In previous discussions about test equipment, I mentioned multimeters and dummy loads. However, there are several other pieces of test equipment that I have yet to mention. One of these items is a wattmeter.

A wattmeter is a very important piece of test equipment when dealing with anything having to do with radios. A wattmeter is connected to the coax in-line between the radio and antenna.

Some things that a wattmeter can be used for include measuring the power output from the radio (to make sure that it is outputting as much power as it should be) as well as testing the coax and antenna to make sure that they are working properly. By measuring both forward and reflected power, you can be sure that the antenna is effective for a given frequency as well as that there are no problems with the coax.

Also, if your transmissions are not being heard or if the range is not as good as you think it should be, you can use a wattmeter to determine whether the problem is in the radio or the antenna.

As far as what kind of wattmeter go get, the most recognizable brand and the one with probably the best reputation for accuracy and durability would be Bird. However, I have a Diamond brand wattmeter that seems to be quite precise and versatile. As with the other test equipment that has been discussed, having any at all (even if it’s of lesser quality or has less features) is better than not having one.

While a multimeter is a very important and versatile tool when dealing with anything electronic, the wattmeter fills a similar purpose when dealing with the RF side of things.