YAESU MD-100 A8XDesktop Dynamic MicrophoneThe MD-100 A8X features selectable low-cut filtering and high-emphasis active filtering that allow you to tailor themicrophone response for optimum voice clarity or DX punch. The MD-100 A8X is designed for base station operationwith the latest YAESU HF transceivers.A multi-axis pivoting mount lets you adjust the horizontal and vertical position of the microphone to accommodatevarious locations and heights, or you can remove the microphone from the base and use it independently (an auxiliarytoggling PTT button is provided, but the audio filtering and scan controls are not used).The base of the MD-100 A8X includes a large push-to-talk switch and latching button, along with a large rotary up/down slow/fast control for scanning. Jacks and cabling are provided to accommodate transceivers having either RJ-45or round 8-pin MIC jacks.WARNING!Do not use with the FT-2400H/-7400H series, FT-2500, FT-8500 or others than those listed, as damagemay result from modular jack wiring incompatibility.CompatibilityThe MD-100 A8X will work with past HF models thatinclude the round 8-pin jack (note- on some models, thescan function may not operate).When using the MD-100 A8X with the above transceiv-ers, set the MAIN FILTER switch to the THRU posi-tion. The LOW CUT and HIGH EMPHASIS filterswitches are disabled since no power is provided at themicrophone jacks on these units.LOW CUT “1”LOW CUT “2”FILTER “OFF ”FILTER “OFF ”HIGH EMPHASIS “ON”FREQUENCY (Hz)Imp 500-ohm 0dB=-75dBRESPONSE (dB)SpecificationsTransducer type:DynamicFrequency response:100 - 5000 Hz (-6dB)Audio characteristic controls:LOW CUT SwitchOFF position: standard frequency responsePosition 1: -3 dB rolloff from 1000 to 150 HzPosition 2: -3 dB rolloff from 1000 to 300 HzHIGH EMPHASIS SwitchON: +6 dB at 3000 HzSensitivity:-75 ± 3 dB at 1 kHz and 500-ohm (0 dB=1V/0.1 Pa)Controls:PTT switch, PTT Lock switch,Scanning con-trol (only for specific transceivers)Impedance:500-ohmDimensions:Base (WHD): 112 x 156 x 151 mm (w/o mic)Microphone: 42.5 dia. x 189 mmWeight: approximately: 670g (w/o cable)YAESU MUSEN CO., LTD.Tennozu Parkside Building2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 JapanYAESU USA6125 Phyllis Drive, Cypress, CA 90630, U.S.A.YAESU UKUnit 12, Sun Valley Business Park, Winnall CloseWinchester, Hampshire, SO23 0LB, U.K.YAESU HKUnit 2002, 20/F, 9 Chong Yip Street,Kwun Tong, Kowloon, Hong KongE 0 6 8 8 7 0 0 1