Info

Difference between sfaf on swr and feedpoint swr Find the station * vron the horizontal scale and the perfectly-matched line loss in dB on the vertical scale. I he antenna feedpoinf swr may then be interpolated from the curves, In the example shown, the station swr is 2, the line oss under perfectly-matched conditions is J dB, and the antenna feed-point swr is 2.5, Fig. 2. Difference between sfaf on swr and feedpoint swr Find the station * vron the horizontal scale and the...

Kenwood Tss Hf Transceiver

For a limited time - purchase a TS-430S at our normal Low Sale Price and receive the optional FM-43Q FM unit FREE JheFftM3G provides HF FM transmit receive or bands where authorized CALL for Sale Price. KEtfWOOD TVMDODA 2m 70-cm fW Dual Bander Covers 142 148.995 MHz and 440-449,995 MHz with 25W out GaAs FET RF amplifiers, dual digital VFO'S, LCD display, 10 memories w oftset recall, scan & lithium battery back-up. Band & common channel scan, priority watch. 16-key Autopatch UP DN...

Fl

FL-6 6Hi Q Resonators with Lo-Noise PL-4H, 4Hi O helical resonators & U> Noise Tr. Amp. in shielded housing. (420-470 MHz) Extremely helpful at sites with many nearby transmitters to filter-out these oul-ofband signals. Provides all Dasic autopaich functions Secure 3 Digit Access 1 Aux On Off lunchon, Audio AGC Built in timers, etc Beautiful Audio1 Writ& can tot details and a data sheet Used * SCap ooard to provide Reverse Parch and La d L-ne Coniroi ol w tiedfe- includes Jr> d nne...

Weather Proof Enclosure

W6TYH combination array for 75 meters, 26 73 tor Radio Amateurs * September, 1985 with this term, it refers to patches of relatively in tense ionization ionized clouds of varying intensity and size, moving, appearing, and disappearing at random. At times, the intensity of ionization in a sporadic-E patch is much higher than that of the normal E layer When this happens, the radio wave is refracted from the electrical cloud and the signals, usually at a distance of 1200 to 1500 miles, are...

Qrp In Czechoslovakia

During the last tfiree rears totlow ing stations were occupied with operating QRP 0K1AIJ OK 1 AM V OK1DMP OK1DOC, 0K1DWG. OK1DZD, OKHFAO OKI AR. 0K1M3K OKlMNV OK2BEI 0K26MA. OK2BTT OK2PAW OK2SSJ, OK3YAC, OL1BBR, and ex-OL5AYF Among the most active hams is Pavet 0K2BMA who has been operating QRP since 1979, He has made about 3,000 con tacts altogether, *ith 100 DXCC countries on alt shortwave bands He uses his own homemade equipment. Jindra OKIAMM has also fulfilled the conditions for DXCC when...

Seagate Technology St Hard Drives

The Seagate Technology ST 506 hard disc drive utilizes proven Winchester teacnology for reliable storage of up to 5 megabytes of formatted data. Some features of this very popular drive are 5 megabit second data transfer rate, simple floppy like interface, high speed band actuator & stepper head positioning, requires only +5 & +12 vdc, and same physical size and mounting paramters as a mini floppy drive. This Sifeugari eoriipstible. drive is the same as used on many home personal...

Low Loss Foam Dielectric

RGaXtfS* shlefd Slfl.95 100 ft. or lie It. HG59 U 70 copper A m phenol- PI 59 PL-259 TetioniSilvcT or aOapV -.fiH'-i PL 259 USO J32 De Lftle Male C n j P -Double le Cpnrtl 1 RG8U ttir, shield. RG5BU tfO1 , shield KG5BU flhield . RG59U 100 foil shield, TV type flG8U97 shinld11ga lequiv B+dduti 8 U Heavy Duty Rotor Cable 2-1693,6-1893 Rdlor 2 18 ga 6-22 ga I'M' - FHI + i t 1 I F-i I Bfi I ilia 1 H patchcor i v. flCA i> pe pluQs i-fl enj FleduceT UG-i or 176 UG 255,PL BNCl UG 11D U Arnphi.,,,,,...

Mfj Portable Antenna

MFJ1 Portable Antenna lets you operate 40 30 20 T5 10 meters from apartments, motels, camp sites vacation spots, nearly any electncaiiy clear location where space for a fulf size antenna ts a A telescoping wtiip (ex ends to SJ m i is mounted on seif-sianding men Phenolic case Bum-m antenna tune teld strengM metef 50 feet RG-58 coax Complete rmjiti-band portable antenna system that you can usejrear y anywhere Lfpro 30C Aaits PEP

Aea

Advanced Electronic Applications has announced the ATU-1000 Advanced Terminal Unit, The ATU-1000 combines Morse. Baudot, ASCII, packet, and AMTOfl for complete HF RTTY operation. Both mark and space tones may be adjusted independently from 1000 to 3000 Hz, providing compatibility with all commercial and amateur tone pairs. For fixed-pair operation, an optional eight-pole bandpass pre-filter is selectable from the front panel The CW filter is adjustable from 700 to 2500 Hz, Re ceived signal...

Output

Schematic of a more practical circuit stock and found that then RB would be 43.96 Ohms. Substituting into the basic bridge equation, we find that RX (47) (47) 43. 50.25 Ohms. This value was so close to the original design value of 50 Ohms as to be indistinguishable in any tests I could make. Another reason why this basic bridge circuit is accurate is that it contains no inductors or capacitors and hence is frequency-insensitive if you look at the diagram of a conventional inline swr...

Bove And Beyoimd

Peter H, Putman KT2B 84 Burnham Road Morris Plains NJ 07950 One of the questions that is most fre-quentty asked by newcomers to the VHF* UHF spectrum pertains to feedline Km quite surprised to find as many hams as I do who spend several hundred dollars tor a muttimode transceiver for 2 meters, add on a too-Watt amplifier, and then feed ihe 13-eiemem beam with RG-BW cable1 On the VHF UHF bands, the transmit slon line can be the most critical link in the entire system, Cables that perform well on...

Mail Order Annie

There's a song from my college days written by the lale Harry Chapln It's a tale of a pioneer m the new West who has sent fot mail order bride Vjhen she steps down from Ihe stagecoach she's far from a beauty Out to the tonely pioneef she s the best ihmg mat ever happened to mm Her name was Annie. i doubt if Harry Chapin as interested In antenna design, but if he had been. J ihmh he mighi have written his M at f-Order Annte aooul the antenna-analysis program available from Sonnet Software li s...

Hafa A Dai From Guam

T was reading the April issue and real i ed 1 had not seen anything on Guam in quite a while. I thought I would send a line or two to let the readers know that Guam is active' The Manannas Amateur Radio Club fMARC) is an active club The club supports ihe island with communications for its Island wide activities. And MARC has Just elected its new officers president John Conners KG6JIC, vice-president David Chartler W1YRM, secretary Edward L Campbell KB6DAW, treasurer Sieve Shemenski KABGVS. And...

Cyprus

Aris Kaponides 5d4JE PO Box 1723 Umasaoi, Cyprus During last March, the Cyprus Amateur Radio Society had Us annual general meeting At this meeting a new Council was elected as follows Totos Theodos-siou S84AP. president. Arts Kaponides 5B4JE. secretary, PanteMs Lytndes 5B4CF, treasurer, and four council members, Chris Demetriou 5B*EI Thanos Aposto-Udes 5B4CR, Solos MUtladou 5B4JX, and Soros Metaxas 5B4LB. Larry Day 5B4LD has undertaken the task of writing up the history of amateur radio in...

Atlanta Ga

DXPO 1965 will be held on September 27-29, 1965. at the Lanier Plaza Hotel, *-& 5 and Monroe Drive NE. Atlanta GA. Registration will be 49.50. Some of Ihe premier attractions will be John Devoudere ON4UN. holder of 5BWAZ and author oi several books Rusty Epps W6QAT of ihe recent FO XX Clipperton DXpedition. and The first presentation of Carl and Martha Hanson's expedition to 3C1 For information or reservations contact Grover Meiner KC4BX. 720 Starlight Lane NE. Atlanta GA 303*2-

Callbooks

Performance Than Any Othej Morse, Baudot, ASCII, AM- Mor Bandtit ASCH AmDR SmiK It,F, ciiirkei (Software i ot Infiluded) I IL I O I ufiir mVtTSJon nst with vir tuall> anv softjVBre Built-in TTI RS-2 i2 ttnd loop Iteyer I O Optionjftl lii int h rack iuoujh klf 1 V IK opartition, 110 A< adaptor sup- Vf i T m Set Atm output ttme in depend en Set receive filters lo one Hk accuracy Set receive MARK SPACE filters inde-

Incorporated In The State Of California

390 Convention Way, Redwood City CA 94063 Telephone (4*5) 36 M44 U Jif4 Sh JtLiC* Ave flernoiftv C 'J7 J Phonn (415) 40*4755 Houil Moh f un IQarn-fiprn no C enHon e.n.lwriQd T'- t AOJCkii (Miens 36B trW. H ur* Mon mp & d' lOai ofl Ti Harry D Hooton W6TYH 1420 Shamrock Lane Lincoln CA 95648 If 15m is hot and your antenna s not try the V-bomb array, Today, the propagation on the high-frequency amateur bands particularly the 15-meter band is wild, to say the least. Excluding the WWII years, I...

Hamtronics Packet Amplifier

Hamtronics has announced a version of their 220-MHz power amplifier designed specifically for packet radio use, Calied the PPA 220, the new amptifier is similar to the Hamtronics LPA 2-40 but features Increased gain (up to 50 Watts out with 2 Watts in) and a built-in PiN-diode antenna switch to limit T R switching to oniy a few milliseconds. With its ultra-fast T R switching, the PPA-220 is an ideal amplifier for inter-area 9600-baud packet relay stations. For more Information about this and...

Cmc Communications Docking Boosters

Docking Booster

A new series of power boosters lor hand-he ids is now available from CMC Communications. The Docking Booster combines a 30 Walt power amplifier and a TG-dB-gam GaAsFET preamplifier to extend the range of your Kenwood, Yaesu, ICOM, or Standard HT. The Docking Booster Is mounted on a convenient bracket that fits on most car doors and incorporates the amplifiers, a microphone clip, dc cabling, and a UHF external an-lenna connector. Separate models are available for 2m and 70-cm handie-talkies. For...

Performance

Avanti Antena Beam Radio Amateur

1 squelch eontro tojfitjfp tuning indicator a 2 oies toi al active fUterinjg Bnilt- n 4 l fc t r Twin full wave tieteclors f gt C, coupled automatic threshold eorrec-tien A K vout AEA dealer toj a demonatrati n, or send our latest peeliicatIon sheet w Sn piti rul-Wi iihfcatNiK fr Jr All iil Applications, Inc. PO HBox C-2160 Lynnwood, WA OT036 -7373 ELEX 152571 U.S. Callbook 21,95 3,05 25.00 Foreign Callbook 20,95 3.05 24.00 Order both books at the sanne time for 45.00 including shipping within...

Ramsey D Digital Multimeter

Re utile accurate dtgttai 'ea-mioneii a a- amuingly ton cosi n-lime coIdt codi J puai Duttons. rarige s e-l-eci ii gt ri pla with 5ulo zero. iuLO poladly amp Jew BAT indicator Latjquutkty ai brn ttLiqiiph priti- renlgru 3freguencv rnngfli aach with pri rtmp dual sdectaftta Oflfi illrtM 0 ta activity indicator SprnV mj 50 MHj Eypicdk senihility Ir ueflcy mnf t pptn' ccuncy ThA rncjfii verulJl lt ar ress than feaiurFfs 3 - i.iblf gflle mfls 9 digits gale indicator Jjsptay hold 25mV i 150 MHz...

Crumtronics Software Division

COD ORDERS CALL 219 745-0350 or 219 435-2718 CRUMTRONICS i-n our nam logging is our g ma Supporting COMMODORE computers ONLY For ovor 3 years Software written by users, for usefs GAMES UTILITIES EDUCATIONAL 4 Please fioie Vo j mu amp r menimn Special Sales ytfe 10 in iririt Sal Endi 9 10 8 SOFTWARE Our oflwtirti .iirnngad in collections. flflch containing Game UtihUoK and E dgcetit Qiif Commrjriore 64 conditions gwEfage avf programs on tsadl disk Of lane collection. 0 lt Jf ViC-50 e 'loCfiOi S...

Icom

CF-1 Cooilmg Ian for PS-15 45 00 EX-310 Voice synth for 751, R-71A 39.95 SP-3 External base station speaker ,. 49 50 Speaker Phone patch - specify radio 13900 BC40A Memory back up 8 50 EX-2 Relay box m h marker 34.00 AT-100 IGOw 8-band automatic ant tuner 34900 AT-500 500 9-band automatic ant tuner 449 00 AH-1 5 band mobile antenna 7 uner 289 00 PS-30 Systems p s ft cord. 6 pir plug 259.95 OPC Opfional cord, specify 2 or 4-pm 5 50 GC-4 World ctock Closeout 99 95 HF linear amplifier IC-2KI w ps...

Field

The subject of Field Day came up al the weekly meeling of Ihe Friday Amateur Ha dlo Technical Society FARTS . I suppose it doesn t make any difference who brought it up. but it sure Caused a lot of stares m the Be yet Brook Yach Club alias Mac's Place in Keene, New Hampshire. After much discussion, the majority of the membership decided ft was time for another maximum or was it minimum effort Since there were no volunteers to chair the Field Day Committee, the membership, in its truly...

Vn Ct

The Candlewood Amateur Radio Association CARA will hold its annual flea market at Edmond Town Hall, Main Street Route 6 . Newtown CTh on Sunday, September 15,1985, from 10 00 am to 4 00 pm dealers may set up at 9 00 am . Admission is 2.00 tables are 57.00 tailgating is 5,00. Talk-in on 147.72M2 or 52 simplex For table reservations, send a check or money order toCARA. PO Box 143, Bethel CT 06801, For further information, contact Gene Marino W11DH. Valley View Road, Newtown CT 06470 203 426 852....

But at least you can listen

, p Ct AC 1 . 1W I0H1 fto Twrt The Panasonic Command Series With double superheterodyne tuning, you'll hear the world loud and clear. Now it's easy to listen in on the world's hot spots. Both the RF-B600 and the RF-8300 are packed with With the Panasonic RF-B600 Command Series features and buift to go anywhere, FM'LWyMW SW receiver The Panasonic Command Series offers something Its advanced microcomputer-controlled tuner lets for everyone. With equipment sophisticated enough to you preset up to...

Sultronics Hf Sloper

Sultronics Amateur Radio has introduced their HF Sloper series antennas for 160. SO, and 40 meters. The 5S-2A Duoband Sloper. which is only 45 feet long, covers 00 and 40 meters, and the 60-foot SS-3A Triband Sloper handles 160,60, and 40 meters. Both models are trapless and feature a 50-0hm coaxial feed. 12 solid copper wire, and a heavy-duty aluminum mounting bracket. The inherently low angle of radiation makes these models ideal for DX work when only a smail antenna is appropriate, and both...

Versa Tuner

And match any feedline continuously from 1.8 to 30 MHz coax, balanced line or random wire. Built-in SWR Wattmeter has 2000 and 200 watt ranges, forward and reflected power. 2 meter movement. 6 position antenna switch handles 2 coax lines direct or through tuner , wire and balanced lines. 4 1 balun 250 pf 6 KV variable capacitors. 12position In ductorsXeramic rotary switch. All metal btack cabinet and panel gives RFI protects, rigid cor stmction and sleek styling. Fllpstand lilts tuner for easy...

Alpha Delta Twinsloper Antenna

Alpha Delta Communications is now of taring the DX-A twin-sl ope r antenna Operating on 160. 60, and 40 meters, the antenna uses a tower or downlead as the counterpoise One side ot the antenna leet long operates on 40 meters, and Ihe other side 80 feet long is for 80 and 160 meters The 80 160 leg is broken by an iso-Res isolator resonator coil an rl choke to provide Ihe dual band capability. The DX-A exhibits excellent low-angle radiation and Can easily handle high power The antenna comes...

Michigan Tech

The Michigan Technological University Amateur Radio Club will operate specialevent station W8YY on September 13-22, 1935. to ceiebrate the University's centennial and the MTUAHC's golden anniversary. Frequencies are as foJiows CW 3 745, 7.145, 10 145, 14,070, and phona 1.845h 3,995, 7.2S5, 21,445, and 144.200 RTTY 3.625, 7 095. and 14.095 OSCAR when in range. For a commemorative certificate, send QSL and a large SASE to Debbie Parmer, c o WSYY, W Wadsworth Halt, MTU, Houghton Ml 49931. The West...