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565rffeedback [2021/07/17 17:56] pa1ap [Before and after experience] |
565rffeedback [2021/07/17 17:58] (current) pa1ap [My take away’s are:] |
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| 3.1- A coax fed dipole with a current balun at the center will force balance between the two legs of the dipole. The effect of the current balun will be a significant common mode rejection and hence small (if any) resulting RF at the opposite side of the coax. Until the dipole is used on other than designed frequencies. | 3.1- A coax fed dipole with a current balun at the center will force balance between the two legs of the dipole. The effect of the current balun will be a significant common mode rejection and hence small (if any) resulting RF at the opposite side of the coax. Until the dipole is used on other than designed frequencies. | ||
| - | 3.2- A balanced open feedline has low loss and great advantages being able to be used on other than designed frequencies. However it assumes a balanced dipole which is only theory. More likely you have an unbalanced system resulting in resulting RF at the other end of the balanced feedline but now with only small loss. In a way this great advantage has also great disadvantages. | + | 3.2- A balanced open feedline has low loss and great advantages being able to be used on other than designed frequencies. However it assumes a balanced dipole which is only theory. More likely you have an unbalanced system resulting in RF at the other end of the balanced feedline but now with only small loss. In a way this great advantage has also great disadvantages. |
| 4- Always ensure resulting RF at the transmitter can travel somewhere else than your microphone cable, headphone cable and such like. Ensure the path for resulting RF has a very low impedance compared to all your other cables. | 4- Always ensure resulting RF at the transmitter can travel somewhere else than your microphone cable, headphone cable and such like. Ensure the path for resulting RF has a very low impedance compared to all your other cables. | ||
