[[The next time someone challenges me on why I only use BNC and Type N 
connectors, I’m going to send them this entire discussion.]]

Unfortunately this is not perfect either.  If you use an "N" connector on long 
runs of heliax in a cold climate, you must be aware that the coefficients of 
expansion of the center conductor and the shield can be different... and on 
several occasions, I have seen the center pin pull back from the connector (and 
essentially disconnect) because the center conductor contracted more than the 
shield.  Nb. This does not happen with all "N" connectors.  This is less of a 
problem with BNC connectors because the coax used is generally has a somewhat 
flexible shield.




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