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

	Position	Lenght	Diameter
R	0	1008	8
DE	285	910	12*
D1	450	952	8
D2	825	908	8
D3	1040	892	8
D4	1590	888	8
D5	1870	888	8
D6	2555	856	8
D7	3230	848	8
D8	3640	836	8
D9	4425	868	8
D10	5305	878	8
D11	6000	910	8

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 cable’s velocity factor, as in the photo

7 Meter Boom Version

	Position	Lenght	Diameter
R	0	1000	10
DE	530	950	12*
D1	675	956	10
D2	1080	920	10
D3	1385	872	8
D4	1850	916	8
D5	2550	856	8
D6	2915	856	8
D7	3595	876	8
D8	4468	884	8
D9	5378	876	8
D10	6253	878	8
D11	7030	886	8

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