I’m not trying to convince anyone else to use N-type connectors. I’m just happy they are available.
wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jan 23, 2018, at 11:05 AM, Jim Brown <[email protected]> wrote: > > On 1/23/2018 10:29 AM, Walter Underwood wrote: >> N connectors have better weatherproofing. > > How does that matter for connections inside a weatherproof enclosure that > mounts the arrestors? They also have the problem of cable migration from the > connector. > >> They handle 1500 V instead of 500 V. > > In 60 years of hamming, I've never seen a quality UHF connector that arced. > Of course, I've never run more than 1.5kW, and I try to use antennas that are > close to resonance. :) > >> But I mostly like them better because they are engineered instead of a >> historical accident.:-) > > The technical superiority of N-connectors for use at HF is a wild > exaggeration, to the extent of being an urban myth. Yes, there is a SMALL > impedance difference at a junction, but it simply doesn't matter at 6M and > below, both because the difference in Zo is relatively small, because the > length is small as a fraction of a wavelength, and because as frequency > increases, small mismatches are reduced by the loss in the feedline (and NOT > loss due to mismatch). > > There is, of course, a FICTIONAL loss called "mismatch loss," which shows up > in the lab with test equipment that is carefully engineered to have 50 ohm > output Z. But the output Z of real world transmitters is rarely 50 ohms -- > it's usually a lot lower. Funny -- because it isn't real, we didn't learn > about it in our transmission lines classes back in the '60s. > > What matters a lot more is the QUALITY of the connector. Smart hams don't use > el-cheapo, non-branded connectors. Except for receive antennas, I use only > soldered Amphenol 83-1SP connectors and mating Amphenol jacks and Amphenol > adapters. > > 73, Jim K9YC > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
