Smartuner Feature & Application Chart All SGC couplers work with any HF radio. All couplers require RF and 12 volt lines only.   Applications SG-230 SG-230PRO SG-235 SG-231 SG-237 SG-237Porta SGC Catalog Number 54-12 54-16 54-15 54-17 54-18 54-20 Power Input Range  (PEP watts) 3-200 3-200 3-500 3-100 3-100 3-100 HF Frequency Range 1.6-30 Mhz 1.6-30  Mhz 1.8-30 Mhz 1-60  Mhz 1.8-60 Mhz 1.8-60  Mhz Total combinations  of elements half million half million half million four million half million half million Our Price (US $) CALL CALL CALL CALL CALL CALL The table above is a suggested reference for optimum client selection.  However, best suitability may differ depending on operator's application. SGC Smartuner Family Specifications Chart All SGC couplers will work with any HF Radio. All SGC couplers require RF and 12 volt lines only for operation. All SGC couplers have the SmartLock Pro option. SG-230 PRO only has SmartLock Pro included as standard.  Description SG-230 SG-230PRO SG-235 SG-231 SG-237 HF Frequency Range 1.6 - 30MHz 1.6 - 30MHz 1.8 - 30MHz 1 - 60MHz 1.8 - 60MHz Power Input Range (PEP watts) 3-200 3-200 3-500 3-100 3-100 Continuous CW Power (watts) 80 80 200 60 40 Input Impedance Range (ohms) 45-55 45-55 45-55 45-55 45-55 VSWR (Typical) <2:1 <1.4:1 <1.4:1 <1.4:1 <2:1 DC Input Requirement (VDC) Nominal 13.6 13.6 13.6 13.6 13.6 DC Operating Range (VDC) 10 to 18 10 to 18 10 to 18 10 to 18 10 to 18 Input Current (average amps) 0.9 0.9 1.4 0.5 0.3 Random Set Times (seconds) <2 <2 <2 <4 <4 Recurrent Set Times(millisec) <10 <10 <10 <10 <10 Non-Volatile Memory Addresses 500 170 170 170 170 Total combinations using all elements half million half million half million four million half million Antenna Length operating higher than 3.3 MHz 8 feet min. 8 feet min. 23 feet min. 8 feet min. 8 feet min. Antenna Length operating from the lowest frequency to 3.3 MHz 23 feet min. 23 feet min. 150 feet min. 23 feet min. 28 feet min. Elements configuration Pi & L Pi & L Pi & L Pi & L Pi & L Input Capacitance minimum 100pf  100pf 100pf  50pf  50pf  Input Capacitance maximum 6400pf 6400pf 6400pf  6400pf  6400pf  Inductance minimum 0.25µH  0.25µH 0.125µH  0.125µH  0.125µH Inductance maximum 64µH  64µH  32µH  64µH  32µH  Output Capacitance minimum 25pf  25pf  12.5pf  12.5pf  12.5pf  Output Capacitance maximum 800pf 800pf  400pf 400pf  200pf  Installation Any position Any position Any position Any position Any position Operating Temperature (Celsius) -35C to +70C -35C to +70C -35C to +70C -35C to +70C -35C to +70C Environmental Waterproof at immersion of two feet, half hour Waterproof at immersion of two feet, half hour Waterproof at immersion of two feet, half hour Waterproof at immersion of two feet, half hour Waterproof at immersion of two feet, half hour Size Overall (inches) 16Dx12Wx3H 16Dx12Wx3H 16Dx12Wx3H 11.5Dx9.5Wx1.7H 6Dx7Wx1.5H (5.5x6x1.7 PCB Only) Size Overall (centimeters) 40.6Dx 30.5Wx7.6H 40.6Dx 30.5Wx7.6H 40.6Dx 30.5Wx7.6H 29.2Dx 24.1Wx4.32H 22.9Dx17.8Wx3.8H Weight (pounds) 8 8 8 3.8 <2  Weight (kilos) 3.5 3.5 3.5 1.6 <0.75 Case Construction Plastic ABS Waterproof case Plastic ABS Waterproof case Plastic ABS Waterproof case Plastic ABS Waterproof case metal base Plastic ABS Waterproof case metal base Cable(s) (NOTE: All couplers require RF and 12 volt lines only. SGC cables are required for additional features only.) SGC cable, 9 feet coaxial and two power wire input, and RMT tune and SmartLock wire SGC cable, 9 feet coaxial and 12 conductor wires. SGC cable, 9 feet coaxial and two power wire input, and RMT tune and SmartLock wire. 10 feet RG-58 power cable, 10 feet RG-58 coax cable with PL259 connectors SGC cable, 9 feet coaxial and two power wire input, and RMT tune and SmartLock wire.