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There is yet another means to find out if the watt meter you are using is correct.

Excerpt from:
Dummy Load Construction

Which - BTW - is more accurate than a Bird 43P (5%).
Easy to understand how he derived this solution - and the math is very easy to grip too.

So anyone that wants to modify their cantenna can - with the use of a DMM - can get a reasonably accurate figure of their radio output and can at the same time gauge their own watt meter's accuracy. Of course, your DMM will also need to be reasonably accurate too, and a Fluke 87 will cost about $300. But for that much money, you can buy a used LP100 if you are fortunate enough to find a decent used one.

[QUOTE="Robb, post: 486901, member: 8446"] There is yet another means to find out if the watt meter you are using is correct. Excerpt from: [url=http://www.k4eaa.com/dummy.html]Dummy Load Construction[/url] Which - BTW - is more accurate than a Bird 43P (5%). Easy to understand how he derived this solution - and the math is very easy to grip too. So anyone that wants to modify their cantenna can - with the use of a DMM - can get a reasonably accurate figure of their radio output and can at the same time gauge their own watt meter's accuracy. Of course, your DMM will also need to be reasonably accurate too, and a Fluke 87 will cost about $300. But for that much money, you can buy a used LP100 if you are fortunate enough to find a decent used one. [/QUOTE]

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