A transmitter is only as good as the antenna it is connected to. N connectors on the VHF/UHF side.You can have the biggest and the best FM transmitter in the world, but if the power doesn't get from it to the antenna you may as well turn it off. This lets you connect your HF and VHF/UHF transceivers at the same time.Digital SWR & Watt meter - only version with N connectors on the VHF/UHF side. It features separate HF and VHF/UHF directional couplers, each with its own SO-239 connectors. MFJ-864 Cross-Needle Meter reads forward and reflected power and SWR simultaneously at a single glance. This new MFJ Cross Needle SWR/Wattmeter covers HF thru VHF 1.8 - 60MHz.

SWR meters have a switch on them usually labeled up as FWD and REF. This connects in line between the transmitter and the antenna and antenna cable. All serious radio stations should have one of these. Color/Brightness adjustment for each Meter Voltage: 13.8 VDC +/-15 Current Draw: 500 mA MaxA useful piece of test equipment that measures SWR is an SWR meter.

The SWR meter is then set to REF position, the reading shown on the meter is the amount of reflected power relative to the forward power. To make an SWR reading the transmitter is switched on, the meter is set to FWD position and the CAL control is turned to make the meter needle point to 100%. In the REF position the meter indicates the reflected power traveling on the antenna cable, this is the power that has not been absorbed by the antenna returning back to the transmitter.

Swr Power Meter