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Building and measuring baluns (Part II). Another approach 1 core instead of 2.
Updated: Oct 22, 2020
Return loss measurement:

Left: FT 240-43 Right: FT140-43


Insertion loss measurement:



The measured loss is for two devices. Divide the result by two, to see the loss value of one device.
0,10 dB means that you have a power loss of 2,3 %.