Re: QCX mini: RF output BNC or SMA #poll-notice

Per - LA9XKA

True, but Tyco Electronics also specifies only 50 cycles for their gold plated center pin BNC connectors.

73 de LA9XKA - Per

On Thu, Aug 6, 2020 at 03:39 PM, Dave wrote:
The SMA is only rated for 50 mate/demate cycles, and that is for the real gold plated versions. Quite a nice connector for applications that call for a very few disconnects, like inside equipment.
There is a reason why the BNC is found on scopes and signal generators, etc.
The TNC is a close relative of the BNC, without the vibration induced connection noise.


On Aug 6, 2020, at 09:34, Hans Summers <hans.summers@...> wrote:

Hi Russ
I have to admit to a preference for BNC. 

What kind of issues have they seen? 
73 Hans G0UPL

On Thu, Aug 6, 2020 at 4:28 PM Russ@va3rr via <> wrote:
The NanoVNA group has been seeing some issues with SMA connectors.

It's too bad TNC connectors aren't more prevalent in amateur equipment.  I have some LMR cables with TNC connectors and they really are quite robust...

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