Correct. My work with JPL on the DSN showed me how much they like TNC's. Everywhere!
However, PROPERLY made BNC last az long time. I have several cubic feet of BNC RG-223 cables gifted me from NSA, and they are VERY good! Connectors do not "twist off" or "distort". You get what you pay for!? J. Kruth
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In a message dated 3/24/2024 10:01:45 AM Eastern Standard Time, Adrian@... writes:
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That may be true for 50 Ohm but do not try it with the 75 Ohm versions!
BNC/TNC have the same inner pin dimensions and 'fix' the impedance by
changing the dielectric insert dimensions in the mating area but 'N'
type have a different diameter centre contact!
We found the other issue with BNC at higher frequencies is that, again
possibly due to the method of retention, they seem to fall off much
faster over time with use, the inner contact sleeves seemed to get
worn/distorted more. Perhaps due to more 'brute force' being used to
overcome misalignment during connection but the TNCs seemed to survive
much better 'in the field'. This last, in the case of Radio Astronomy,
was both a figurative and literal term!
On 24/03/2024 13:36, Jeff Kruth via groups.io wrote:
> To me this is an interesting comment. I do not believe that the
> connector design is limiting in this way. TNC, BNC and type N all
> share a common coaxial design for the inner portion where the RF goes.
> You can plug a type N male into a BNC female and they mate properly,
> there is simply no mechanical retention.
