The SG-239 ushers in a renaissance of HF communications, as it will work with any transceiver to provide long distance communications across borders and continents. By using the SG-239 antenna coupler, anyone can achieve great results with a longwire antenna or a coaxial fed multi resonant antenna at the window of a condo in a big city or the small roof of a house. The possibilities are unlimited!

The new SG-239 fits the coupler requirement of the many low cost HF transceivers on the market, including among others, Scout, Yaesu FT-817, Kenwood TS-50, Icom IC-706, and the K2 kit. Of course, the SG-239 is ideal with the legendary SG-2020 transmitter.                                                                     

Performance features of the SG-239 are far ahead of its low price tag. The unit will work with silent receiver tuning or within the range of 1.5 to 200 watts with a high power transceiver. It has 170 memory bins, with fast, accurate tuning via independent sensors, including VSWR, phase, magnitude, low impedance, and forward sensing. Other couplers only sense the VSWR for a proper match – the SG-239 does it all and does it fast. And, if you recall the tuning setting from memory, tuning is even faster.

The SG-239 utilizes the respected technology of the very popular SGC Smartuners. This new low cost and high performance product will offer radio amateurs an opportunity to achieve increased levels of operation with any HF equipment.

HF Frequency Range: 1.8-30 MHz Power Input Range: 1.5-200 watts (PEP)
Or CW duty cycle 40% Number of channels: unlimited Revolving memory bins: 165 TX; 5 RX Input Impedance Range: .2-5000 ohms VSWR: (Typical) Typically less than 2:1 DC Input Requirement: +13.8 VDC (nominal) DC Operating Range: +10 to 18.5 VDC Input Current: Average: 230 milliamps Random set time: Typical: less than 2 seconds Recurrent set time: Typical: less than 10 milliseconds Antenna Length: Minimum length of 9 ft. - 7 to 30 MHz @ 100W
Minimum length of 40 ft. - 3 to 30 MHz @ 200W
Minimum length of 100 ft. - 1.8-30 MHz @ 100W Installation: Any position Operating Temperature: -35° to +70°C Size: 7.5”L x 6”W x 1.85”H (19cm x 15cm x 4.5cm) Weight: 2 pounds Case Construction: Iridited aluminum case Control Cable (not supplied):

Standard coaxial and 2 wires for DC plus 2 wires of a optional SmartLock gauge 14-18

Antenna types:
1. Whip
2. Backstay (marine, sail) 
3. Dipole centerfed
4. Dipole with feedline
5. Loop (small) 2x2 multi turn
6. Loop (large) 10 ft. and up single turn 
7. Longwire
8. Ladder feed