Usa Only

Fig* 1, The communications core of PCSat is a pair of Kan ironies KPC-96J2+ TN s. Top Standard user communications. UHF-1 is 435.250. Bottom Command and downlink paging. a lockup condition in these commercial off-the-shelf TNCs, PCSat uses three methods of hardware resets back to launch defaults* First, each TNC has a failsafe RESET circuit that monitors the PTT of each TNC as long as a transition occurs at least once a minute, then the TNC is assumed to be operating correctly and the INC...

Kaq

Digital Ground Hardware Brian Stamp N5YC Computers & Related Sensors Lyle Johnson KK7P. Navigation Sensors Lou Me Fad in W5DID. Propulsion (launch-dependent) bmas Svitek, Command Team r,eader Staces Mills W4SM+ Launch Availability Robin Haighton VK3FRH, Jan King W3GEY, and To mas Svi teL Morse Tutor Ck> ld from GLG.TJL is the answer for beginners and experts alike. * Get the software the ARRL selh and uses to create practice and lest tapes and Morse Tutor iiold is approved for VE exams at...

Fln

H E AOSFT ho 1SE RE 0 UCt m* 4W33G-01 BV DC WR CABLfi SXlSSS 4(M SJN 1 l i named Zarycr using Russian antennas used to dock the FGB. These antennas, designed for use near the 2-meter band (see Photo A), are no longer used by the Russians and can be used by the ISS ham team permanently. This is the current location of the ISS ham radio station. In late 2001, a set of 4 antenna systems developed by the ISS ham team are expccted to be deployed. Once these antennas are deployed and checked out, the...

Welcome Newcomers

You are about to embark on a journey into the fascinating high-tech world of satellite communications. It won 7 cost thousands of dollars, and you don 't even need a satellite TV dish, Just bring an open mind and an active curiosity Tiie Space Age began on October 4, 1957* when Sputnik achieved orbit and became the world's first artificial ellite. Though international tensions rose, so did ilk* excitement as scientists and engineers speculated on the potential of the man-inade orbiting de ice,...

Info

Masterc American Express or Discover TERMS NO MiNIIMJU Qf DEP S ng randbng I the 10 camwtftntai USA amp 600 os order AJI ocrm rdudmg AK HI PR of CamxOa fTiLAt pay M At- O amp vJttd n CALIFOFEM A nusi irtTude stais ss -- ta Qwaimifc __ Lirated WO COO P ces CALL WRITE 1 a ge va not FAX or E-MAIL ALL ELECTRONICS CORPORATION P.O. Box 567 Van Nuys, CA 91408 FAX 818 781-2653 alicorp aflcorp.com identifying, converting, and tuning them on the internet. AO-4 carries transponders...

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 tne treasures of 73 without several hundred pounds of bulky jack issues. Our 24x fiche have 98 pages each and will fit in a card file on your desk. We offer a battery operated hand held viewer for 150, and a desk model for 260. Libraries have these readers. The collection of microfiche, is availableas an entire set, no partial sets for S325, plus 10 shipping USA . Annua updates...

Risky Business

Wood Structural Design Data

That s one way to describe designing our next radio amateur satellite. IV iat do you want the next amateur radio satellite to do Ask that question of 100 hams who are interested in amateur radio satellites and you will probably get 100 different answers some from folks who are very vocal and strongly animated about their opinions. Also, ask these same folks how to build this satellite and you will also get 100 different opinions. Such is amateur radio satellite-building, such is AMSAT. This...

USA

Sarex Shuttle

Channel usage and mission Objectives. Table 2. Channel usage and mission Objectives. pass or not Actually, although 90 of ihe USA ham population is within range of this terrestrial infrastructure 70 of the iand mass is not, so travelers are often out of range of the terrestrial links. Due to the shared use of 144.39 with the thousands of existing users, this downlink on 144.39 will ONLY be used for die special applications consistent with the national significance of this channel. Such...

Bilal Compasty

Florissant, CO 80816 K 1.38 lCT-W Hz K, Bollzmann's constant T is the noise temperature in kelvins which lor this article we took to be 12QK on 2.4 GHz. B is the receiver bandwidth assume 2.7 kHz tor a typical SSB receiver. Plug in the three numbers, and the received noise powder is Pn 4.5 x 10 LS walls. So. the signal-to-noise ratio. SNR Pr Pn. Dividing the signal and noise powers just calculated, you get, for A-0-13's beacon at 40,000 km on a 60cm dish in an SSB bandwidth,...

Wanted

Fun, easy to build projects for publication in 73. Joyce Sawtelle, 73 Amateur Radio Today. 70 Hancock Road Peterborough NH 03458. such as die IG-271 47I are typically used along with beam antennas controllable in both azimuth and elevation. Antennas lor these satellites range from simple omnidirectional antennas like egg beaters to ihe big OSCAR-class setups. Now that you have an understanding and lots of references for further information of what satellites might be easy to work and how to...

M

Iqgrt -t iti Turn ' - afcJ r-t rriwctflTumJ I t . L- gt her Latfh iTVrz t gt l amp htt AtiMil L-r jti filiCTijifiti i nnaa Leisfit. -orGj f lt ,L -r --LI PF ItnhrP I 1 'I--- I '- - f lt ,L -r --LI PF ItnhrP I 1 'I--- I '- - Fig J. Dimensions for a 2400 MHz helical. Fig J. Dimensions for a 2400 MHz helical. design, especially as it performs so well and costs so little. Thanks for the time taken to publish the design. Howard further details of the design and testing, and a link to James Miller s...

Qrx

The city remains completely shut down. No access to any bridges, tunnets or subways, f-16 aircraft are flying very noticeably in New York airspace patrolling We are literally under military and federal control and the governor has mobilized the National Guard Those were the words of one New York area ham familiar with emergency communications. He was descnbing by E-mail the situation late in the morning of Tuesday September 11th after what are believed to be terronst-launched attacks against...

Qrh

As part of the worldwide amateur radio community, Australian amateurs have many friends and relatives in the U.S., and many of us are wondering how these friends are faring I note with pride, however that in this as in many other such situations amateurs have already offered their services through the AFRLand its various emergency service organizations to provide assistance to both individuals and the wider community affected by this disaster. This sptnl is especially significant in this the...

1

Straight 42mm i ci couple 56mm long 22 nm o d. copper pip to WG16 transition i _ Fig. 4 Actual dual-mode ham assembly dimensions using a 60cm Amstrad offset-fed sa te I ire dish. years. The AKRL Handbook is another excellent resource, and this has also contained some vers useful designs over the past few years. The current edition contains some nice designs for both 70cm and 23cm uplink bands. The best source of antenna design information lias to come from the Internet, and I make no apologies...

E

At this point, you have a high perform a nee downcon erter that takes a 2400 MHz signal and outputs it at 122 MHz. This is the configuration I use my downcon erter in. I like using it at 122 MHz because if i aeeiden- Photo IX Bandpass Filter reach to be soldered. IPhoto K5GNA Photo IX Bandpass Filter reach to be soldered. IPhoto K5GNA instead of sending RF into the converter m gt rig just says error, l your radio doesn't work at 122 MHz. you will want to replace the crystal. The crystal is on...

Modest Proposal

Prophesied nearly a decade ago, S-band has come of age with the 0scar-40 spacecraft With some revealing insights, here's why. Government health warning Facts can seriously damage your health This article contains facts. I have never been given much to arguing matters of a speculative nature. If don't know about something, I keep quiet. If I do know, I sa gt what I know. I will lenaciouslv defend any proposition that i gt a demonstrable fact, that can be supported and extended by reasonable...

Build the FODTrack

How about a low-cost tracking interface Here is a low-cost solution to fulfill your automated satellite tracking needs. Manfred Mornhimveg XQ2FOD has made this free for noncommercial use. He sa st If you want to reward me somehow write a piece of useful software and put it in the public domain 1 have built several of the FODTrack interfaces for less than 35 each using all new parts. Here is what I have found. The FODTrack controller connects to the parallel port the printer port on your...