TS-140S_review_CQ_1988.pdf

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1、- oo o TheKenwoodTS-140 CompactHFTransceiver BY DAVE INGRAM, K4TWJ KenwoodsTS-I4OSHFtransceiverisadeluxe tittlegeminanattractivepackage LSBuseM.CHSCANA VFO BSPLITRIT WMN88./313./3 /3/3./3 /3-8.8 niceHolding the maintuningknobsrear ring while slightly turning itstrent ruotenzeogrip varies its tension

2、 in precisestepstosunyour h, od The rigs M CHNFO CHknobselects memories while in thememorymocle, and snutstrecuenctes in 10kHzsteps while in VFO mode. Theratterlunctionwould begreatlor mobiling il it was modiliedfor 100Hz step-lun- ing. Ten kHzjumpsare Quite wide! Fortunate- ly, however, theTS-1408c

3、anbestep-tuned in 10Hzincrements fromitsmikefor laid-back (lazy?)mobiling. Kenwoodalsohas an optional sun-visor-mountedboommike, a gearshiftlit- ledpnbox wilhup/downtuning buttons that interlacewith the T5-14OSlor hands freemo- bitingRememberthatitemif you drive a manual-shill orgelenterprising idea

4、s about adding remotecontroltotheT5-140. Continuingoururst-mcresscoviews,the TS-14OSdualwidthandadjustablenoise sideand a recessed bank01switchesalong its bottomarea. Although not apparent at first glance,sever- a! of the rigsfront-pane!switchesserve dou- ble duty for providingsome big rig capabili-

5、 lies. Holding theCW/Nbuttonwhen switch- ing on the TS-140S, for example, tete you choose beepsor Morsecode announce- ments of selectedmodesand memoryac- tions. Similarly, holding theCLEARbutton togglesbetween100 Hz and10Hzresolution in themaindisplay (See fig. 1) Likewise, hold- ing the RITbuttonse

6、lects1Oar20Hz RIT reso- lution, and theSCANbuttontoggles its boldfunctionon/oil.During scanning the RIT knobalsochangesreveryscanspeedOe- taining a keydownorlull-carriersignalfor checkingan antenna or tuning a linear ampli- Iieris also easy:switchtoCWwithlullaSK. thenpressthe mikes push-to-talkbar.N

7、o shorting plug orclosedkeyrequiredVery FirstOpinions Initialadpicturesofthe T5-1405donotdoit justiceThe rig issuver-qravincoerjust like the T5-430S or4408Us appearance reminds me of alillieT5-94OS, An internal speaker is mounted intnecabinetsright top area, acar. rying handle is includedonthelights

8、ide, and the RFamplifiersbuilt-in heat sink leaves the rear panelclearforfitting in tight spots. The aztront-oanetcontrols are laidout for easy op- eration,with asubpanel01controlsonthe right Severalyears agoCadillac addedasmall automobile called theCimarrontotheirline of Quality vehicles, Thecompac

9、tcarsported manyfeaturesarcappointmentssimilar 1 0 its full-sized counterparts, but it exhibited two rather attractive dillerences:small size for easy handling and a lowerpricelag IOf atto-o- ability. Todaythosesameconcepts01big-time performancein a smallpackagearemaking hoInewsinamateurtransceivers

10、. The results arewnatIcalllighthearted funrigs;theyare certectlorfixed. portable, or mobile opera- tions in atrulyenjoyable and tree-style man- nerArecent example01thosestatementsis Kenw()(xfsnewr5-1408HFtransceivertea- lured in this CO magazine review. The Kenwood15-1405is alull160 through 10metera

11、ll-modetransceiverwith 100watts cotcot.general-coveragerececucnfrom50 kHz to35 MHz, 31memories,scanning, speechprocessor,and semi or fullCWbreak- in operation. The rigmeasures3%Hx 101JWx11DandispricedataroundS800, Therigssmall size is a really bigfeature. especially when mobiling withrocevscars, as

12、it will fit intospacessimply100tight lor larger rigs like the T5-43OSor T$-44OSAlter remov- ing the ashtray andciqareuelighter inourMer- curyTopaz, for example, the T5-14OSSQueezed in without aninchto spare. Its internal heat sink and rear top-ventilatedIan.however,are still open toIreeairnowunderth

13、e dash for COOling,Inmyopinion, thetrade-ott 01abuut-tn antenna tuner for reduceddepthis a logical compromise. Isimplyoontendorse compen- salingloranimproperlyset antenna (with a tuner) il Icangettothe radiatorlorad- justments I understand the T5-14OSsettrec- livepriceis due toroootrather Ihanhuman

14、assembly.acootsusuallyexhibit exquisite QUality controlandccst-euecnveresults Othermanulacturerswill surelytouowsuit . EastwoodVillage No, 1201SoRt11,Box 499, Birmingham, AL35210 Fig1-OverviewoftheTS-140Smultifunction display, Various illustrated funclionsareoper- atedbyfront-panel controls. 42COsep

15、tember1988SayYouSawIt InCO blankeris averygoodfeatureinalow-cost rig. Itdoesanadmirable job inmi nimizing bothmo- T5140STSvomodeno 1,5A inlUIs;gnol Iiveringtheir fulloutput.Additional powercan I Currenldain T,onS1mode create soratter.andreducingmike gainto de-0 creasepowerdefeats aspeechprocessors I

16、-:-Operohnglempe,otue- 10 le+50CI+14 Ie +122F) effectiveness, Aseparatepoweroutputcon- FequencvIobdylesslhen* 10PPM trotsolvesthedilemma.Itsalsoa dandyway F,lWOCYaccu,acyl o.Ih.10PPM to limit yourbatterydrain whenoperatingcor- DimensIWHOJIP,ojlcloansinclul6,I kg113.4Ibol 30watts,andyoucaneojovcneort

17、wohours of 160 mbend 0 , operatingfromamotel orshopping-center let80mbend 0 ., , .andstill haveenoughjuicetostartlhe40mband . , car, 30mbend10.11010,15 , The T8-1408speechprocessor, incidental- 20mbend1401014.35 , y,doesagoodjobofincreasingtalkpower Fe:IvencvIle 17m b_18.068Ie 18.168MHz withoutaddin

18、gdistortion.Everyonewe con- 15mb_21.01021.45 , tactcomplimentslheT8-1408transmittedau- ore.Doubie-checking theircommentsonour 12mband24.89Ie24.99 , auxiliarytransceiver (a CollinsKWM-1 with a 10 mband28.0Ie29.7 , 3.1kHzmechanicalfilter)confirmstheyre 6mbandSO.OIe54.0MHz right. The 140 sounds reallyg

19、ood,evenwith 110w to w. itssuppliedgenericresponsemike. 160mbond_ OW OOW. 15mbond ACloserLook Ow. !12 mbond SS8 CWtoow A briefstudyollheT8-1408specifications I Ow shownin fig. 2 indicates it is alotofrig for the ! OulpulPO roow,w money,and acoupleofdaysofon-the-airoper- ow,w auonsconfirmirsasharplit

20、tle performer. 10mbond Sincemostof usaremainlyinterestedinhowa w rigperformsunderactualin-shack situations Ow orhowitcomparesto similarunitsratherthan SSBow W 6 mbood howitmeasuresinlaboratorytests,somespe- . w era! checksweremadewithyouinmind.Our lSB.USBB-.cedmodulolicrl erststransmitterputsa solid

21、105wattsintoMdulol R eocloncemodulet theantennaon160and 80,102wattson40 lo,levelmodulelicrl through15,and93wattson 12and10meters. . Spunou,ed.1 ICWI 1 9MHz1029.7MHILess11.- 40dB TheCWfunbreak-in has a reed relay.Itsap- 50MHz054MHzloo, ,han eo proximatelyasnoisy/quietasaT8-9408and C.,e, ,uppress,Mmel

22、lI.on 40 dB(;1 1.5kHzefeence) only a gnalshair louder thananICOM761. Un,ontedsdebondsupptess;ooMOfelhanso dB(,ith 1,5kHz,el1/)0rliT ocomentenuyN)rUlhiesize.5x:- at0u.Was$179.95,1599S Y ouutulou Dill18ca.t oTifietlOughfinbnefcme/IbJe.)tf0Fu/lcompattbtewithROSETechnicalsupporttine: TCPlJPf!JSS)Rr:81J-

23、S74-2980 moautetnctuaea.f;lC-uOmrn. 3652lfistCypresssi.,TampaFL3f607 pteasesend.0Tiy0sucrorouvr.r0TSC-;!2()/00FREEPut:ketCaILI/ug CIRCLE 121ON READER SERVICECARD .Wd. be handled with only three knobs. Careful ad- justment of the mike gain and RF output are necessary,however.as they are Quite sensi-

24、tive andltseasy to overdrive the ALC. I must agree withsandyabout the 1405s good looks. It mentally adds 3 dBs to the rigSen- JOyment. Exceptforthepreviouslymentioned touchyconnors.the only drawback Iveno- uceeis lackofSWR meleringItsnot always convenienttousernvctnerrig tor checking an- tennas. I r

25、eally should not complain, however. as Kenwood is doing well selling this mlJch transceiver at this low price. U.S. dollars have low value against Japanese yen, and the ell change rate continues to decrease. Our firsten-the-airOSOsnetted manyunso- licited reportsofexcepuonauygood transmit audio, and

26、 the compliments continue today. The lit1le rig just sounds good ! Receiver audio is also excellent and full-bodied. The IF shill is good for general operating, but seriousONenthusiastswiltwant to add the optionalY(3-.455CN250 Hz filter for big-time DXing. Another niceccucnis the H5-7micro earphones

27、. They are tiny in-the-earjobswith- out a headband You canrcntnemupandtuck them in a shirt pocket . even use just onelor motliling. That wraps up my lhoughts. Nowlets get a second opinion, SandysOpinions The T8-140Sis a big little rig, andImenjoy- ing it almost asrnucnas the diamond ring I could hav

28、e selected instead.Ive worked at SayYouSawItIn c a Numerous popular typesoftransistors are ap- parent in the receiver and transmitter. Digitat tuning is used with the microprocessor con- trolling precise divide byNstepsoffour loops in the PLL,allofwhich are referenced to a master oscillator. Startin

29、g at the block diagramslelltop area, incomingsignalsIromtheantennapass through low- and high-pass IiIters and into the balanced Direct FeeclMixer,018and019 This isa very effective and populardesiqn.typ- icaltyresponsible for the TSf40SSf02dBdy- namic range. The resultant 40 MHz converted signal pass

30、es through a monolithiccrystal lil- terand on to the second balanced mixer, 0 22 and 023, The resul!ant 455 kHz signat Irom tnatrcw-oorsemixer hastwopaths. One goes down to the noise blanker circuitry and switch and then returns togateouIF amplifier 027soutput during noise pulses. The other path pro

31、ceeds through027,anSSB1CWIFM or optional narrowbandONutter. andonto IF amplifiers030and 031 . The inclusion of 3SK73 MOSFETSin IF stages and 2SK1255 in mixers, incidentally,reuecteIhe useofpopu- larhigh-perlormance and time-proven de- vices. After clearing 031 , the signal proceeds through the SSBIC

32、W detectorllC3 (AN612, a newdevice), on through056,and to the speaker. During transmit, microphone-input audio is amplified by IC-1 (rightbottomof block dia- gram) and then passed through the mike gain control to074(05was the speech processor). The signal proceeds throughICo3(this chip is an SSBICW

33、heterodyne product detectoron receive and an SSB balance modulatoron transmil),whichnullsitsRFcarrier.I hecutput signal then passes through the 455kHz SSBfil- ler (exit one sideband) and on to086(again, a popular 3SK73 device). The output signal is then upconverted1040 MHzby1e-5,passed through the m

34、onolithic crystal filter, andot- reeled to079and080. This second miller down-converts the signal to a desired amateur band signal, which in turn proceeds through 081,01,02,and03(drivers),04and05(the RFtina!),through alow-passlilter,and on to the antenna The section labeledcontrol unitin the block di

35、agrams bottommiddle generates mix- er heterodyning signals lor frequency selec- tion. Rotating the main tuning knob causes a behifld.the-Iront-panel flywheel to break two LEDbeams.Prototranststorssense those in- terruptions, whicharethen encodecl and passeclto the microprocessor. That unit then send

36、s dividebyany number/N data to the Ptt.s.Through phase detectors, dividers, and COs.the resultant heterodyne/mixer injec- tionsignalis caused to change in 10Hz(or 100 Hz or 1 MHz) increments and thus tune the transceiver. All01the previously discussed T5-140Sclr- cuitry is contained onSill internal

37、circuit boards. Clever stacked assembly also allows one layer of circuit board to old out(like open- ing a book) for internal servicing and adjust- ment. OperatingtheTS14DS The T5-1405 is a stout little performer, and its small size makes it an ideal traveling com- panion. MyXYL,Sandy, WB40EE, and I use it atnone.mobile, and portable during trips to the GullCoast.Ilike its big rig frills and San- dylikes its easy operation.Aftersel1ing its re- cessed right-side controls, most activity can