Date: Sat, 8 Dec 2018 18:43:36 -0500 From: <[email protected]> To: <[email protected]> Cc: <[email protected]> Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259
<A BNC connector has a ?.050 pin and when mated properly an N connector has a <.120 center pin. <John KK9A ## front end of a BNC is the same diam and taper as a type N. The back end of a type N is bigger, to handle the larger center conductor of 213 U etc. ## There is NO RF flowing on the pin on any of these connectors ! The RF flows on the outside of the mating female... that the pin is inserted into. All the pin is doing, is mating the hollow female to the back end cylinder, that the center conductor terminates to. The back end portion is the same OD as the female...the 2 are butted together. Mean while the pin is buried inside, invisible..with no RF on it. ## while you may well get away with using a BNC, with small coax, like RG-400, RG-142, RG-303, and RG-59 etc, on 160m, with 1.5 kw.... I would not use the BNC on the upper bands with high power. The V stand off is not there. I would not flood the inside of a type N with dielectric grease. With 1.5 kw and high swr, etc, the V breakdown through the grease, could easily cause issues, then u get carbon tracks etc. A tiny bit of grease on the center pin..and a tiny bit on the threads is fine, and works good. Jim VE7RF _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
