TABLE OF CONTENTS IMPORTANT. PRECAUTIONS il b EXPLICIT DEFINITIONS: Lo UNPACKING i TABLE OF CONTENTS i 1 PANEL DESCRIPTION M Front panel w8 M Rear pans| 5 W Function display 7 W Microphone (HM-12) LB 2 INSTALLATION AND CONNECTIONS | 916 W Unpacking Sis il e W Mounting: the transceiver 9 M Antenna.
1 B Front panel PANEL DESCRIPTION Ve pgs. 34 ©@POWER SWITCH [POWER] (pas. 21, 23) Turns power ON and OFF. D Fowler OFF @ TRANSMIT SWITCH [TRANSMIT] (p. 23) Selects transmitting or receiving. 71 Receiving S Tran smiting @ HEADPHONE JACK [PHONES] (p.
1 PANEL DESCRIPTION Seepage Seeing 7 o0 copes @ MAIN DIAL (b 19) Changes the displaced frequency. anther band change indicator is displayed: the: main fiat changes the band. @ BRAKE ADJUSTMENT SCREW {n. 38) Adjusts the multidimensional. Light ( \ Heavy. @ kHz TUNING STEP SWITCH [kHz (b 20) Turin the 1 kHZ lining step ON apd OFF Kz fining indicator 523 g VEGA Moo | s While this indicator s displayed, the main changelings the splayed frequency in 1 k2 steps; @ MHz TUNING STEP SWITCH [MHz] (0.
@ MEMORY. CHANNEL UP/DOWN SWITCHES [DOWNSIDE] (p. 29 = Changes the displayed memory channel number . in the VFO mode. < Changes ihe displayed memory channel initiate memory mode; @ ANTENNA TUNER SWITCH [TUNER] {pgs. 27, 28) Tureens the antenna tuning ON whee ar optional an: senna tuner is connected. *Optional AH-3 and AT-180 HE automatic antenna tuners: are bailable. @ RIT CONTROL [RIT] {p.
2 B Unpacking After unpacking immediately report any damage to'the delivering carrier or dealer. ‘Keep the shipping ca dong: M Mounting the transceiver Select a location for the transceiver. that allows ade: equate air circulation; free from extreme heat, cold. or vibrations, and away from TV chats, radios and other electromagnetic sources. INSTALLATION AND CONNECTIONS For ia list ‘and a diagram of accessory equipment included with: the ses UNPACKING on. the inside front page {p.
2 INSTALLATION AND CONNECTIONS M Power supply connections [ CAUTION: Be tore connecting the DG power ca Use an optional PS.86 or IC.PS30 DC POWER sup. | D10, hoke the following Important floe. Make rwtgeirl‘-x Withdraw: power. +The [POWER switch Is OFF. ‘ * Quint vantage of the power source is 1215V when you want: 1o use A noncom: power supply: DG power cable: polarity is correct.
INSTALLATION AND CONNECTIONS 2 B ASK terminal unit connections When operating an ASK such as RITZY. ACTOR or See pgs.6 and 8 for BACCHIC) socket information-and packet, connect external ‘equipment 1o the ACCRA) microphone ‘connector information. stonkered the rear panel Frito the microphone connector on the front panel as in the diagram below. USING THE ACCRA) SOCKET {Rear panel view) @& B8 & TEE L ARKS out ® Py c AF input T e {SQUELCH input Ground (GND) o CASK TERMINAL UNIT.
3 OPERATION M Initial settings Be tore performing the initial settings; make sure ali con: notions required for ‘your system are ‘complete by referring to section 2. {SQUELCH CCW. [POWER}: OUT \ Befog power ON, set controls and switches as shown initiate figure: below; CW . Max. clockwise COW Max: counterclockwise INBOX: OUT LATTE DUT [PREAMBLE OUT: {LOCKE QUT. accede ouT] [ (Comp E oUT | [LEVEL CENTER' Basic operation .
3 ope Ration B Frequency setting «For ham band use 1) Push VFG 10 select the VEO mode! * Then. push [VFO} again fo change VRO B SEC AT VEG Bl appears uss LTI Push [BAND]. N (hand change indication) appears, uss Mopping | 3} Rotate the: main dial to' select the desired band. Thea digits change: i e magician | These digits aid tie operating mode are At changed by the: And stacking register. 4} PushiIBAND}again: WY disappears.
M Split frequency operation Split frequency operation allows you:to: transmit and receive on two different frequencies: The delinquency operational basically performed using 2 frequencies on VEO A and VEO B. Following is a basic example for setting 21.260 MHz {or receiving and 21,360 MHz for transmitting: 1) Select VFO A then, st 21.250 MHz (USE) in VRO AL yss: 2igs00a" ! 2) Select VEQ B! then, set 21.360 MHz (USB) n VFO B. USs: 2 (J6000 .
3 ope Ration M Optional antenna tuner operation AH3 HE AUTOMATIC ANTENNA TUNER The AH:3 matches the 10 an antenna more than 3m/10 ft long (3.5 Mz and above} or more than 12 M40 ft long (1.8 MHZ and above).
OPERATION 3 AT-160 HE AUTOMATIC ANTENNA TUNER The AT-160 matches the IC728/720 10 the antenna automatically :The memories for auto: preset..No preset operation is necessary. When changeless the operating band; the AT 180 aus automatically presets forth band: : Then when you start transmit tog; the the: anteing exactly. Uninteresting is necessary.
4 MEMORY CHANNELS M Memory channels The ‘has: 26 memory: channels. : The memory mode is vernacular for quickly changing 1o often used frequencies: Memory channels 1~ 22 can be programmed with one frequency and one mode in each memory channel. Memory channels 23~ 26 also have the special tun: sons described in the diagram ar fight: M Memory channel selection 1) Push' MEMO[ to select the: memory: mode. Normal memory channels MEMO 1= MEMO 22 One regency.
5 scans M Scan types The has 3:types of scan functions which provide tremendous scanning versatility at the touch of & few switches: Select the scan which matches your operating needs: PROGRAMMED SCAN Repeatedly scans between two scan edge frequencies (memory channels 26 and 26} Bean Scan sedge Avior B MG Scan sedge Biro K Jung This scan operates in'the VED ‘mode: MEMORY SCAN Repeatedly scans:all memory channels: This scan operates in the memory mode, SELECTED MODE MEMORY.
M Programmed scan operation SCANS 5 Programmed scan can be started in either the VEO made o the memory mode. 1) Select the desired operating mode. ».The operating: mods: can lase be changed . while scanning. 2) Bet [SQUELCH] open or closed. »See page at leftover condition: 3) Push [ENCY: then, push [VFO] to start the scan. * The VRO mode 18 automatically selected: 41 When the scan defects & signal; the scan pauses or ignores it depending on'the squelch condition.
6 MAINTENANCE AND ADJUSTMENT M Disassembling the transceiver Follow the transceiver disassembly procedures shown: here whatnot want 1o install an optional unit adjust internal units; root replace an internal fuse: sig: CAUTION: DISCONNECT the DC power cabs from.
MAINTENANCE AND ADJUSTMENT 6 O REMOVING THE PA UNIT 1) Disconnect 1he Pin connector farm i7 on the Plenitude as: shown in'the figure below: 23 Slide the tuner control socket up:ahd remove it from the holder (BY OPENING THE PA UNIT. 1} Remove the: PA unit 28 shown in the box tattie: 2} Unscrew the 19 screws 1o remove the PA unit shield cover as shown in the figure below.
6 MAINTENANCE AND ADJUSTMENT M Fuse replacement Hat use blows writhe transceiver stops functioning, fry to find 1he secure iof the: problem; then replace: the damaged fuse with a new, rated: fuse. CAUTION: DISCONNECT the DC power cable front: the transceiver when changing the fuse, The 1-7281729 has types ot Tues installed for trans receiver protection: < DG power cable fuses .0 catholicity fuse L20A ELEM POWER CABLE FUSES REPLACEMENT Ty i el To Erg Coleen 20 Fuse UFO PR T i CIRCUITRY.
MAINTENANCE AND ADJUSTMENT B B Frequency calibration (approximate) A very accurate frequency counter is required 1o calibrate the frequencies of the . However. & rough chilies may be performed by receiving radio station WWY, frothier standard frequency signals: The calibration can be performed in each operating mode, bandit is Unnecessary to calibrate:in sate hand. The calibration range is £ 3.26 kHz in 10:Hz step: CAUTION: Your has been thoroughly adjusted and checked at the factory -before being shipped.
W RIT adjustment MAINTENANCE AND ADJUSTMENT B When the RIT control canter position (RIT = =0} s shifted; it can:be adjusted: blithe: internal:variable resistance. 1) Remove: the: top: cover and turn: power ON: [RIT] control {o the reciter position and turn OFE the BIT function 1E it I8 muted ON. 3) Receive: & standard frequency: station: such-as Wy, 4y Bash the [RIT] switch oi turn the RIT function ON Adjust R70 on the PLL unit as showiness the figure At left 10 e same tone Pen as that received.
Bl / OPTIONS INSTALLATION B UL-7 ANM+FM unit o the I-728) This unit provides AM transmitting and EM transit ting/receiving capabilities for the 10728 1} Remove: the bottom: cover: 2) Properly insert the 10:pin plug on the Uk7 1o U20 on the main: unit; 3) Connect the two i plugs from the Uk 19021 and 22 on the main unit respectively. the supplied Brown wire between U5 on the front unit and J3 neither U7, 5) Form a wire shames using the supplied wire tie.
OPTIONS INSTALLATION 7 B FL-100 or FL-101 CW narrow filter The FL100 and filters provide Cw Narrow: mode retention: 1) Remove the baton cover. 2y Insert:the filter at the proper position:: The Coca: isolation shown in the: figure at ief. *The filter:works regardless of which direction it s in: rested in: 8} Replace the cover: FL100.
B 10 specifications 49 M GENERAL *Frequency coverage: Receive 500 KHz =30 MHz B0:Mbz + 84 MHz 46729 pity) Transmit B0 = 1. 99899 MKz MHZ Z000=: 2,300 MHZ 10100~ 10150 MHz 14.000= 14350 MHz 1806818168 i MH2 271,000~ 21.450: 1 MHz 24,890~ 24990 MHz 28000 1 M2 only) *Mode: 208 CREAMY EM® “An optional U7 is required for the 10728, *Number of mandatory 26 channels antennae impedance.: 50.£) nominal *Usable temperature =090 5 £ 80907 tangs TAFT L 4 140°F #Frequency stability. » Less than %200 Hz from 1 min.
