Specifications

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4.4 SG-237 Smartuner HF Antenna Coupler In-
stallation
Read the SG-237 manual, which is included, as it provides detailed
information which can be helpful to your installation.
The coaxial connector at the end of the coupler cable can then be se-
curely attached to the radio equipment.
The red wire should be attached to a +12 volt power source and the
black wire to ground.
4.5 Tips, Do’s and Don’ts
• Do not coil any cables, even those which are not part of the an-
tenna. Doing so can make them susceptible to the signal radiated
by the antenna and could impact the performance of the antenna
and the radio system.
• If an “RF Burn” - it feels like a sting - is experienced by touching
the radio while transmitting, eliminate potential RF by grounding
the radio by attaching one or more 15 to 40 foot wires (not sup-
plied) to the ground terminal of the radio.
• When shaping the wire for a multi-turn antenna, it will be much
easier to accomplish if you can get another person to help. Form
the loops, them alternate shaking and gently pulling the wire until
all of the loops are the same length.
• To verify that the antenna is radiating a signal, any 5 to 100 Watt
fluorescent light tube can be used. By moving the bulb around the
perimeter of the antenna you will find spots where the bulb lights
up indicating the presence of radiated RF power. Intensity of light
increases with power in the antenna and on lower frequencies.
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