12 CONNECTOR INFORMATION12-3KEY jackEXT-SP jackREMOTE jackALC jackSEND jackPHONES jackConnects to a CW straight key or a paddle:6.35 mm (¼ in) (d)When connecting a CW straight key.comdashdotWhen connecting a CW paddle and using the internalelectronic keyer.Connects to an external speaker:3.5 mm (⅛ in) (d)• Output impedance: 4 ~ 8 Ω• Output level: More than 2.5 W at10% distortion into an8 Ω load.EXT-SPUsed for computer control and transceiveoperation: 3.5 mm (⅛ in) (d)The optional CT-17 is required whenconnecting a PC to [REMOTE].REMOTEct-179–15 V DCPCmini-plug cableCable( RS-232Ctype)IC-7300ALC Connects to the ALC output jack of a non-Icom linear amplifier. (RCA Plug)• Control voltage: –4 ~ 0 VSEND The terminal goes low when the transceivertransmits. (RCA Plug)This terminal is used to control an externalnon-Icom linear amplifier.T/R control voltage and current must beless than 16 V DC and 0.5 A.Connects to standard stereo headphones:3.5 mm (⅛ in) (d)• Output impedance: 8 ~ 16 Ω• Output level: More than 5 mW intoan 8 Ω load.PHONESDC power socketAccepts the regulated DC powerfor 13.8 V DC ±15% through thesupplied DC power cable.RWARNING! NEVER reverse theDC power cable polarity.Rear panel view