User manual YAESU FT-2400H-2 SERVICE MANUAL

[. . . ] Before using your FT-2400H-2, be sure to read and follow the instructions in the "Before You Begin" section of this manual. GENERAL DESCRIPTION Congratulations on the purchase of your Yaesu amateur transceiver!Whether this is your first rig, or if Yaesu equipment is already the backbone of your station, rest assured that your transceiver will provide many hours of operating pleasure for years to come. The FT-2400H-2 is an elite-class HF transceiver providing exceptional performance both on transmit and receive. The FT2000 is designed for the most competitive operating situations, whether you primarily operate in contest, DX, or digital-mode environments. [. . . ] QUICK POINT: By convention, LSB is used in the 7 MHz and lower Amateur bands for SSB communication, and USB is used on the 14 MHz and higher bands (the 10 MHz band is used for CW and data modes only). When the [AM/FM] button glows orange, it indicates that FM operation is engaged. Rotate the Main Tuning Dial knob to adjust the operating frequency. Alternatively, you may use the [UP]/ [DWN] scanning buttons on the MH-31B8 Hand Microphone to sweep up or down the current band. 3. Press the microphone's PTT (Push To Talk) switch to begin transmission; speak into the microphone in a normal voice level. ADVICE: The " " indicator will light up in the frequency display area, confirming that transmission is in progress. When transmitting in the AM mode, rotate the [RF PWR] knob so as to set a maximum (carrier) power output of 25 Watts. In the SSB mode, adjust the microphone amplifier gain to match the microphone and your voice level, set the [METER ] switch to the "ALC" position, close the PTT switch, speak into the microphone in a normal voice level, and adjust the [MIC] (gain) knob so that the ALC voltage (displayed on the right meter) stays within the ALC zone of the meter (up to 2/3 of full scale deflection) on voice peaks. ADVICE: The microphone gain of the AM mode has been programmed, at the factory, to a level that should be satisfactory for most situations. However, using Menu item "050 A3E MICGAIN, " you may set a different fixed value, or choose the "Ur" option, which then lets you use the front panel [MIC] knob to set the microphone gain in the AM mode. In this case, the [MIC] knob should not be advanced to the point where the ALC meter deflects. The ATU of the FT-2400H-2 includes 100 memories for tuning data. Eleven of these memories are allocated, one per Amateur band, so that each band has at least one setting preset for use on that band. The remaining 89 memories are reserved for the 89 most-recent tuning points, for quick frequency change without the need to retune the ATU. The ATU in the FT-2400H-2 is designed to match impedances within the range of 16. 5 Ohms to 150 Ohms, corresponding to an SWR of 3:1 or less on the HF amateur bands (6 m amateur band: 25 Ohms to 100 Ohms, corresponding to an SWR of 2:1 or less). Accordingly, simple non-resonant whip antennas, along with random-length wires and the "G5RV" antenna (on most bands) may not be within the impedance matching range of the ATU. ATU OPERATION 1. Rotate the [RF PWR] knob fully clockwise (to the right). Use the Main Tuning Dial knob to set the radio to the desired operating frequency within the Amateur band. Press the [TUNE] button momentarily to place the ATU in the transmit line (no adjustment/tuning will occur yet). The " " icon will appear in the display. QUICK POINT: The momentary press of the [TUNE] button will turn the tuner on, and the microprocessor will automatically select the tuning point closest to the current operating frequency. Press and hold in the [TUNE] button for two seconds to begin automatic tuning. [. . . ] Main (VFO-A) Mode ­6 dB ­60 dB CW/RTTY/PKT 0. 5 kHz or better 750 Hz or less SSB 2. 4 kHz or better 3. 6 kHz or less AM 6 kHz or better 15 kHz or less FM 15 kHz or better 25 kHz or less (WIDTH: Center, VRF: OFF) Sub (VFO-B) Mode ­6 dB ­60 dB CW/RTTY/PKT 1. 1 kHz or better 3. 0 kHz or less SSB 2. 2 kHz or better 4. 5 kHz or less AM 6 kHz or better 25 kHz or less FM 12 kHz or better 30 kHz or less 70 dB or better (160 - 10m Amateur bands) 60 dB or better (6m Amateur band) 2. 5 W into 4 Ohms with 10% THD 4 to 8 Ohms (4 Ohms: nominal) Less than 4000 µµW Squelch Sensitivity: (RF AMP 2 "ON") Selectivity (­6/­60 dB): Image Rejection: Maximum Audio Output: Audio Output Impedance: Conducted Radiation: Specifications are subject to change, in the interest of technical improvement, without notice or obligation, and are guaranteed only within the amateur bands. FT-2400H-2 OPERATING MANUAL Page 127 INSTALLATION OF THE OPTIONAL FILTER (YF-122C OR YF-122CN) 1. Turn the front panel [POWER] switch "off, " then turn the rear panel's [POWER] switch "off. " 2. Disconnect the all cables from the transceiver. Referring to Figure 1, remove the three screws from each side of the transceiver, and three screws from the top edge of the rear panel. [. . . ]