Standard version
Catalog Number: 54-18

cat. #54-18
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For marine, aviation, commercial and radio amateur applications.

  1. Whip
  2. Backstay (marine, sail)
  3. Dipole centerfed
  4. Dipole with feedline
  5. Loop (small) 2 x 2 ft. multi-turn
  6. Loop (large) 10 ft. and up single turn
  7. Longwire
This product is designed with high density surface mount components on a 4 layer PCB, providing high efficiency, reliability and performance. The unit is fully waterproof (under 2 ft of water over 24 hour period). 

The PCB is mounted on a sturdy chassis plate which provides an excellent electrical and RF ground system. The case is waterproof and protects the complete unit.

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Specifications - SG-237

HF Frequency Range: 1.8 to 60 MHz
Power Input Range: 3 to 100 watts (PEP)   40 watts max. on CW
Input Impedance Range: 45 to 55 ohms
VSWR: (Typical) Typically less than 1.4:1
DC Input Requirement: + 13.8 VDC (nominal)
DC Operating Range: +10.5 to 18 VDC
Input Current: Average: 300 milli amps
Random set time: Typical: less than 2 seconds
Recurrent set time: Typical: less than 10 milliseconds
Memory Capacity: 170 locations
Antenna Length: Minimum length of 7 ft. - 3.5 to 60 MHz 
Minimum length of 23 ft. - 1.8 to 60
Installation: Any position
Operating Temperature: -35° to +70° C
Size: 9D x 7W x 1.5H inches (22.9Dx17.8Wx3.8H cm)
PCB 5.5 x 6 x 1.7 inches
Weight: 2 pounds (PCB 1.25 pounds)
Case Construction: ABS plastic cover on an anodized aluminum base
Control Cable: Shielded 4 conductor RG-58 coax with PL-259 connector
Control Cable Length: 9 feet in length