Icom Ic-A4 Vhf Air Band Transceiver Instruction Manual
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17 10 SPECIFICATIONS DGeneral•Frequency coverage : TX 118 to 136.975 MHz RX 108 to 136.975 MHz •Mode : AM (6K00A3E) •Number of memory channels : 19 •Acceptable power supply : 9.6 V DC nominal (negative ground) (authorized battery packs) •Usable temp. range : –10˚C to +50˚C •Frequency stability : ±10 ppm (0˚C to +50˚C) •Current drain : Tx 1.2 A (CW) max. 0.7 A (CW) typical Rx 55 mA typical (at stand by) 250 mA max. (at AF max.) •Antenna impedance : 50 Ω(nominal) •Dimensions : 58(W)✕140.5(H)✕32.3(D) mm (projections not incl.) •Weight (with BP-195) : 425 g DTransmitter•Output power : 3.7 W (PEP) typical 1.0 W (CW) typical •Modulation : Low level modulation •Modulation limiting : 80 to 100 % •Audio harmonic distortion : Less than 10 % (at 60 % modulation) •Hum and noise ratio : More than 35 dB •Spurious emissions : More than 60 dBDReceiver•Receive system : Double conversion superheterodyne •Intermediate frequencies : 1st 28.95 MHz 2nd 450 kHz •Sensitivity (with 50 Ωload) : 1 µV (at AM 6dB S/N) •Squelch sensitivity : 1 µV (with 50 Ωload) •Selectivity : 8 kHz (at 6 dB) 25 kHz (at 60 dB) •Spurious response : More than 60 dB •Audio output power : 500 mW (at 10% distortion (at 9.6 V DC) with an 8 Ωload) •Noise and hum : More than 25 dB •External SP connector : 3-conductor 3.5 (d) mm/8 Ω All stated specifications are subject to change without notice or obligation. IC-A4#01 IM 01.12.5 5:14 PM Page 17 (1,1)
18 11 OPTIONS DBattery packs1Operating periods are calibrated for the following conditions: at 25°C (77°F), Tx (high power) : Rx : standby = 5 : 5 : 90 *2When Ni-Cd batteries are installed.DOther optionsBC-110A/D/V WALL CHARGER Used for regular charging of the connected battery pack. BC-119 DESKTOP CHARGER + AD-81 CHARGER ADAPTOR For rapid charging of battery packs. An AC adapter is sup- plied with the charger. Some BC-119 versions require the AD- 75 additionally. Charging time: 1.5 to 2 hrs. BC-121 MULTI-CHARGER + AD-81 CHARGER ADAPTOR For rapid charging up to 6 battery packs simultaneously. An AC adapter may be supplied depending on version. Six AD- 81’s are necessary. Charging time: 1.5 to 2 hrs.OPC-254L DC POWER CABLE CP-12L CIGARETTE LIGHTER CABLE WITH NOISE FILTER Allows you to charge a battery pack connected to the trans- ceiver via a DC power source (12–16 V DC) For charging ONLY—the transceiver cannot be simultaneously operated. HM-119 SPEAKER MICROPHONE Combination speaker and microphone. SP-13 EARPHONE Provides clear audio in noisy environments. OPC-752 HEADSET ADAPTER When using an optional headset, such as those from the David Clark Co. via the adapter , the transceiver outputs your transmitted voice to the headset for monitoring. (p. 19) EX-2119 FIELD PROGRAMMING SOFTWARE Provides quick and easy programming of items, including pri- vate channels, scan settings, etc., via an IBM ®compatible PC to transceiver. OPC-474 CLONING CABLE Cloning cable for transceiver to transceiver.OPC-478 CLONING CABLE Cloning cable for PC to transceiver.IBM ®is a registered trademark of International Business Machines. y r e t t a B k c a p e g a t l o V y t i c a p a C d o i r e p g n i g r a h C g n i t a r e p O * d o i r e p1 l l a W r e g r a h c r o 9 1 1 - C B 1 2 1 - C B 1 8 - D A h t i w 4 9 1 - P BA A r o f e s a c y r e t t a B ) 6 R (×r o e n i l a k l a 8 s l l e c d C - i N* s r h 0 1 2 A / N*s r h 6 2 5 9 1 - P BV 6 . 9hA m 0 0 7sr h 0 1sr h 5 . 1sr h 66 9 1 - P BV 6 . 90 5 0 1 h A ms r h 5 1sr h 0 . 2sr h 0 . 9 IC-A4#01 IM 01.12.5 5:14 PM Page 18 (1,1)
OPTIONS 19 11 DOPC-752( HEADSET ADAPTER) connection When using an optional headset, such as those from the David Clark Co. via the adapter , the transceiver outputs your transmitted voice to the headset for monitoring. (pgs. 6, 11) PTT switch Use a PTT switch with a 3.5 mm diame- ter plug, if required.HEADSET (Must be purchased separately.) Clip the cable to the handstrap loop on the beltclip for sup- port. OPC-752 IC-A4 PTT IC-A4#01 IM 01.12.5 5:14 PM Page 19 (1,1)
Count on us! 6-9-16 Kamihigashi, Hirano-ku, Osaka 547 Japan A-5490H-1US Printed in Japan Copyright 1997 Icom Inc. IC-A4#01 IM 01.12.5 5:38 PM Page 21 (1,1)