DR-735T Instruction Manual Thank you for purchasing your new Alinco transceiver. This Instruction manual contains important safety and operating instructions. Please read this manual carefully before using the product and keep it for future reference.
NOTICE / Compliance Information Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
:$51,1* To prevent any hazard during operation of Alinco’s radio product, in this manual and on the product you may fi nd symbols shown below. Please read and understand the meanings of these symbols before starting to use the product. Danger This symbol is intended to alert the user to an immediate danger that may cause loss of life and property if the user disregards the warning.
WARNING +DQGOLQJ WKLV SURGXFW Be sure to reduce the audio output level to minimum before using an earphone or a headset. Excessive audio may damage hearing. Do not open the unit without permission or instruction from the manufacturer. Unauthorized modification or repair may result in electric shock, fire and/or malfunction. Do not operate this product in a wet place such as shower room. It may result in electric shock, fire and/or malfunction.
WARNING 0DLQWHQDQFH Do not open the unit and its accessories. Please consult with your local dealer of this product for service and assistance. &$87,21 (QYLURQPHQW DQG FRQGLWLRQ RI XVH Do not use the product in proximity to a TV or a radio. It may cause interference or receive interference. Do not install in a humid, dusty or insufficiently ventilated place. It may result in electric shock, fire and/or malfunction. Do not install in an unstable or vibrating position.
%HIRUH 2SHUDWLQJ WKH 7UDQVFHLYHU $WWHQWLRQ • Do not remove the case or touch the interior components. Tampering can cause equipment trouble. • Do not use or keep the transceiver where it is exposed to direct sunlight, dusty places, or near sources of heat. • When transmitting for long periods of time at high power, the transceiver might overheat. This product is NOT a 100%-duty transmitter. • Turn the power off immediately if the transceiver emits smoke or strange odors.
%HIRUH RSHUDWLQJ WKH WUDQVFHLYHU ,QWURGXFWLRQ Thank you very much for purchasing this excellent Alinco transceiver. Our products are ranked among the finest in the world. This radio has been manufactured with state of the art technology and it has been tested carefully at our factory. It is designed to operate to your satisfaction for many years under normal use. PLEASE READ THIS MANUAL COMPLETELY TO LEARN ALL THE FUNCTIONS THE PRODUCT OFFERS.
6WDQGDUG $FFHVVRULHV Carefully unpack to make sure the following items are found in the package in addition to this manual.
,QLWLDO ,QVWDOODWLRQ 0LFURSKRQH FRQQHFWLRQ Connect the microphone plug into microphone terminal on the right side of control panel or into other microphone terminal in front of MAIN unit. Insert the plug until hearing a click. IMPORTANT VOL When connecting, take care to the modular plug direction. $QWHQQD &RQQHFWLRQ Connect antenna port to 50: antenna that covers 2m/70cm bands, using good quality 50: coaxial cable.
Initial Installation DC voltage range for operating this transceiver is DC 11.7V to 15.8V. IMPORTANT Transceiver will not operate out of this range. Inspect cable and connection regularly to be sure there is not any damage or burning.
Initial Installation 1 2 4 ④ Match the catch in the main unit with the slot in the front panel and fit the front panel into the main unit. 4 5 ⑤ Slide the front panel unit until it locks securely in place. NOTE By using the optional separation kit EDS-30, you can use the control and the main unit in separate positions. The length of separation cable is 5m. See page 75 for details.
Initial Installation ,QVWDOOLQJ D 0RELOH $QWHQQD Use a 50: coaxial cable to connect the antenna. Mobile antennas require an appropriate mounting base for proper installation and operation. For more information, see the documentation for your antenna. Screw-fixed base Magnet base After installing your antenna, ensure that you have the best possible SWR reading. High RF environments can cause severe damage to your unit.
&RQWUROV &RQQHFWRUV DQG 'LVSOD\ &RQWURO .H\V 2SHUDWLRQ 0HWKRGV There are 3 types of key operations; simply press, press after pressing [FUNC] key while FUNC appears on the display, or press and hold. • [Press] refers to one time quick press and remove finger. • [FUNC + this Key] refers to one time press [FUNC] key and then pressing this key while FUNC appears on the display. • [Press and hold] refers to press key and hold it. Hold timing is adjustable in set mode; however factory default is 2 sec.
Controls, Connectors, and Display Functions that requires press and holding to be activated No. Key Function B Left band [VOL] knob Switches between VHF/Air-Band and UHF on the left band (P.19) C Right band [VOL] Knob Switches between UHF/VHF and Air-Band on the right band (P.19) H Left band dial Switches between VFO and memory scan on the left band. (P.58) I Right band dial Switches between VFO and memory scan on the right band. (P.58) J [FUNC] key Sets mode. (P.
Controls, Connectors, and Display 5HDU 3DQHO ④ ⑤ No. Key ① ③ ② ⑥ Function A Connects an external 8: speaker. Output audio from right band. When External Speaker Jack 1 [SP1] another speaker is not connected to [SP2], left band audio hear through internal speaker. Also [SP1] used for connecting clone or PC cables. B Connects an external 8: speaker. Output audio from left band.
Controls, Connectors, and Display 'LVSOD\ 一 ䷵ ䷶ 丁 丂 ䷷ 七 ䷸ 丄丅 ䷹ 丆 ䷺ ䷻ ䷼ ䷽ ䷾ ䷿ 万 丈 具 No. Key 兹 兺养 兼兽 兾 兿 Function A Appears when advanced set mode is available. (P.48) B Appears during AM reception. (P.36) C Appears during transmission when other band is set for mute. (P.52) D Appears when APO function is activated. (P.49) E Appears when setting the key lock. (P.62) F Appears when [FUNC] key is pressed. (P.17) G Appears when in the digital voice communication mode. (P.
Controls, Connectors, and Display 0LFURSKRQH (06 ② ① ③ ⑥ ④ No. ⑤ Key Function A UP B DOWN Decrease the frequency, memory channel number, or setting value. C MAIN PTT Press the PTT (Push-To-Talk) key to transmit. Also press this key to confirm your selection. D SUB PTT Press the PTT (Push-To-Talk) key to transmit on sub band. Also used for other functions depends on setting in set mode. (P.45) E LOCK SWITCH Locks out the UP and DOWN keys. F MIC Speak here during transmission.
%DVLF 2SHUDWLRQV 7XUQLQJ WKH XQLW RQ DQG RII By press and holding the PWR key the power is turned on. By press and holding the PWR key again, the power is turned off. To avoid accidentally turn on/off, PWR key operation is designed for press and hold. PWR key 6ZLWFKLQJ WKH 0$,1 EDQG In this instruction manual the MAIN band refers to the band which selected for transmitting with MAIN icon on the display. To select MAIN band press left or right volume knob.
Basic Operations 6TXHOFK OHYHO VHWWLQJ Adjust threshold level of the squelch. A squelch eliminates the background noise when a signal is not received. Turn the SQL knob clockwise until white-noise (the background noise when a signal is not received) and [BUSY] icon on the display disappears. low high SQL knob for left band low high VOL knob for Right band The SQL should be turned fully counterclockwise when receiving weak or unstable signals.
Basic Operations 7R UHFHLYH VLJQDOV 1. Be sure to have the unit connected to the appropriate antenna, powered on, set the audio volume and squelch level properly on both the MAIN and SUB bands. 2. Select the desired band and browse frequencies or select desired frequency to listen to ongoing communications. The S-meter shows relative signal strength when the transceiver detects an incoming signal, and the RX indicator lamp (green) S-meter turns on. 3.
Basic Operations 5HYHUVH )XQFWLRQ This function is for monitoring the transmission frequency instead of reception frequency in repeater operation. This technique is commonly used to check if it is possible to communicate without using repeater by monitoring the accessing station’s signal strength. 1. Auto repeater setting Set SHIFT first. Press FUNC key then press MW key while [FUNC] appears on display.
Basic Operations 5. Releasing the PTT key will complete the transmission and the unit will return to the receive mode. Pressing the DOWN key together with the PTT key will transmit the CALL tone signal. DR-735T will transmit the Tone Burst signal. NOTE IMPORTANT If you press the PTT key while out of the transmission frequency range, the [OFF] icon will appear on the display and no transmission will occur. 6HOHFWLQJ 7UDQVPLVVLRQ 3RZHU 1. Press H/L key.
6HW PRGH Please read the following pages thoroughly prior to changing any parameters. The parameters in set mode cannot be set without entering the set mode. IMPORTANT By entering the set mode, some of the radio’s operating parameters can be changed to suit your application. The following is the selectable parameters menu. $ OLVW RI VHWWLQJ PRGH SDUDPHWHUV Copy or cut the following list of the setting mode parameters for your convenience.
Set mode 7R XVH WKH VHW PRGH SDUDPHWHUV VHWWLQJ PRGH 1. Press and hold FUNC key to enter the Set mode. Menu number and parameter will appear on the display. 2. Select a menu by pressing left dial knob to decrease menu number or right dial knob to increase menu number, or UP/ DOWN keys on the microphone. Push and hold dial for parameters slide show. 3. Default display Rotate the dial to change settings. Rotate left dial to change parameters on left side and right dial for right side. 4.
Set mode 6HW PRGH PHQX 0HQX &KDQQHO 6WHSV VHWWLQJ This is to select the channel step to be used in the VFO mode. Refer to the P.21for the sequence of the actual steps and how they are displayed. 0HQX 2SHUDWLQJ PRGH VHOHFWLRQ Operating modes are determined by the modulation of the radio signals. The transceiver has total 5 operating modes (AUTO, FM, NFM, AM, NAM modes). The mode selection is stored independently for each band and memory channel. Typically, AM mode is used for the air band (118–136.
Set mode 3. Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode. IMPORTANT Pressing PTT switch will not exit the set mode setting. 0HQX 6FDQ W\SH VHOHFWLRQ This is to select the scan resume condition. The BUSY setting resumes scanning when received signal is gone and TIME setting allows the radio to resume scanning after 5, 10, 20,30 or 60 seconds.
Set mode 2. Rotate the dial to select a desired item. SKIP : Skips unwanted channels that inconveniently stop scanning. ALL : Repeatedly scans all frequenciesover the entire band regardless of the SKIP or FAV channels. FAV : Scans only favorite channels. 3. Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode. 0HQX %HHS OHYHO VHOHFWLRQ This is to change the volume of a beep sound during operation. 1.
Set mode 0HQX 9)2 %HHS VHOHFWLRQ 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 07. Factory default setting is [OFF]. 2. Rotate the right dial to select a desired item. This setting is individual regardless of the band or VFO. 3. Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode.
Set mode 0HQX &RORU PRGH VHOHFWLRQ This is the mode to select color mode for various conditions. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 09. 2. By rotating the right dial, the display changes as shown and the color mode function selection is changed. 3. ALL MEMORY GRADTN RAINBW Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode.
Set mode 0HQX ,OOXPLQDWLRQ FRORU VHOHFWLRQ GXULQJ WKH ZDLWLQJ WLPH 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 10. 2. By rotating the dial, the display changes as shown and the illumination color selection during the waiting time is changed. 3. SB CL0 SB CL9 Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode.
Set mode 0HQX ,OOXPLQDWLRQ FRORU VHOHFWLRQ GXULQJ WUDQVPLWWLQJ 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 12. 2. By rotating the dial, the display changes as shown and the illumination color selection during transmitting is changed. 3. TX CL0 TX CL9 Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode.
Set mode 0HQX %DFN OLJKW WLPHU This is back light timer setting when radio is operated refers to dimmer setting on menu 13. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 14. 2. By rotating the right dial, the display changes as shown and the back light timer is changed. 3. Pressing any key other than the dial knob or the UP/DOWN keys will complete the setting and the unit will exit the parameter setting mode.
Set mode 0HQX $WWHQXDWRU VHOHFWLQJ The attenuator prevents distortion of a desired signal by very strong RF signals near the desired frequency or when very strong electric fields, such as from a broadcasting station, are present at your location. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 16. 2. By rotating the dial, the display changes as shown and the Attenuator selecting is changed.
Set mode NOTE Memory reset (P.73) will delete memory channels data even when memory protection is set ON. Channel’s data can be changed temporally even when memory protection is set ON; however change will not restore. 0HQX 6XE 377 DOORFDWLRQ IXQFWLRQ This is to allocate desired function to the sub PTT switch on EMS-79 microphone. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 18. 2.
Set mode 0HQX .H\ SXVK DQG KROG WLPH VHOHFWLQJ This is to change the time for push and holding key for switching band, scan, set mode, key lock, CALL, recalling channel, programming memory in easy mode, etc. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 19. Factory default setting is [2] seconds. 2. By rotating the right dial, the display changes and the key push and hold time will be changed. This setting is individual regardless of the band or VFO. 3.
Set mode 0HQX 5HVWRUH VHWWLQJ This is to restore set mode settings. This function is useful to restore settings after resetting the radio. After Adjusting parameters in set mode use this function to restore the settings. IMPORTANT Color setting and some other setting out of set mode cannot be restored. 1. Press and hold FUNC key to enter the parameter set mode. Press dial to select menu 21. Factory default setting is [OFF]. 2.
8VHIXO IXQFWLRQV 6LQJOH EDQG PRGH This is to use the unit as a single-band transceiver only for VHF or UHF, by eliminating the display on the one side. 1. Press FUNC key and while [FUNC] appears on the display press VOL knob for desired side. Eliminated band will not operate. 2. To return repeat above sequence. 9)2 $XWR SURJUDP 6HWWLQJ IXQFWLRQ This is to program various automatic setting in a certain frequency range in the VFO mode. It is useful for quick repeater access. 1.
Useful functions 4. To disable this function, delete the APL memory channel data. IMPORTANT Shift, offset, CTCSS and DCS functions cannot be changed during VFO auto program operation. 6FDQ )XQFWLRQ Use this function to automatically search for signals. In the set mode, chose TIMER mode or the BUSY mode to determine the desired resuming condition. If the CTCSS (TSQ) squelch or DCS squelch is set, the audio can be heard only when the tone / code matched the incoming signal.
Useful functions 0HPRU\ 6FDQ 1. Enter Memory mode for desired band. 2. Sequence is same as in VFO scan. Use UP/ DOWN keys for Commands. 'XDO 0HPRU\ 6FDQ 1. Enter the dual memory mode. 2. Sequence is same as in VFO scan. Use UP/DOWN keys for Commands. 6NLS DQG IDYRULWH FKDQQHOV VHWWLQJ A memory channel set as skip-channel will be excluded from scanning during memory scan. This designation can be set even after the memory is programed.
Useful functions 3URJUDP 6FDQ This is a type of VFO scan, which is done by setting the frequency range of the VFO into the P{A and P{B channels, it only scans between those frequencies. Each band can be set for 5 pairs. This program scan will operate under VFO setting, regardless of memory setting for step or P{A/B memory setting. P1A P1B P2A P2B Air-Band P3A P3B P4A VHF 1. Enter the VFO mode and set the P{A and P{B frequencies into the designated memory channels.
Useful functions 7RQH 6FDQ This function automatically searches for the CTCSS tone an incoming signal might carry. This feature is useful to search for the encoding tone of a repeater, or to communicate with a station operating in TSQ (CTCSS squelch) mode. 1. Press FUNC key then repeat pressing key while FUNC appears on the display to enter the CTCSS decode setting mode. appears on the display. 2.
Useful functions '&6 6FDQ This function automatically searches for the DCS tone an incoming signal might carry. This feature is useful to search for the encoding tone of a repeater, or to communicate with a station operating in DCS (Digital Code Squelch) mode. 1. Press FUNC key then repeat pressing key while [FUNC] appears on the display to enter the DCS decode setting mode. 2. Press the UP/DOWN keys on the microphone for more than 1 second but less than 2 seconds to start scanning.
Useful functions 6KRUW &XW NH\ Various functions can be assigned to key. There is not a factory default allocation for this key, therefore only beep will be heard by pressing this key. 1. Enter to set mode and select desired item. 2. Press and hold key until beep sound to be heard. When this function is activated appears on the display. 3. key operates on both VFO and memory modes. 4. To cancel repeat step 2. to rewrite key, delete registered data first and then register new item.
Useful functions 6HOHFWLYH &RPPXQLFDWLRQ Many repeaters require a CTCSS tone or a DCS encode setting as a “key” to access a repeater system, or a receiver using CTCSS or DCS squelch, so called “selective-calling”. Sometimes, CTCSS or DCS decode features are used on the output of a repeater so they can be used to open a squelch. In this mode, regardless of the main squelch status, the audio can be heard ONLY when the matching tone/code signal is received.
Useful functions CTCSS chart (Hz): 67.0 69.3 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 162.2 167.9 173.8 179.9 186.2 192.8 203.5 210.7 218.1 225.7 233.6 241.8 250.
Useful functions $XWR GLDOHU This function is used to transmit a memorized DTMF code, such as a telephone number, up to 16 (0 to 9/ABCD#*-) digits. 7R 3URJUDP WKH $XWR GLDOHU 1. Press and hold FUNC key then press MW key. 2. Rotate left dial or press UP/DOWN keys on the microphone to select channel number. 3. Rotate right dial to select code, push dial for next digit or MW key for previous digit. To delete the code press and hold dial. 4.
Useful functions 3. Press the FUNC key or the PTT key to enter the digital communication mode. Repeat step 2 to exit and return to the analogue FM mode. 4. To cancel the digital communication mode, repeat step2. EJ-47U When activating this setting, a code is displayed and switched by rotating the dial. But it does not affect the function EJ-47U. Please disregard this setting sequence.
Useful functions &DEOH FORQH IXQFWLRQ This feature will copy the programmed data and parameters in the master unit to slave units. Connection Make a cable using 3.5 mm stereo-mini plugs as shown. Make a master unit by setting and programming it as desired. Turn off both units. Connect the cable between the DATA jacks (SP1) on both master and slave. Turn both radios on after the connection is made.
Useful functions Entering a frequency directly Frequencies can be entered directly by pressing the numerical keys of the microphone. 1. Set the microphone DTMF/REMOTE switch to the REMOTE position. 2. DTMF keys can be used to enter total 6 digits from the digit for 100 MHz to digit for1 KHz. If entered frequency be out of tuning step, closest digit will set. (Ex.) When setting 144.20 MHz with the turning step set to 20 KHz.
0DLQWHQDQFH 5HIHUHQFH 5HVHW Resetting the unit returns all programmed contents to their factory default settings. By using restore function (menu. 21),(P.47)setting can be restored but memory channel data cannot be restored. Use cloning software, interface cable and computer to save and restore memory data. 1RUPDO 5HVHW %DVLF 5HVHW This is to reset setting for VFO, memory and advanced memory modes. 1. Turn on the radio by pressing PWR key while pressing FUNC key. 2.
Maintenance / Reference 7URXEOHVKRRWLQJ Please check the list below before concluding that the transceiver is faulty. If a problem persists, reset the transceiver. This can sometimes correct erroneous operation. Problem Possible Causes Potential Solutions Power is on, nothing appears on the display a. + and – polarities of power connection are reversed. a. Correctly connect the red lead and the black lead of the DC power cable provided respectively to the plus and minus terminals. b.
6SHFL¿FDWLRQ General Frequency coverage: Transmit DR-735T 144.000 ~ 145.995MHz 430.000 ~ 439.995MHz Frequency coverage: Receive 136.000 ~ 173.995MHz 400.000 ~ 479.995MHz Operating mode Antenna impedance Operating temperature Power requirement Frequency stability Transmit Current drain Receive Microphone impedance Ground method Dimensions Weight F3E 50: -10°C ~ +60°C DC13.8V±15% (11.7 ~ 15.8V) ±2.5ppm Approx. 12.0A Approx. 600mA (Max), Approx.
ALINCO,INC. Head Office: Yodoyabashi-Dai Building 13th Floor 4-9, 4-Chome, Koraibashi, Chuo-ku, Osaka 541-0043, Japan Phone: +81-6-7636-2362 Fax: +81-6-6208-3802 http://www.alinco.com/ E-mail: export@alinco.co.jp Printed in Japan Copyright Alinco, Inc.
