>Not knowing the innards of the Cantenna, may I suggest a quick test for
>the usefulness of simply a bigger can of oil. The test would be to see
>if the sides of the existing Cantenna are warm after the "10 or 20
>seconds" at 2KW claimed to be the maximum before VSWR change. If the
>outside of the can isn't warmer than before the test started, then a
>bigger can filled with more liquid will not help.
>It would seem that
>one would have to get the oil circulating around the resistor better to
>justify a larger reservoir. My guess is the can surface will NOT be any
>Is it true that the Cantenna's VSWR changes appreciably after 10 to 20
>seconds of 2KW?
Pretty much, Mike, and the change seems to be permanent. Typically R
increases roughly 50% unless the resistor cracks. However, if one needs
a 75 ohm termination, why not?
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
FAQ on WWW: http://www.contesting.com/ampfaq.html
Administrative requests: amps-REQUEST@contesting.com