From Newsgroup: rec.radio.amateur.antenna


IW5EDI Simone - Ham-Radio

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I5MZY 13 Element Yagi for 2 Meters Band

Posted: 12 Feb 2022 01:30 PM PST http://www.iw5edi.com/ham-radio/5385/i5mzy-13-element-yagi-for-2-meters-band



Massimo I5MZY present two variants of his 13 element Yagi antenna for 144 MHz.
The first is a 6 meter boom version and the second one a 7 meter boom variant.







6 Meter Boom Version



PositionLenghtDiameterR010088DE28591012*D14509528D28259088D310408928D415908888D518708888D625558568D732308488D836408368D944258688D1053058788D1160009108Size
in
Millimeters



Folded Dipole









Distance between arms 50mm
shorten the arms 40mm on each side to insert a 10mm bent tube in order to allow fine tuning of the SWR.



Element isolators are 60mm high from the boom.For other boom heights the length should be recalculated.the dipole should be fed with a balun, half wave lenght multplied cables velocity factor, as in the photo
























































7 Meter Boom Version



PositionLenghtDiameterR0100010DE53095012*D167595610D2108092010D313858728D418509168D525508568D629158568D735958768D844688848D953788768D1062538788D1170308868Size
in
Millimeters






































Donwload NEC FILES



13Elements-7m.NECDownload



13Elements-6m.NECDownload



I5MZY 13 Elements Yagi Antenna for 144 MHz



I5MZY Massimo
Massimo is an avid VHF UHF Contester, and loves antenna homebrewing. You
can contact him via his qrz.com page






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