Length: 79 cm/31 in. Diameter: 7.5 cm/3 in.
Recommended power: 152 volts (250 watts)
Max power: 190 volts
Verdict: Very powerful, long range. Very large. Most expensive option. Requires more cooling and power. Consider the ST instead, unless you really need the longest range possible. US$ 535.
Note: the way the LC31 link coupler is mounted in the picture above is not recommended, due to insufficient air flow through the coupler. A fan is required to blow air through the coupler. This is explained later.