![]() But the calculator suggests that it indeed works. The total length of the can would need to be 124mm, which is indeed less than the available 876mm of height of a "Standard Drum." My familiarity with this antenna design is not strong enough to suggest if one MUST cut it to that length. So, on to an online calculator, Let's do some trial and error and see what happens:Īssuming a "Standard Drum" with a diameter of 572 millimetres and a goal frequency of 144Mhz, we would mount our whip 31mm from the back of the can, to the side through a simple hole. Man, I would swear I saw an article once about building a cantenna out of a 55 gallon drum, but my Google-fu isn't producing an article.īut some back-of-the-napkin math suggests that a quarter wave whip will fit inside a 55 gallon drum.
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