yangi 50 mhz from YU7EF 5el.

EF0605A	RE	DE	D1	D2	D3
SPACINGS	0	825	1.345	2.980	4.500
3/8" (9.52 mm)	2.954	2.912	2.756	2.716	2.658
10mm	2.952	2.908	2.753	2.712	2.657
12 mm	2.950	2.906	2.744	2.702	2.644
1/2" (12.7 mm)	2.949	2.904	2.741	2.698	2.640
15 mm	2.946	2.900	2.732	2.688	2.630
5/8" (15.87 mm)	2.944	2.899	2.728	2.684	2.624
20 mm	2.938	2.892	2.715	2.667	2.610
OPTIMALLY DESIGNED 6m YAGI FOR GOOD GAIN AND F/B

http://www.yu7ef.com/