bo if 3042 Springfield fL 62708 Watt Engineering PO Box 1848 GoletaCA 93116 PK-64 Pakratl TNC for the C-64 128 219.95 HFM-64 Optional HF modem for the PK-64 119,95 PK-64 HFM-64 Package deal 309.95 PK-80 General-purpose TNG-2...

Western Electronics

BOX 982 MARYSVtUE, WA 90270 ALSO DIPOLE5 A Lr MTEiKSPACE ANTENNAS or W tHH pnttntpt n iTXl-o- f c 9f m_lt gt b nd BIG rtpvli 1 ImIwIk bandit ithme km SWH'Coii Ho pfivtt Compact - FJJU A amp S amp L R ta iur ipti-lrafl Cfif fitr. ip i. 1 E , I g 1F.1TF TftTf 10 w mqulb camfhh iniimce fli- tdu' mrswul cahi kchm band sloped - ooiq 30 a J lAQ SO 7 - A0-I0 W -THAV UH'OIE - 160 00. 40M - J - 00, a HAND SPAC E SftVt FI DLP L t6Q 1 hm IQ M ______ -lullOS wirln .irH- IHN...

Mfj

A deluxe MFj Keyer in a compacfTbnfiguration that fits right on the Bencher iambic paddle MFJ Keyer - snail in size big In features Cu 's 8044-B IC. adjustable weight and tone,front panel volume and speed conrrofs fe-50 WPM , Buill-in dot-dash memories Speaker, sirfeione. and push button selection of seml-automatic tune or automatic mode i Solid state keying Bencher paddle is fully adjustable heavy steel base with non-skid leet Uses 9 V battery or 110 VAC with optional adapter MFJ-1305, 9,95....