There is good reason why power ratings are not stated. Ratings vary by frequency and particularly by VSWR. Using a tuner may improve the load seen by the rig but will also increase losses on the antenna side of the tuner. Skin effect means only the outer 1% of the conductor is passing current. I would think twice about running more than 100 watts at HF or 50 watts at VHF and above through a BNC connector, never mind the coax.
73, Fred, AE6QL -----Original Message----- >From: Walter Underwood <[email protected]> >Sent: Oct 9, 2014 8:50 AM >To: "[email protected]" <[email protected]> >Subject: Re: [Elecraft] BNC connectors for RG-8X Coax > >BNC power handling is similar to UHF connectors. BNC connectors are rated for >500V, same as UHF connectors. Amphenol does not specify contact resistance for >UHF connectors. The full BNC specs are here: > >http://www.amphenolrf.com/products/CatalogPages/BNC.pdf > >wunder >K6WRU >CM87wj >http://observer.wunderwood.org/ > >On Oct 9, 2014, at 8:34 AM, WILLIS COOKE via Elecraft ><[email protected]> wrote: > >> I don't think you will have trouble with legal power. I regularly run 1 KW >> through RG8X without problems. I did have some trouble running over about >> 400 watts with a Carolina Windom running RG8X but I don't know what was >> shorting, the coax or the chokes or balun. RG8X is the same outer diameter >> as RG-79 so the RG-79 BNC will fit. The impedance bump is so short that you >> will not notice it at 6 meters or below. If you are trying to run >> microwave, you might have trouble buy the pin and socket are the same for >> the RG-58 and RG-59 connectors. The insulation thickness is what makes RG-8X >> have a higher rating than RG-58. >> >> Willis 'Cookie' Cooke, TDXS DX Chairman >> K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart >> >> >> On Thursday, October 9, 2014 8:01 AM, David Cole <[email protected]> wrote: >> >> >> >> Hi, >> Looking at the tech spec sheet I don't see a power rating? Also >> remember these are 75 ohm connectors... Anyone know what the max power >> you can pump through one of these are?-- Thanks and 73's,For equipment, and >> software setups and reviews see:www.nk7z.netfor MixW support >> see;http://groups.yahoo.com/neo/groups/mixw/infofor Dopplergram information >> see:http://groups.yahoo.com/neo/groups/dopplergram/infofor MM-SSTV >> see:http://groups.yahoo.com/neo/groups/MM-SSTV/infoOn Thu, 2014-10-09 at >> 04:59 -0700, Dennis Griffin wrote:> Sorry, here is a source for a connector >> similar to what I believe you are seeking, Phil, except that it's for >> LMR-200. The Tessco & TimesMicrowave sites also have good connector, and >> coax, info.> > >> http://www.newark.com/amphenol-connex/112597/rf-coaxial-bnc-plug-str-50-ohm/dp/99H4490?ost=99H4490> >> > 73 de Dennis KD7CAC> Scottsdale, AZ> > On Oct 9, 2014, at 4:17 AM, Dennis >> Griffin <[email protected]> wrote:> > > I have ordered several >> jumper/adapter cables made with RG174 from WiFi RF Expert. They have been >> good quality. An example is a 24" RG174 BNC Male 90° to UHF >> Female for $12.29. He can custom make most anything an OM might want. RF >> Parts is a source for various RF connectors & inline adapters.> > > > 73 de >> Dennis KD7CAC> > Scottsdale, AZ> > > > On Oct 9, 2014, at 3:38 AM, Joel >> Black <[email protected]> wrote:> > > >> Phil,> >> > >> When I need one, I >> have been using the RF Industries RFB-1101-1P. These are solder-pin / clamp >> connectors. I don't remember from where they were purchased.> >> > >> I >> don't remember what put me on these. I use them indoors only from my KX3 to >> an antenna switch and from the RX connector on my K3 to an antenna switch. I >> also have a 25' piece of RG-8x with a PL-259 on one end and the BNC on the >> other for when I go to the park and operate. I have not had any failures >> with them; your mileage may vary. :)> >> > >> 73,> >> Joel - W4JBB> >> > >> >> On 10/9/14, 12:18 AM, Phil Hystad wrote:> >>> I am looking to use BNC (male) >> connectors for RG-8X cable. I have found a number of crimp style >> connectors but I am wondering if there are any other kind to consider. Are >> the crimp style the best for reasonable cost?> >>> > >>> My application does >> not need to be weather protective -- all use indoors.> >>> > >>> Thanks,> >> >>> > >>> 73, phil, K7PEH> >> ______________________________________________________________> 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] >> ______________________________________________________________ >> 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] ______________________________________________________________ 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]
