Twin ferrite rods in radios from the '50s
Hi, i post some photos of a ferrite rod antenna that i have found; i would like to understand why it is composed of two ferrite rods that look identical and the LW and MW coils are connected in parallel (see the hand sketch i drawed).
These twin rods look quite common in old tube radios of big dimensions.
Why two rods? what is the advantage and why isn't this configuration used anymore?
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