Can I change the tubing diameter on a QFH antenna without having to redesign?

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Bill2k
Posts: 4
Joined: Sat Aug 29, 2020 1:58 pm

Can I change the tubing diameter on a QFH antenna without having to redesign?

Post by Bill2k » Thu Sep 10, 2020 3:28 pm

I want to make a QFH style antenna. Specifically, I want to make the one shown in this tutorial. The tubing used for this antenna is 3/8th of an inch in diameter. Could I use 1/2 inch tubing and keep the same length dimensions?

73's

VE3EAR
Posts: 42
Joined: Sat Oct 05, 2019 10:13 pm

Re: Can I change the tubing diameter on a QFH antenna without having to redesign?

Post by VE3EAR » Fri Sep 11, 2020 11:42 am

That shouldn't be a problem. The only likely effect of the larger diameter tubing will be a small increase in the bandwidth of the antenna. That could be a good thing!

73, Bruce, VE3EAR

Bill2k
Posts: 4
Joined: Sat Aug 29, 2020 1:58 pm

Re: Can I change the tubing diameter on a QFH antenna without having to redesign?

Post by Bill2k » Fri Sep 11, 2020 12:33 pm

Thats great to read. Thanks for answering. Have a great day. 73's

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