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

Size in Millimeters

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