Yaesu FT-450D Operation Manual

Also see for FT-450D: Operating manual Brochure & specs Operation manual Technical supplement Manual

Page 11FT-450D OPERATION MANUALINSTALLATIONCONNECTION OF ANTENNA AND P OWER S UPPLYThe FT-450D is designed for use with any antenna system providing a 50 Ohm resistive impedance at thedesired operating frequency. Every effort should be made to ensure the impedance of the antenna system is asclose as possible to the specified 50-Ohm value. Note that the “G5RV” type antenna does not provide 50-Ohmimpedance on all HF Amateur bands, and an external wide-range antenna coupler must be used with thisantenna type.Any antenna to be used with the FT-450D must, ultimately, be fed with 50 Ohm coaxial cable. Therefore, whenusing a “balanced” antenna such as a dipole, remember that a balun or other matching/balancing device mustbe used to ensure proper antenna performance.AC Power SupplyFT-450DCAUTIONPermanent damage can result if improper supplyvoltage, or reverse-polarity voltage, is applied tothe FT-450D. The Limited Warranty on this trans-ceiver does not cover damage caused by applica-tion of AC voltage, reversed polarity DC, or DC volt-age outside the specified range of 13.8V ±10%.When replacing fuses, be certain to use a fuse ofthe proper rating. The FT-450D requires a 25A fast-blow fuse.INPUTDC 13.8V22AANTGNDEXTSPKRCATLINEARTUNERDATAANTENNAA0 5 20 30 40POWERONOFFRED BLACKFUSE: 25AV0 5 10 15 20Warning!The 100V RF voltage (@100 W/50Ω) is applied to the TX RF sectionof the transciver while transmitting.Do not touch the TX RF section ab-solutely while transmitting.CAUTION Do not position this apparatus in a location with direct exposure to sunshine. Do not position this apparatus in a location exposed to dust and/or high humidity. Do not expose the apparatus to dripping or splashing. Do not put objects with liquids on the apparatus. Ensure adequate ventilation around this apparatus, so as to prevent heat build-up and possible reduc-tion of performance due to high heat. Do not install this apparatus in a mechanically-unstable location, or where objects may fall onto thisproduct from above. To minimize the possibility of interference to home entertainment devices, take all precautionary stepsincluding separation of TV/FM antennas from Amateur transmitting antennas to the greatest extentpossible, and keep transmitting coaxial cables separated from cables connected to home entertain-ment devices. Be absolutely certain to install your transmitting antenna(s) such that they cannot possibly come incontact with TV/FM radio or other antennas, nor with outside power or telephone lines.