WE W~YH BEST! Reliable. ICOM's extensive line of reliable. field-proven handhelds and interchangeable accessories give you the most options for handheld communications. 2-meter. 220MHz. 440MHz or I.2GHz ...I COM has your frequency covered. 2-Meters. For 2-meter coverage, ICOM offers the IC-02AT and IC-2AT handhelds. The versatile IC-O2AT covers 140.000- 15 1.995MHz, the IC-2AT 14 1.500-1 49.995MHz ... both include frequencies for MARS and CAP operation. The IC-O2AT features an LCD readout. 32 PL tones standard. DTMF, direct keyboard entry, three watts output, (optional 5 watts output with IC-BP7 battery pack], 10 memo- ries and three scanning functions. The IC-2AT, the most rugged handheld on the market, has a DTMF pad, 1.5 watts output and thumbwheel frequency selection. The IC-2A is also available and has the same features as the IC-2AT except DTMF. 22OMHz. To get away from the crowd, ICOM has the IC-3AT 220.000-224.990MHz handheld with 1.5 watts output, thumbwheel selection and a DTMF pad. 440MHz. For 440MHz operation, ICOM has two handhelds available, the versatile IC-04AT and the IC-4AT. The IC-04AT and IC-4AT offer full cover- age from 440.000-449.995MHz. The IC-04AT in- cludes an LCD readout. 32 PL tones standard, DTMF direct keyboard entry, three watts output. loptional 5 watts output with IC-BP7 battery pack), 10 memories and three scanning systems. The IC-4AT has a DTMF pad, thumbwheel selection and 1.5 watts output. I .2GHz. ICOM announces the IC-12AT 1260.000- 1299.990MHz handheld. the first I.2GHz handheld available. The IC-I2AT features 10 memories, an LCD readout. DTMF direct keyboard entry, two scanning systems and one watt output. Accessories. A variety of interchangeable accessories are available, including the IC-BPS 800mAH long-life battery pack. HS-I0 boom head- set, CPI cigarette lighter plug and cord. HM9 speak- er mic (for IC-02AT. IC-04AT and IC-I2ATI. leather cases, and an assortment of battery pack chargers. - First in Communication ICOM America. Inc.. 2380-116th Ave NE3 Bellevue. WA 98004 Customer Sewlce Hotline (206) 454-7619 / 115 3150 Premter Drtve. SLJI~lP:.'I i. Irvtrig. TX 75063 ICOM CANADA. A Division of ICOM America. Inc.. 3071 - #5 Road. Un~9l , Richmond. I3 C V6X 2T4 Canada All slated speclllcatlons are approxomale and subl~tto change w~lhoulM tlce w obllgallon All l a3M radios aign!ticanlly exceed FCC !eg?gutarionslh nv!!nti ylur~uuse !rl#sstonr nn986 Work VHF or HF Packet 4 On Any Computer With Kantronics Complete Packet Communicator From IBM to C-64, or any computer with an asynch- ronous serial port, you can now work packet on VHF or HF with one TNC, the KPC-2! ~xtraco st options are unnecessary. KCP-2 is packed full of features and backed by our full-time customer support departments. KPC-2 has totally new hardware and software, Kantronics designed. For more information contact Kantronics or a Kantronics dealer. Suggested Retail $;b14;88- SIG9 Features AX.25 Version 2.0 software 128K EPROM, 16K RAM - Supports multiple connects, up to expandable to 32K, 4K EEPROM. 26 Advanced software HDLC RS232 or TTL compatible (C-64 routines, eliminating costly out-of- too!) date chips HF modem included! (both U.S. and European tones) Carrier Detect, and software Extensive dealer network squelch operation In-house programmers/engineers FCC Part 15 Certified In-house service representatives Kantronics industry standard Periodic software updates (like extruded aluminum case 2.0!) Power supply and cabling included Want more information on Packet? All EPROM software is Kantronics Contact us about our new PACKET VIDEO. sourced and copyrighted $ 25.00 (shipping included), VHS or BETA format. "DX-citing. TaP -'.'*?s Compact high performance HF transceiver - ci~ustahrlll~,ll tr~rqlrr with general covpraqc receiver 00m emnrv ct~;:nricis f-rcqu~nc;vrr lel n' locle rn;iv 1163 %tf!rf.rl 111 Kenwood's advanced digital know-how Sul>r,~r.rr t?:i,tver dynamic range 10 ~ r ~ ~ ~TrO~ hj;s~roinli! ls;& ;I( h :;[111tI re brings Amateurs world-wide "big-rig" KPIIWOI iil [)./n;rM~x " h~ghsr ~ns~l~rvi~~relyr: l qi1c:nclcs may Is? slnrcrl 111 10 r:h:!nnrls performance in a compact package. We IIIIXII~~ t.yst~ncin s11res Ir~lf!1 02 dB IUI:I:IV~:I ILrJel~!t:; ~Ipr opr.ratinn call it "Digital DX-citementM-that special riynar1111rd ri 11. (500Hr1~:1ndw1dthon?Or1r) TU-R CTCSS ~rrlti( ol~ttn~i.lli feeling you get every time you turn the 100, <I~ :v(: ycle transmrtter Sol)lonr IS rnerrir ~r~iweldie ~1iU 8 IS tnsI;iIIed power on! S~rr~erlrf rrlf nl ionl~ngpe rrnrls conlrnr~oi~s Supcri! ~ntf-i.rcni..- rr,lcictlrir, < ,ver 111 Arnatotrr band\ kry down 11 r ~)F-rlr~desx cced~ngo ne hour IF str~ltl,~ rne:rt>l~r!i i~I(.hlrl ler, riolw 1~I;rrikr~r. I ,r ,11r,r,11 r:(lvcf:jclr rfic'e~vi?ti~rn w 1rc!111 Rf ~njnrpl oivi~rIS rated a1 700 W PEP on ;~ll~r~rnscric~ ~~c:l~RF.t r~, ~I~?IIIfI3;lIll~XCll, II, 11 kH/ 30 Mtij 1 ;rsrIy ri~r~rl~1l0t1 f~l SSN. 200 W I)(: (in CW. AFSK. FM. and 110 ;rrlil ol111nfi:rIl ~llvr\1 1gIitO RM t ll hlAHS ,il~r!r;lllerri \nl I)C AM r 1 Iir FJS 50 [)OWPI ,,i~l~l~I\l y MC 435 LIP l)O\YF! ml;. ~n,;'iiiled D~reckt eyboard entrv of freqoency rrr~cclr.11In r ~-!,rillr~k~oduust y I Compirt~rr nic3rfr!cep rmr! All modes b~rtll-~n 5 IF filter fucict~ons IJSB.L SH. CW, AM, FM. Ducil SSR IF f~ltrrrng ,111rAl FSK Mndp A bulll-in SSB f~ller1s ;.r.llztllnn I\ v~rtl~e~nd standartl. Whfin an I.lrir~.r.C nric opt~onaSl SB irller Bu~lt~at~n~ tonlatrc (YK-88s or Yk-88SNl IS antenria t~rnrr ~nstnlledd, ual I~Her~ng (opt~onal) i i8vr-rY 80 10 rnc,tc.rs VS-1 volcr !.-:t~tli,~. srrw (nptlnn,rll * P\?,AT~LZ, ~r~~ll~st,l>l~ .,, V.p llc,l.li,,,, ,.,,,,,,,,,,,, , ,,,,,,,. ,:.., Kenwood takesyou T . IX I I I II~~ ~~~I~ I 111 tC11 from HF to OSCAR! .A1 1. .JI I >,n[,,!'.lI T~oI>,~inI#I~~r. ~1r1~1r,l(l> lI lthli 111 11 I1 :"4:jC!lC 111 lk~vcl~r;lt n~,l;$lc,l~n!.U ~ 1 1 ~ ~ ~ 1 ~ ~ ~ 1 ~ .II.(,, >IV r,LK. .I<t k){n,<{II. r:. \ fM, :,n> Ri~ 1i.t1,I. t3~..0,,o,L n1 1I1:Ir1!tikl1Il11,t~1vI;11 ~17r. l 7wsI 0~t w'I !11v~:. 1r~;\ 1I(,i, I,:-,,~wr ,(,~iv. x~1tt1Ill~~1t~pcr1rrI1ksi P,t 1rS-~1 Y .K~' icHrH S riv.td :.I I.H,,/l R kH? SSH t~\lr,r,. mr ~~~IAP(I:H'> ,:<.~I, ,,,,, ,<,l,t> >",-., " A3C IUI'l !n~ol,ll<,T~I#< ,<t pt,,,,,, s +I:, S,l>t.i l ~c~:~~lar ~51t' l.1~0~Ir>n1itE~ ~~~ nwt 8Ir' r,p~,~k#>rAcIA, l~tVPI HI ', h,incl ni<~hrlq, 11, I ,11 ,i111~,n.c1r,i1$1 l111n-1 lre!1r1 8>t11il .- TI !>?:>A <:.' \!' k ',>/-I #? 11r '1 ,v ,wtf,',, ll7~Ih,r nn~~~1~1 c I.i~In!t>l~l~-~, rlI~~!,I>l ~I.f. tl IS 7SC/WMrCT C,lI:%?l ?~SI1~ IO~lIAI:PI ~~1:l11l~1l1~o10 ~f(~~l ~A~~r."~OI,', ,O~,,"x ~,t,t. ~,, ,,, , ,,, ,.,. ., :,,,:< ,;,..,,, ,, :,,, ,,,,,3,, ,,,v<, ,sI,,,,< , ;,,,,r,j ,,( , , ,,v,,,,,,, ,II, ,,,, ~cr,I-,"eI,.~ :5 0er,Ie~ , TC 1\R1~1In OWl~-rK$lt<En;WCtNn .;lW \llll~nOirorOt1 ,Dl rq,+ C0l 7O7M0 MUNICATIONS IY, ;>s, .~lI,tO C, ,,tllce ?,,,I,< ,I,, t !,O,,l, ,! magazine N( contents 10 understanding and handling noise Ulrich Rohde, KA2WEUIDJZLR 25 a simple 80-meter receiver Ed Gellender. WB2EAV 31 receiver tuning mechanism selection Jack Perolo. PY2PE1 C 38 upgrading the Ten-Tec Argosy Cornell Drentea. WB3JZO 55 build a pocket-portable SSB receiver Cliff Klinert, WBGBIH 65 20-meter hf superhet Eric Bodner, N3ECZ 73 ham radio techniques Bill Orr, WGSAI 78 practically speaking Joe Carr, K4IPV 91 VHFIUHF world , "I," Joe Reisert, WlJR "I," y ~!,IC,,>J,,,<,,,,,> A All ,,,I,,, ,,I, We're sorry to report that presslng ~nternat~oribaul s~riessc orn inter m~~munwtstl l make 11 lmposs!ble for W6MGI to contlrlue 171s monthly cnlomn. ''The. Gurrr~R eport " Brrt wdre glad to say lh.4 Ern~r: has lprom~scdt o take tlmc from h!s busy schedule to wr~rpo ~;cas~or~Ja~l IIcI~W!~a tch these pages Ed 91 118 advertisers index 101 ham notes c,>, and reader service 102 new products 9 comments 6 presstop 84 DX forecaster 4 reflections 116 flea market 9 short circuits 114 ham mart November 1986 3 examining the EPA's rf radiation limit proposals: what do they mean? The United States Environmental Protection Agency, concerned with the public well-being, recently released a notice that explores options to prevent adverse health effects that may be associated with exposure to rf radia- tion. Printed in the July 30, 1986 Federal Register, pages 27318-27339 this notice presented an historical over- view of previously proposed and/or accepted radiation limitations (for example, the ANSl standards of 1966 and 1982) as well as reports of various studies involving experiments on laboratory animals. Most importantly, it built a case for a new set of levels to be considered for implementation in this country. There are important reasons for this action at this time. First, several states have independently enacted legis- lation setting their own limits on what they consider to be acceptable radiation levels. A uniform nationwide standard, especially one that utilizes the considerable facilities and expertise of the responsible federal agencies, would appear to be a better approach. Second, as a result of growth in the communications industries, public exposure to all forms of rf radiation is greater than ever before. (According to the recent EPA notice, there are approximately 4600 a-m stations, 4400 fm stations and 1100 tv stations in the United States.) But what is an acceptable level? Conversely, what is too high? The question is simple enough, but the answer depends on many variables. One of the first standards (ANSI, 1966) indicated that a power density of 10 mil- liwatts per square centimeter across the entire rf spectrum was a reasonable limit. In 1982 ANSl released a re- vised standard that took into account different levels of absorption versus frequency in the human body, which resonates somewhere between 30 and 300 MHz, depending on size, shape factor, and polarization. The revised standard called for a power density level of 1 milliwatt per square centimeter in that particular frequency range. As a result of continuing research and the need for a nationally-accepted standard, the EPA is calling for com- ments on the next generation of proposed acceptable levels. This time, a new term has been defined: SAR or Specific Absorption Rate (watts/kilogram). Mathematically a function of tissue conductivity, electric field strength in tissue, and tissue density, it can be related to our old units of measure - for example, power density and electric and magnetic field intensities. The EPA proposal discusses four options. The first three indicate specific levels of SAR; the fourth basically sets no level but stresses the importance of continued research. The least stringent option, Number 3, calls for a maximum SAR not to exceed 0.4 watts per kilogram of mass. I believe that's roughly equivalent to our old ANSl standard of 10 mw/cm2. Options Number 2 and 1 are correspondingly more stringent, calling for SARs not to exceed 0.08 and 0.04 wattslkg, respectively. There is considerable evidence to indicate that above an SAR of 4 wattslkg, the core temperature of the hu- man body increases, leading to health complications. Notice that the EPA's option Number 3 (the least strin- gent) is one tenth of this amount. However, pre-existing health conditions such as poor circulation and normally elevated body temperatures reduce the level of acceptable SAR. At this point you're probably wondering, "How does this affect me?" It's a good question, but I'm not sure of the answer. The EPA specifically proposed (on page 27334) to exclude radiation from "consumer electronic products" from the proposed standard. I think that category includes our transmitters, linears, and other equip- ment. The EPA's primary aim is to protect the public from radiation from high-power rf sources - mainly a-m, fm, and tv stations running many kilowatts. But perhaps this might be added incentive for the few "superpower boys" out there to either cut back or move their families away from the high rf fields. In this short space it's not possible to cover in detail many of the points brought out in the EPA notice. I highly recommend that interested readers obtain a copy of these 22 pages and specifically review several of the 62 cited references, as well as an excellent article on the subject ("The Microwave Problem," by Kenneth R. Foster and Arthur W. Guy) that appeared in the September, 1986 issue of Scientific American. The conversions from power source to rf radiation levels to SARs are derivable or well-documented. Through its investigations and those of other agencies, the EPA hopes to bridge that last gap in understanding - the one that would relate SARs to health - and thereby provide a nationwide rf radiation standard that we can live with. - Rich Rosen, KZRR Editor-in-Chief 4 November 1986 Matching Pak: V%wJ A - - --- .--- . vb .% -:\_A- T5-7' 411 / i VHF/VPF ;lIl-rnode base stations TheTS-711A 2 meter and theTS-811A Automatic mode sc c.,: 70 centimeter all mode transceivers You may select the rnodc rnarlually are the perfect rigs for your VHF and uslng the front panel mode keys. UHF operations. Both rigs feature Manual mode selection is verif~edin Kenwood's new Digital Code Squelch International Morse Code. (DCS) signaling system.Together, All-mode sqclelch. they torm the perfect "matching pair" High performance noise blanker. for satellite operation. Speech processor. V~qhlys iahle clual d~g~tVaFlO s. For maxlmum efflclency on SSB 0 Tlic~1 0 H I step, dual d~g~tVaFlO s offer and FM. excellent stab~l~tthyr ough the use of a IF shift. TCXO (Temperature Compensated "Quick-Step" tun~nq. Crystal Osc~llator) Vary the tuning chamcter~st~cfrso m L;?rge fluorescent multi-function "conventional VFO feel" to a stepplng d~splay. i I . , , , , , I act~on. Shows frequency. RIT shift. VFO AIB. ~\AII,~, II~I ILII~I1I0,I :~1 ,,IJII' C~,III"I', I(:ILJ Ruilt-in AC power supply. SPLIT. ALERT, repeater offset, dlgltal I..I. IIIIIC~)II ~Fh A Ari ;1It31t" 1~111i:t11!j4ns Operation on 12 volls DC IS also code. and memory channel yo^^ Ih~ strn for ;icl~\wlvo n your pr~or~ty poss~ble. 40 multi-function memories. i:h;~nncl whll~I~ sl~:rl~onr?g ,? riothf:r Semi break-in CMI. with side tone. Stores frequency, mode. repeater off- frenuencv. A Kenwood exclusive! VS-1 voice synthesizer (optional) srtl. and CTCSS tone. Memor~esa re RF power ou!pt.ll control. More TS-711Al811A ~nforrnatlonis b;>cked up w~tha bu~ll-inl~ thlumb attery. Continuously :~djust;lble from 2 to ava~lablefr om author~zedK enwood 25 watts. dealers. Option,?! accessories. IF-1OA coniputer ~nterface MC-48B 16-key DTMF. MC-43s UP/ IF-232C level translator DOWN rriob~leti aritl rn~croptiones CD-10 call slgn dlsplay SW-200AIB SWRlpower meters: K E N W O D SP-430 external speaker SW-200A 1.8-150 MHz VS-1 voice synlhesizer SW-2000 140-450 MHz TU-5 CTCSS tone un~t SWT-1 2-m .~nttnnatu ner * MB-430 mob~lem ount SWT-2 70-cm antenna tuner a dMeClu-x6eO Ade. MskC l-o8p0 .r Mn~Cc-r8o5ph ones PG-2U DC powfSrc able Tc1 \R11IO lA-K,!EI,i' N?. ,lW,,>lIO,l,,,lO~l' ,,DI,,~. C.,,O!':( M MUNICATIONS [', ,,(,7 >,,I,,,,,,I I,,, ,,,,,I<,' ,<,v,,,.d ,>, ,,r!,(!,;,r,8 'n.t,,, ,.(,l,,.?,,, r ,,,, ,,I,,v,',,t,, ),,, I(,d,e , ! ,<,,r, ,,,,I,1, I,l.r *!,~, lhllc3-,,,r,m,l, <,*,cI<lr, !Vb l#r,d,! 17,8, 1e8!lv,r1+,,,1<,5,,8t or,< ! f!lc ',I, >* < ,.'.',<8tj<7\ ,,,,,~,lL,!, '211. :)I THE "ELECTRONIC COMMUNICATIONS PRIVACY ACT" WAS MOVING RAPIDLY toward Senate approval at presstime and may even have become law by the time this sees print. On September 19 the Senate Judiciary Committee unanimously approved the latest version of S-2575 after only 25 seconds consideration! Fortunately the Senate version, though still objectionable for its basic philosophy that U.S. citizens can't listen to any service or frequency that the government doesn't want them to. has been even more tempered than the version passed by the House in June. The bill now permits monitoring any radio communication "for the use of the general public" as well as cordless phones, marine or aircraft, Amateur, CB, GHRS, government, law enforcement, Civil Defense, private land mobile, or public safety (police and fire) communications which are "readily accessible to the public." Two Last-Minute Amendments Further Limit The-Senate Bill by elimjnating crimjnal penaltjes for intercepting (without malicious intent) broadcast remote pickup stations and by reducing the penalty for first interception of public land mobile services (cellular, older car phones, arid voice paging) to a $500 fine. These worthwhile amendments, proposed by the Association of North American Radio Clubs, were introduced by Senator Paul Simon (D--1L). If All Goes Smoothly e Bill Could Move Q ickk through the Senate Subcommittee 011 Communications and on to t c S enate floor, wherht could be voted on before the end of the month. However, columnist Jack Anderson's September 23 syndicated column took a very hard swirig at the bill, blasting the cellular telephone industry for having sold both Congress and cellular users a bill of goods on the legislation and "cellular privacy." Its very timely appearance could wcll induce some Senators to raise enough questions about the bill to slow up. if riot derail, its passage. Furthermore, though Senator Goldwater hasn't made his views on the bill public, it's considered unlikely to win his endorsement. A PRIVATELY ADMINISTERED AMATEUR CALLSIGN PROGRAM is looking more and more likely, with not only ARRL but several other groups interested in taking on the job. The idea has actually been urlder consideration at the Commission for some time, and FCC officials discussed it at length during the FCC Forum at the recent ARRL National Convention. Under Its Plan FCC Would Issue Only Basic 2x3 Initial Callsks to newly licensed Amateurs. An Amateur who upgraded could continue to use that callsign or go to the "Callsign Administrator" who -- for a fee - would issue a new callsign appropriate to the new license class. The FCC estimates charges for each callsign upgrade would be in the $20-30 range. There would also be an initial "grace period" during which those who wanted to recover a previously held callsign or one formerly held by a deceased family member could request and receive that callsi~m. The FCC Is Quite Interested In Moving Forward On The Proposal and could decide to solicit comments or~ it in a Notice of Inquiry or eveti "PRB-3" before the year ends. GEO-SYNCHRONOUS "PHASE 4" AMATEUR SATELLITES are being seriously considered by AMSAT A just-completed "Phase 4 Technical Study Plan" by AMSAT Engineering VP W3GEY proposes a pair of such birds, positioned above the equator so as to provide a "footprint" reaching from Japan and Australia eastward to most of Europe, Africa and the Middle East. 2 Meter Plus 7 24 And 13 c Tr-rs o a r s with a wide variety of capabilities would be carried-by the bird:: which wouldmbe zfmzd at a much broader segment of Amateur Radio than ever before with a strong "Public Service" orientation. It's possible that even mobile or hand-held radios would bc capable of working through the new satellites. Next Step For The Ambitious Provosal Is A Studybd Planning_P_eriodo f a year or so; launch would be targeted for 1990-91. Preliminary cost estimates are in the million-dollar range, meaning that very broad-based international Amateur support will be required. NfiA's 1995 "Space Station" Plan May Include A Built-In Amateur Station as a result of a recent mceting of NASA. AMSAT, and ARRL representatives. Possibilities look very good, and a working group has been set up to make a formal proposal to NASA next year. OSCAR 10's Salvare Efforts Continue TO Encourage Recovery Workers. though an upcoming solar panel eclipse and resulting battery discharge will soon put it temporarily out of service anyway. When sunlight does return to recharge its batteries, the chances that OSCAR 10 will be able to be brought back to useful life are estimated at no better than 50-50. M!ATls Fourth_&mupl Svace Symposium And Annual Meeting will be held at the Dallas/Ft. Worth Hilton November 7-9. Call AMSAT at (301) 589-6062 for details. FIRST RECIT'IENT OF THE "AEA AMATEUR AMBASSADOR AWARD" is Mary Duffield, WAGKFA, who was recognized for her work with the Redwood Youth Foundation, which has introduced hundreds of youngsters to Amateur Radio. The retired telecommunications educator received the honor and an accompanying $lC?00 cash award at ARRL's San Diego National Convention. Congratulations! U.S. AMATEUR POPULATION IS STILL GROWING, ALTHOUGH VERY SLOWLY. Most encouraging is the dropout rate, which has decreased steadily from an average of 1478 per month in 1984 to 1210 per month in 1985 and only 910 per month-so far this year. At the end of August the total U.S. Amateur population was 421.077. 6 November 1986 Ultim ble HT! * Heavy-duty f~naal nipl~flera nd heat slnk The d~e-casrte ar panel assures ' reltahle operat~onW llh the opttonal 12-volt PB 1 battery pack, theTH-205AT prov~des5 W output The standard 8 4 volt PB 2 provldes 2 5 W output It's here now! The affordable, (300 rnW low powpr) "Kenwood Quality" hand-held ceiver. Standard features include '- a large, easy-to-read LCD display, wide-range power requirements \ (operates on 7.2 VDC-16 VDC), 3-channel memorv. built-in I battery saver circiit, and, when operated on 12 VDC, a robust five watts of power! The die- cast metal rear ~anel/heast ink assures cool, reiiableoperation. Receiver frequency coverage from 141-163 MHZ-~aSl so I \ standard-you can even listen to the "weather channels" at 162.40 or 162.55 MHz! /I M~nttors wltchto check fre- qitency when PL encode1 df1r:ode swttch IS on. -/ Extended frequency coverage for certatn MARS and CAP , o~erat~ons. -,'' 3 nlenloly channels storr fre- qurncy ;?nO offset And so easy , to ~~sSeln'ip ly press the /' mcmrnoryc hannel-number to .' r~calylo ur favor~tec hannels1 --- .- --.- * Nlclht Ilghl, offsetlreverse. -" -- 16key DTMF pad for repealer a 2.. a~~topatc1s hs tandard. I) I,!., ' I, 'I?,,\:, ,,I;<!, :J,i.:lI ,I' 18.4, k ,', ;:. 111 ; !,I, 2) 11'; .' 14.1 \/ .>ill' ,<\.\'I i11~I),,,,1!! I,,!, k $7z, ?V ~.ill;",tl 3) if?1 ; . e' ','Pl~-!! :At8 k11l::d l,,,lI :>;I(b . ! I ', VJ ~lI~t84t), r~fll . I 7 .' :I I\I~O r,~t>wI~ I:II I,,!II (~,a.k,t 1 r, ~l,l,~~5il): l~',l~~~c!,f,il )r t~,~r~~~;!~~t~~~~~~,~lki!I#f~~~ l,all~rv,,7 ,,t, 6)l 4C ,- i4 pul, '?~rnt~l(n,rr I'li 1 ? '!, or .1 7) I%(R: ir.11lr.r; < 11 ~r<t*.~ I t8R I 3 frr '1 8)Shl(: ?I1 '.[I<,,,~'.IIX II~r, ,l>lrrtif9~) S(: I?.S T 17 Snll i';lsrt5 10) HA 3 IiA Icl~'.i.r![i~.ninrllr rina: 11) RA 8R Sl~~t~,~lt~ilc~,nlr!!l ~l!,~lJ k.3 C!l~::i!; ~-r~roclnr,nlOrc~. III~IIV Ii :li.!(I J: 111 ?'1 W Rr pqwrr tii~o~il~!Ir t i il l H I, I I, ~lt~~r.;t~,.it.s MR .I Mnt~~ll~t'r ;rrk,-l R1 I Swlvt'l rr!i~lrnl IPi; ,1V IIC' C ~ I " r% ?rI [IIC~I~.CI IU,I~ l'gtltnr I :11r1 l.11 I\\I-,L~b L, i' ~,,III~(,,d~k>, t~~1 ~v, ,'';I balicry i:i.se. A wide r;lnqr! of clu~ck- ch:!ngc, c.,~rnrnerr:tadl uly battery parks art7 avallahle. TRIO-KENWOOD COMMUNICATIONS ( ,>,,?, I?! I, ,.rv,. , *. >!1,,,>,,,7!,. ,,rv. ,,,.,,l,,l,J<II<,.,, ,,, 1,1,1J I,r., ,, K<.,,,,,.,,.li,t ,,I,,,. ,<,I, ,J,7, 1 , ,1.,/,1,'.1,.);,,,>I1,,,,,i,,,, ?, v.1 ,<< ,., ,, 0,. c11n11 r(VnJr~z~~W(l .~2,~ln~to~~l ?lorIf'~4~lr~l:r0.)1!7 ~ rt, ~ 1 ' ,il.il,'. Irl,,"'C. .!'I. .,,I>,1 "I :', ,,1,t! l i,,,, .I AFFORDABLE PACKET RADIO FROM MFJ ... An identical TAPR TNC 2 clone with a new cabinet and added features for an incredible S129.95! All you need Is your rlg, home computer w~tha RS-232 serlal port and a termtnal program I1 you have a Commodorn 64. 128 or VIC-20 you can use I 2 - MFJ's opttonal Starter Pack to get on the alr lmmedlately You get Inteffac- a = ing cable, terminal software ontape or disk and complete Instructions ... ? i " everything you need to get on packet radio. Order MFJ-1282 (disk) or MFJ- .I ,283 (tape,, s19.9r each. Unllke machine speclllc TNCr, you never have to worry about your MFJ-1270 c w being obsolete because you change computers or because packet radlo stand- ards change. You can use any computer wlth an RS-232 serial port and an ap- MFJ-1270 Join the exciting packet radlo revolu- proprlate terminal program. If packet radio standards change, software up- tion and enjoy error-free communica- dates will be made available as TAPR releases them. Also speeds in excess of $12 gg5 lions ... lor an incredible 5129.95' 56K bauds are possible witha suitable external modem' Try that wlth a ma- MFJ brlngs together efftc~enml ano- chine specific TNC or one without hardware HDLC as higher speeds come into facluring and TAPR's (Tucson Amateur widespread use. You can also use the MFJ-1270as an inexpensive digipeater. Packet Radio) leading edge technology to bring you affordable packet radlo. It featuresthe latest AX.25 Version 2.0 software, hardware HDLC for full du- YOUg et a nearly identical clone of the wldely acclaimed TAPR TNC 2 with plex, true Data Carrier Detect for HF. 16K RAM, simpleoperation plus more. identical software and hardware. It's In a new cabinet and includes a TTL Join the packet radlo revolution now and help make hlrtory. Order the .serial port for extra versatility. MFJ-1270 today. Here are MFJ's latest and hottest products for Improving your station's performance. SUPER 2 KW COAX MFJ's Best VERSA TUNER SWITCHES MSF1Jg-1.79025 $149.95 ' MFJ-W~C MFJ-496 lnrtlnliy select any antenna or rig by 5169.95 turning Ik nob. Dr- ~ r l mslas hed w/.t o $169.%! Get a full feature gamZes cables and ellminates plug- Super Keyboard that sends CW/RTTY/ASCII fw ging and unplugging. the price of a good memory keyer. or! You get the convenience of a dedlmted kwbolrd Unused are The MFJ-949C all-in-one Deluxe Versa Tuner It -no program to load-no interface to mnnect- gives you a tuner. cross-needle SWR/Wanmeter, just turn it on and it's ready to use. dummy load, antenna switch and balun ~na new Thlr 5 mde Super Keyboard lets You send CW, KW PEP, KWCW, For 75ohm Negllglble compact cabinet. You get qual~tyc onveniences loss, SWR,a nd crosstalK gives high performance, Baudot, ASCII, use it as a memory keyer and for and a ccluner-free shack at a super price' Morse Code practice. You get text buffer, pro- SO.239~. Convenient desk or wall mounting, A new cross-needle SWR/Wanrnster gives you MFJ-lms s19'95. porltlOCastn " grammable and automalic message memories. SWR, forward and reflected power-all at a Sin- cavity construction gives excellent performance eTrrRorI PdeLleEtio nO, bUufTfePr pUreTlo aLdA, bBuf fePr hOoWld. ER 4u%p toM 5H00Z M. HHeza vwyi tdhu ty, low loss6 s0w diBtb his hoalasr ilnenss a t g"le glance. tSoW sRe tI.S Haaust o3 m' aatnicda 3lly00 c womapnus tecda wleit.h Run up to 300 watts RF output-and match co- S 0th6a nlo 2ss0 amnidlli oShWmR mbnetloawct 1re:ls.Zis.t a2n xc e2,% lesxs 1th inacnh e0s.2. balanced lines or random wires from thru 30 MHz. Tune out SWR On dipoles, vees, Ion9 MFJ-lml, M9.95, wltlons, ,mitem arkable wires. verticals, whips, beamslquads. lOx3x7 in. surface for recording ant, positions, I,/z in, DIGITAL SWR/WATTMETER ANTENNA CURRENT - MFJd18 voltage and current for all your analog and dig- ,FM $79.95 $89.95 ital clrcutts. 3 completely Isolated outputs. 2 Thls nn bwkthru MFJ Antenna variable 1.5-20 VDC at 0 5 amp and a lixed 5 Curnnt Pmk lets you monitor RF VDC at 1 amp. Connect in serles or parallel antenna currents-no connections Fully autonull for higher vditage and current. It's short cir- needed! Determ~nec urrent distri. SWR 1:l to 1:9.9dlrectiy and ~nstantaneously-no cuit protected, has excellent line (lyp.0.01%/ bution. RF radlallon pattern dnd SWR knob to set. Huge 0 6 inch brlght orange V) and load regulation (tyP.O.l%). Lighted me polarl~atigpo f antennas, transmis- digtts make across-the-room reaatng easy. 12 ters monitor volt./cur. 12~3x6in . 110 VAC. sion lines, ground leads, building segment LED bar graph wattmeter gtves instah- taneous PEP readings up lo 200 wall RF odtput. CROSS-NEEDLE SWR/WATT wiring, guy wires and enclosures. Good, bacl. mlrmltch trl-color LEOS lndlute MMEFTJ'rE cRro ss-needle MFJdl5 $59.95 , S'W lOnRed.t spclomto *nrt ndtselhan~t lesolndm inglforr ros !maIlnnO teenn nnda g lubatntebtrladsolua aennn cd e .g huigyh SebaWilesRy u- tcsoeo-.rn edFalotdlro d5nl0gr .l otSahmlm dai slslp yslsiaztyee mm(5sa'/.k2 1e x.s8 4 .13l/10*i dxeM a1Hl 1fzon.r . 11ma2 n od- SWR/Wanwter glva wires thal ca:~d istort antenna rield patterns. VDC or 110 VAC with MFJ-1312. $9.95. you SWR, torward Detect RF ndlatlon lrom ground leads. power and reflected power mrds or build~ngw ~ringth at can cause RFI. MOBILE ANTENN I -ail at a rlnflie Determine If ground system is effective. glance! SWR 1s auto- I • Plnpolnt RF lorloge in shielded enclosures. MFJ-910 $19.95 mat~callyc omputed Locate the asst place for you: mobile antenna Lower your SWR and -no controls to adjust. E Use as tuned f~elas trenght meter. Get more power into buttons select threa power ranges that gtve you Monlton RF current by sensing magnetic field. your moblle whip tor ORPto full legal limlt power readings. Reads 20/ Uses an electrostaucailys hielded ferrite core. FET solid signals and more 200/2000Wforward, 5/50/500 Wretlmed and 1:l RF amplifier, op-amp meter clrcuit lor excellent OSOs. Your solid state to 1: 5 SWR on easy-to-read two color scale Light- sensitivtty, select~vity.1 .8-30 MHz. Has sensi- rlg puts out more power and generates less heat. + ed meter. Needs 12 V. 10% full scale accuracy. tivity, bandswitch, tune controls, telescoping an- For 10-80 meter whips. Easy plug-ln installat~on. 6% x 3% x 4'/2 inches. tenna for fleld strenght meter. 4 x 2 r 2 inches. Complete instructions. Fits anywhere. 2'/zxZ1/zin MFJ OORBDLIEGRA ATNIOYN P. RIFO DNUOCT TS FARTOISMFI EM; FJ RAENT0U TRRNY WITI-TNHO- IN 30 DAYS FOR PROMPT REFUND iiesr Shlpplngl. ~~~~T 800-647-1 800 One vear unconditional ouarantee Add $5.00 each I shippin$/handltng Call or write for free catalog. Call~601~323~58I6nY M ISS dnd outside over 100 products. MFJ ENTERPRISESM, S39762 1 mntlnenta' USA Telex5 3-4590 MFJ STKV 60x494. Mlsslsst~pS~ta te. -- 8 November 1986 H 118