CW keying is also provided in thisRFI filtered interface unit.No batteries or external power supplies are required.Author Note: This article was written in 1990 for the JUG, the monthly newsletter of the Northern California ContestClub (NCCC).I have updated it (January 1997) a bit, but it still is a bit dated.
I believe that CT now uses a differentparallel port CW interface so the keying portion of the interface circuit may not work with the latest CT revision(s).Caveat Emp to rI have been using TRPacket TNCIBM PC or com patibleCOM1COM2LPT1CT-TS Interface boxSERIALCONTROLKEY Kenwood TS-950or similarFigure 1. ![]() For Kenwood Software Free Scoring AtDupe and partial checking in milliseconds, displayingrunning scores, instant (usually) determining ofcountries and zones, and, of course, log printing anderror-free scoring at the end of the contest. IntegratedCW keying make working stations simpler and helpsreduce error rates.But thats not all. When the logging program interfaceswith a com puter- com patible transceiver, a host ofother features be com e available. Band-mapping stations,with the time and frequency au to matically entered,is a great aid to search-and-pounce operation. For Kenwood Software Plus Whatever TheIfyou use packet, on-screen packet spots with fast QSY to the spot frequency is another potential score booster.This integration of loggingdupingscoring, band mapping,packet spotting, and CW memory keying with rigfrequency control is available to those of us with a com puter com patible transceiver, a contest loggingprogram, and an interface that connects the other two.I cannot help you with the rig or software, but with thesimple, low cost interface described here, you can savethe 100 that Kenwood charges for their RS-232 converterplus whatever the CW keying interface may cost.This one-transis to r interface can be easily built in anevening, and provides full com patibility with the IBM PC and Kenwood radios (TS-140, TS-440, TS-940, orlater). For Kenwood Software Serial Com PatiblerigBetter yet, no external power supply is required.The Kenwood IF-232 Interface BoxFor about 100, Kenwood will gladly supply youwith an interface box that allows connecting your serial com patiblerig to a PC. Inside this box is (at most) 5worth of com ponents which provide three functions: TTL to RS-232 Line Driving Receiving RFI Isolation Power SupplyFour lines (plus ground) are connected: TXD (TransmitData, inverted), RXD (Receive Data, inverted), RTS(Ready To Send), and CTS (Clear to Send). For RFIisolation, Kenwood employs op to isola to rs and separatesradio ground from the interface box chassisground. PC to TS Interface 1 K6XX Page 2 and 3: Double inversion is provided, so th.
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