phono for rf

[Multi-Volti Devices]

This topic has probably been discussed before, but I was told by the late
RCA engineer who got me interested in engineering that the RCA/phono jack is
a constant impedance 50 ohm connector (or perhaps close to 50, don't
remember his exact words, and at least for hf), and that is why Collins used
it on hf gear and type N connectors for higher freqs. Can't remember if he
called it a balanced connector, but he did call UHF connectors unbalanced.
Not sure if that's because one conductor is grounded, because N and BNC
would be unbalanced by same logic...guess that's why you use open wire
feeders and feedthrus...

Murray

UHF (PL-259, SO-239), are unbalanced and

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