G0KSC SC0606L 6el 50Mhz Yagi Antenna with a 6.75 Metre Length Boom

This a long boom 6el Yagi for 50Mhz. It has a boom which is made from a 2 joined pieces 1.25 inch square tube section. No boom support will be required.

Fabio IZ3GFZ built the SC0606L for 50MHz

Dimensions in Metres

Element spacing:

• Ref =      0
• Driven =  .939
• D1 =      1.448
• D2 =      3.007
• D3 =      5.16
• D4 =      6.75

Element sizes per element half:

• Ref =       1.468
• Driven =   1.448
• D1 =        1.371
• D2 =        1.334
• D3 =        1.329
• D4 =        1.307

Performance figures @ 50.250Mhz:

• Froward Gain: 11.94dBi free space
• Front to Back: 25.7dB
• Radiation angle at 10 Metres above ground: 10 degrees

Element diameter:

Each element is made out of single piece 1/2 inch (12.7mm) aluminum tubing Each element half length needs to be doubled in order to gain your total element size. No difference is length needs to be calculated for the 1.25 inch boom as the elements sit high enough above the boom for the boom to have no influence.

NOTE:

You can build this antenna with 13mm diameter tubing using the same parameters above. Slightly higher front to back ratio and forward gain will be seen along with a narrower SWR curve.

For construction information see 'G0KSC insulators' and the UKSMG article from the main menu on the home page.