CM 6 element yagi for 144 MHz portable operating CM 12mm round elements insulated from the boom except for the mounting bolt CM 5m above ground over poor earth CM Forward gain is 16.8 dBi, main lobe is +6 degrees. CM F/B is 12 dB optimised for gain and match to 12.5 ohms CM G4HYG 29 August 2015 CE SY posDE=0 'spacing DE to D1 SY posD1=0.094881 'Spacing D1 to D2 SY posD2=0.475187 'Spacing D2 to D3 SY posD3=0.985438 SY posD4=1.466783 SY posD5=2.033862 SY height=5 'Height above ground level SY DElen=1.06 'Driven element length SY D1len=0.96 SY D2len=0.90307 SY D3len=0.843912 SY D4len=0.885738 SY D5len=0.829478 GW 2 21 posDE -DElen/2 height posDE DElen/2 height 0.012 GW 3 21 posD1 -D1len/2 height posD1 D1len/2 height 0.012 GW 4 21 posD2 -D2len/2 height posD2 D2len/2 height 0.012 GW 5 21 posD3 -D3len/2 height posD3 D2len/2 height 0.012 GW 6 21 posD4 -D4len/2 height posD4 D4len/2 height 0.012 GW 7 21 posD5 -D5len/2 height posD5 D5len/2 height 0.012 GE 1 GN 2 0 0 0 5 0.001 EK EX 0 2 11 0 1 0 0 FR 0 5 0 0 144.0 0.2 EN