TS-60S_review_1994.pdf

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1、73Review - Number 5 on your Feedback card bySieve KatzWB2WIKl6 KenwoodCommunicationsCorporation AmateurRadio ProductsGroup 2201E.DominguezStreet LoogBeachCA908015745 Telephone: (310) 6395300 PriceClass: $1,210 TheKenwoodT5 605 50MHz all-mode transceiver. PhotoA.The Kenwood TS-60Sall-mode transceiver

2、: W hen Kenwood Introduced the TS-50S all-mode HF transceiver a year ago, therewere alotofjustifiableochsand -aahs from the amateurradioworld. The TS50S is the smallest, lightest full-powered (100Woutput)all-band (160-10 meters) full- featured HF transceiver ever offered10the coovnercial market. A n

3、umberofVHF enthu- siasts proclaimed,Ifonlyitcovered 6 me- ters, IdbUy this rig in a minute! IdontknowifKenwoodeverconsidered tryingtoadd 6meters tothe TS-SOS,butthey didcome upwithanother solution:the TS-6QS. which is the same size andhas the samefeatures astileT5-505, butcoversthe 6meteramateurband

4、only.TheT5-605is pricedat$1,209.95(suggested listprice),so notevery6meter user will runouttobuy one, butthe rig is special in a varietyof ways that maymakeitagooddeallorVHFers.Andits onlyseriouscompetition,the teemIC275H (similarly ratedandfeatured,butcovering both 6 and10meters),costsevenmoreat $2,

5、021 (suggested list price). Havingbeen activeon50 MHz since 1966 (Egad! 28yearsnowl) andhaving-grown up with 6meters fromthe AM days to 55 B andFMrepeaters, I leel particularly qualifiedto reviewequipmentforthis band. Alreadyowninglotsof 6 meter gear and not wishing to shell out over a kilobuckonan

6、experiment, I was amongthosewhodidnt rushrightout tobuy a T5 605 ,buta friendofmine, Chuck ArmstroogKD6EQW, did. tn fact, whenhewenttobuyone,there wasex- actly one T5-605 intheentirecountry thathecould find for sale froma distrib- utor,soheboughtit immediately, before it disappeared. In speakingwith

7、Jon KA6ZBI,themanagerofthelocalHRO store(Whoisalso a 6meier enthusiast), Ifoundthat the rig is so popularheliter- allycant keep anyin stock.This review isbasedonChucks radio,having serial numbertag#601 00237(maybethe 2371 honeever built?), purchasednew inJune 1994. TheRig TheT5-605Isarugged-looking

8、pieceofgear. With few front-panel con- trols,itappearsdeceivingly simple,but thisisaverysophisticatedradiothat holds itsownwith thebestequipment ever usedon6 meters. Despiteilsminiscule (7x2-3/8x9-5132, WxHxD)dimensions andtiny exteriorheatSink,itis also apower- ful radio,ratedat90wallsoutput power

9、(55B,CW,FM; 20WonAM ).Mostofthe transmitterspoweramplifier heatsink is in- sidetheradio,andis fan.V), switching between memory and VFO modes(MN),and clearing an operation such asamenuaddress (CLA). Someof these switches willbeinfrequentlyused,except in 16 73Amateur Radiotcaey-November, 1994 initials

10、etup,but need tobeonthe panel to avoid conlusion from having to address multi- ple menu items simultaneously. The panel switches withmore than one la- bel toggle between two functions. An exam- pleisthe AlP/Answitch which, when first depressed, activates the AlP feature (to pre- vent receiver overlo

11、ad in strong-signalenvi- rorvnents). When depressed again, the same switch activates the attenuator.Whende- pressed a thirdtime,itactivates both AlPand An. When depressed a fourth time, it rums AlPandATT off, clearing the systemandre- turning backtonorma/ lull-sensitivity receiver operation. Maybe J

12、apanhas alot of 6 meter operators inasmall area; I cannot envision ever needing the AlP or ATT here, since the strongest signalsI could find did not overload this receiver, anyway. Menu Functions Depressing the MENU button clears the frequencydisplayand addresseseither MENUA or MENUS,selectablewith

13、the front-panel AlBswitch (also used to switch between the VFOs).Youthenspin the main tuning knob to the menu itemyouwant, which is indicated on the left-hand side of the main display panel, then use the UP and DOWN buttonsto toggle the features of that menu item. As statedearlier, thissoundsmore co

14、mplicated thanitis. Forexample:sayyouwant to switch from full power (the defaultsetting) totheQAP 1() wanoutputlevel. Press the MENU button. then theAlB button, until the letter-A- ap- pears in the main display, then spin the runing knob until menu number-00-appears on the left-hand side under the w

15、ord MENU. Menu item 00isthepowersetting. Pushth e DOWN button twice, and youll see the dis- playgofrom 100 to 50 to 10, indicating youre nowset at 10 watts output power. Thenpush eitherthe MENU button again, or theCLR button, andtheradio reverts to normal opera- lion,butnowat the l OW power level. T

16、his all takes abouttwoseconds-not difficult atall. l!youwant1 0programa-petonelor re- peater operation, youd depress MENU, then B;then rum the runing control to bring up menu item#53, then depress eitherUPor DOWN toarrive at the right tone frequency (the PL tone frequencies are displayed direct- ly

17、inHz), theneitherMENUorCLA,and youre done. I wouldntdo thisonthe fly; whiledriving down the freeway at55mph, but its easy todowhileparked,oronthebench athome.Besides thesetwo MENU Iunctions there are38others,someofwhichare al- most silly. Sillymenufunctions: Fivelevelsofad- J ustable display brightn

18、ess(!);CWkeyingde- lay adjustable fromfull QSK (no delay) to 1.8 secondsdelay (a real long time) in 10 Incre- ments; AIT range (two increments); automat- icpower off function (turnsradiooffafter a period of non-use); three separatemenu itemsto adjust the beep tones the rig emits whenIunctioning cont

19、rols; etc.Whocares? But the TS-60Shasall these,andmanymore useful functions aswel1. Onenealthing abouttheriganditsMC47 microphoneistheabilitytoprogramthe mikes four -priority buttons to perform any of 26functions, allmenu-addressable. You could, for example, program the rig so that one of thepriorit

20、y keys controls the rigs out- putpower, and another one controls its mike gain (from High to Low, anyway), thus almost overcomingmyinitial objections to these items not beingonthefront panel. TheManual TheTS-60S instruction manualistypically- Kenwood excellent, withdear, conciseexpla- natiorJs of al

21、l controls and functions. However, it completely lacks any circuit description and leaves the owner wondering what the hecks inside therig. Thereisatwo-pager rou- bleShOOting-guide,butIt only pointsoutwhat should be obvious operatorerrorsandgives nocluesabout what todoifsomething inthe radio actuall

22、y fails. Id really like to see de- tailed circuit descriptions (e.g., -rhe received signal passesthough anine-section band- pass filter andisfed1 0the first AFamplifier, a 40673MOSFET, before reaching the first AF mixer, a doubly-balancedset of5082- 2800 hot-carrier diodes having an LO Injec- tion l

23、evel of+13dBmat 70 MHz; or whatev- er). In the old days, most equipment manuals containedsuch descriptions,andtheyhelped explainhowthe rig really workedandhelped theuser read through the schematic diagram andmake sense ofthecircuitry. Circuitry The rig comes complete withschematic di- agrams, a set

24、of four-page fan-foldeddual- sided sheets that appear complete enough tor me to offer this abbreviated description: The antenna feeds a low-pass filteralways in series with the receiver, as well as a 4()60 MHz bandpass tilter,andis relay-switched to either apairof2SK520JFETsinparallel (presumably fo

25、r a high jntercept point) asan - fan reaches maxiroom velocityandcre- ates an audible noise level thaI might bedistractingifthe operatordoesnt use headphones. Obviously, this circuitdescriptionis an abbreviated overview and doesnt go into much detail. but il offers the technical readers some feel fo

26、r the rigs circuitry.Ienjoy perusingschematic di- agrams.takingtipsfromthe pros-on circuit design. I was gratified that the TS60Susesdiscrete, rather than inte- grated.finaloutputtransistors (cheap, easytoreplace),anda push-pullout- putcircuit which shouldpractically eliminate any second-harmonic ou

27、tput, leavingonly thethirdharmonic to filter (8much easier task, sinceitssofar away from the desired frequency). Features and Options The TS60Scomeswith a6-1/2- toot-long DC power cable fused In both leads. using automotive-style cartridge fuseswhichare inexpensive and readi- lyavailable(hooray!).It

28、alsocomes with a mountingbracket, althougha betterone, model MB-13(listprice $47.95), is available. Other options in- clude a matdling heavy-duty AC power supply, model PS53 ($249.95); a high-stabili- tytemperature-eompensatedcrystal oscillator relerenceforthefrequencysynthesizer. model SO-2 ($179.9

29、5); anarrowCWfilter, YK-l07C($109.95); a variety of desk-stand microphones(MC60Adynamic$149.95; MC80 electret $104.95; MC85 multiple-ou1pUl electret with compression control andmeter $159.95),and oth erlesser-useditems. I wouldntbuyanaccessoryspeakerlor the rig, as itsinternaltop-mountedspeaker Is l

30、oud andsounds great. Unfortunately, the op- tionalCWfilterandTCXO are both solder-In, not plug-in, accessories.OtI,wen. TheTS-60SS meterand power output level meterare of the bar graphvariety and are quite uselul.The bar graph power output level display reads0to10;and provides0n- ly relative output

31、power indications. For ex- ample, on the unit tested, a display reading01 1corresponded to 5 watts output; 2 was lOW;about2Swas 15W; about 4.5was 20W; a bit overr:was 42W; and 10 was full power, which in this case was 95W or so. twasable to achieve all these different output levelSby usingthe menu-d

32、riven power output level control and by switching modes between CWand AM(AMalwaysrunslesspower thanCW/FM, regardless01the control set- ting). Thebargrapha-meter is quite good on SSBlCWandpretty uselessonFM,asis the casewithmostmultimode transceivers Ive seen. WhilethereceiversMDS(minimum discernible

33、 signal) on SSBlCWwas less than -130dBm(under 0.1J.lV).thea-meter doesntindicateanythinguntilabout-107 dBm(1J.lV)signal isapplied to the antenna jack. Above this signal strength, the meter is surprisinglygood.AnS9- signal was30J.lV; +20dB/S9was300J.lV(exactly a20dB .07V) (0.3V) (1.0V) (1.4V) (2.6V)

34、(7.5V) (30V) (300V) (3.2mV) (23mY) 0 , (.13V) (0.6V) (6V) (.5V) (.7V) (.9V) (1.2V) (1.8V) (3.1V) (4.5J.lV) (6V) o-6d8 Table 1. TS-60S MeasurementsTaken provided by the PLL UNIT, the same source asused for product detection in the receiver. Theoutputofthebalancedmodulatoris diode-switched to the same

35、 set01bandpass (crystal) filters used In the receivers second IF, then bufferedbyanother3SK131MOS- FETwhichhasALecontrolby biastoits sec- ond gate, before passing to the first transmit- ter mixer, a pair of 3SK131s having an L.O. injection at 62.35 MHz providedby the PLl UNIT.Themixers output is ban

36、dpass fmered and mixed again by another balanced mixer using a pairof 3SK184 dual-gate MOSFETs havinganinjection at 123.045-127.045 MHz, again providedbythePLlUNIT.Thesecond transmittermixers output at 50-54 MHz is bandpassfiltered, bufferedbya2SC2954 bipolar transistorandthen fed tolheFINAL UNIT fo

37、r additional amplilication. The FINAL UNIT consists of apredriver; type 2SC1971, a driveamp; a pair of push- pull 2SC1972s, and then the finalamp;a pairofpush-putt MAF492sor2SC2879s. (Dependingonwhereyou lookinthe schematics, bothparttypes are calledout) Thefinalsoutputsignal passes lhrough a54 MHzl

38、ow-pass filler before reaching theSWA protection circuitand antenna relay.The FI- NAlUNIT also contains ascctasucateetem- perature control system which drives the in- ternal heat sink cooling fan. In fact, the com- parator circuit which supplies signals to the fanmotordrivetransistors(threetype DTDl

39、14EK bipolars)hasthree separateout- puts to drive the Ian at progressively higher speedsasthe heat sink reaches higher tem- peratures! Speaking of fans, the one in the TS-60S kicks into operation after only 15 to 20 seconds keydown time at lull power. If you transmit longer, thefanspeeds up. When op

40、- erating atfunpower foranylength of time, the Transmitteroutputpower Inlo aSO-ohmload. 13.8 VDC supplV: SSB(peakVCWIFMHl 95WMEO 44WLOlOW AMHI20WMEO15WLOSW Receiversensitivity,closed5().ohm system: SSBICW MOS-130dBm 10 dB5-;-N/N-117.5dBm 51-107dBm $3-104dBm 55-98.5oam S7-89.5dBm 59-rtsdBm .20ee-57dB

41、rn +40dB-37dBm +60ee-20dBm IF SW2.19kHZ SqIchthreshold-125dBrn 2008NO-112dBrn OFO-92dBm 5 -113dBm S3-110dBrn 5S-108dBrn 57-105dBm 59-102dBm .2Od8-97dBrn +40 0894dBm +60d892dBm IF 6W5.05kHz Blockingdynamic range: Approx105dB AF preamp, or directly to the balanced JFET AF mixer (four2SK520s). de- pend

42、ing on whether the AlP circuitis in use or not. (The AlP circuit, when switchedON,bypassestheAF preamplifier, using switching diodes.) TheAIr(attenuator), if activated, is relay-switched. There is an intricate ar- ray01front-end protective components called a,ightningsurgearrestor cir- cuit, which a

43、ppears to be metal-oxide varistors inserieswithsmall-signal switching diodes to reduce the capaci- tance of theMaVs.This is acommon approach and might helpprotect the JFETsagainstlightningtransients. The localOSCillator injection to the firstFM RFmixerIsprovidedbythePLL UNITs output which tunes 113.

44、045- 133.045 MHz and produces afirstIF at 73.045 MHz (thisiscalleduocoo- vertirr;that is,erefirst IF is at a high- erIrequencythan the received signal input). The tuning range01the PLL is sobroadbecausetheTS-60Sdoes feature a 40-60 MHzcontinuous-cov- erage receiver,althoughit can only transmit in th

45、e 50-53.999 MHz range. The first IF is filteredbyXF1, a crys- talfillerat 73.045 MHz, before ltIe sig- nal passes to the second mixer, another pair of2SK520 JFETs; between the crystal IiIter andthe second mixer is the first IF amplifier, a 3SK131dual-gate MOSFET, which is AGC- controlledbybias appli

46、ed to its second gate. Thissamestagealsodrivesthe receivers NOISE BLANKER circuit, a common pulse- clippertype.The second mixer injection is at 62.35MHzand alsoprovidedby thePLL UNIT, to produce asecondIF at 10.695MHz. Thisisthe lastconversionstageusedfor SSB/AM/CW. Thesecond IF signalpasses through

47、 either a 5 kHz bandpass filter for AM, or a 2.2 kHz bandpass filter for SSBICW (or an optional, sharperCWfilter), before being amplified by a 2SC2712 bipolar IF amplifier, whose outputdrives a hybrid integrated cir- cuitproduct detector system using addilional postamplilication providedby apairof 3

48、SK131 MOSFETs and a balanced detector using a pair of HSM88AS diodes. The carrier injection totheproduct detector is a signal at 10.695 MHz providedbyltIe PLL UNIT. OnFM, ltIe receiver employs an additional conversion stage producing an IF of 455 kHz, standard in the FMindUStry.This last conver- sio

49、n stage uses an MC3372 integrated FM IF subsystem having its own local oscillator and a 12 kHz monolithic bandpass filter. Thus, 00 SSBICW/AM the TS-60S is ouei-corwersioo. whileonFMItistriple-conversion. This makes a good deal of sense, considering the FM IF subsystem integralioo available tooay, which helps make FM receiversassimpleas they are. The transmitted SSBICW/AM signal is gen- erated byanintegrated circuit balanced mod- ulator,typeuPC1037HA, which is audio-drtv- en by themicrophone preamplifiers, shaping circuitsanda 2SC2712 bipolarbufferamplifi- er, andhascarrier injection a