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2021 Pojects ![]() |
QO-100 ![]() |
Helix antenna mechanical ![]() |
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2021 |
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22mm![]() Drilling exact 22mm hole for the LNB |
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Chaparral A seperate inlay is made from a bronze bearing using the lathe. |
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Finishing After choosing the 7/15 chasis adapter, the desired position is marked onto the reflector. |
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Fitting |
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Helix where s is the spacing from turn to turn and D is the diameter, the circumference divided by π. |
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16mm![]() Typical helix dimensions for an axial-mode helical antenna have a helix circumference of one wavelength at the center frequency, with a helix pitch of 12 to 14 degrees.The ground plane diameter is typically 0.94λ diameter using 16mm2 solid copper wire which is bend using very careful turning the lathe. |
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Socket Drilling @ 12 degrees 9mm holes at 28mm distance. |
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Impedance matching
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