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Amateur Radio Antennas - For discussion of all amateur band designed antennas and related accoutrements. This includes base, handheld, mobile and repeater usage. For commercial antennas on the amateur bands please use Commercial Radio Antennas below.

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Old 12-08-2018, 9:41 AM
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Question How to make magnetic loop antenna

Hi
Anyone know what circumference would be using soft copper tube to make 20 meter magnetic loop antenna.
What other parts need to make a 20 meter magnetic loop antenna.
Thank for your help .
mrel
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Old 12-08-2018, 4:02 PM
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Quote:
Originally Posted by mrel View Post
Hi
Anyone know what circumference would be using soft copper tube to make 20 meter magnetic loop antenna.
What other parts need to make a 20 meter magnetic loop antenna.
Thank for your help .
mrel

DIY 20m loop antenna

https://www.google.com/search?q=buil...nt=firefox-b-1
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Old 12-08-2018, 10:29 PM
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Try this (pdf): http://www.cvarc.org/resources/Tech_...op_antenna.pdf
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Old 12-08-2018, 10:41 PM
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Why the expense and weight of copper tube? I use RG8 on a cross with the pickup loop at the top and the capacitor at the bottom - much easier to use - receiving only but it works well. If you wanted to make it really posh you could fit PL259's on each end, SO239 sockets on a box and the tuning cap inside the box - room for an amp if you felt like it. Just the braid outer of course but I'm contemplating the same principle to make a screened loop with the braid as the screen and the centre as the tuned section.
It's a diamond shape 40inches across from corner to corner.
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