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Brian Ono

best cable for fm aerial

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Just curious if co ax (75 ohm) is the best cable from my aerial to my tuner

Thanks in advance:)

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Whilst 75 ohm cable will be good, you have not informed anything about your antenna. Broadcast transmission is at 50 ohms, and many antenna are designed to that impedance rather than 75 ohm. If you were using a Discone antenna, it is a 50 ohm type and for instance you would use RG58 for short lengths, or long lengths Belden 9913 or its cheaper cousin RG213 - these are RG8 type cables which can assist in lower loss per metre but not very domestic friendly.


You may ask what is the difference between 75 ohm and 50 ohm coax ? the difference is the distance between the inner conductor to the outer shield, a 50 ohm is slightly closer


Aside from radio reception RG58 is an excellent cable, although a little awkward for audio use. RG174 also 50 ohm represents a good choice for all round audio use.


Cheers / Chris

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