I sent this a couple of days again but never seen it show up in email? Having problems getting youtube videos to run too. Terry KI7M
> ---------- Original Message ---------- > From: terry burge <[email protected]> > To: [email protected], terry burge <[email protected]> > Date: 06/04/2020 10:37 PM > Subject: Fwd: Re: Topband: Adding connectoirs to CATV Hardline > > > FYI... > > A friend provided a 4 ft. spool of 1/2" hardline 75 ohm stuff from a lot he > was cleaning up of what appeared to be Comscope coax. Size was 0.595" outside > diameter aluminum (no black covering, silver) with copper center conductor of > 0.122" best I could figure with my Harbor Freight 'Pittsburg' measuring > device. Inner shield 0.35" or so. On the internet I found a site that showed > how to use PL-259 with hardline and two sizes of brass tubing. Don't remember > the sizes but they were something like 9/16" and maybe one size down. > Required splitting an end of the brass tubing and trying to get a good fit > over the outside of the back-to-back SO-239's. > I used the double SO-259's instead of PL-259's. > > Would then use double layers of heat shrink tubing and screw down hose clamps > to give it some strength. The copper center conductor required trying to add > solder to build up it's diameter to to fit tight enough inside the SO-239's. > Tough task I can tell you. Wasn't a real strong connection so you had to be > careful especially if pulling on the connection up on the tower or on the > ground. Still it seemed to work but the jury is still out at my location. > Could not see any other way to do this than maybe using wire jumpers like > some Baluns use. > > You might look for the site and/or trying to develop something like this. > Like I said, the connection had to be used gently. 75 ohm coax to 50 ohm > connection so maybe some creative thought on that. > > Terry > KI7M > > > ---------- Original Message ---------- > > From: RT Clay <[email protected]> > > To: [email protected] > > Date: June 4, 2020 at 12:21 PM > > Subject: Re: Topband: Adding connectoirs to CATV Hardline > > > > Plumbing parts work, but the problem is that there is a lot of catv > > hardline that is an odd size. For example, I have some 0.412 inch diameter > > cable and some 0.540 inch cable. That is what motivated me to learn how to > > use pin connectors. > > > > Tor N4OGW > > > > > > > > On Thursday, June 4, 2020, 2:00:38 PM CDT, <[email protected]> wrote: > > > > > > > > > > > > Hi Guys, > > There is an article in one of the ham magazines from years ago that > > describes how to make an adapter from brass tubing compression sleve > > fittings (from auto parts store) that adapts from 1/2 inch CATV Hardline > > cable to UHF male connectors RG-8 size. Anti-oxidants required. I have been > > doing this for years with no problems at 1500 watts. There is a pair on my > > 80 meter 4-square as we speak. Its been so long that I have since forgotten > > where the article was. Perhaps an internet search would bring it up. I > > would write something up but I have my hands full at the moment with > > cleaning up after a tornado like storm with 100 MPH winds that went right > > over my house. Minimal damage except for the top 1/3 of my 160 vertical and > > lots of tall trees down in what's left of the yard. All else is fine with > > nothing I can't repair. > > Good luck. > > Lee K7TJR Culver OR > > > > > > > > Clamps do work ok with CATV hardline, but you have to be careful as it is > > very easy to crush the hardline. Also, waterproofing is always a pain. > > > > As W7WKR posted, I also adapt pin connectors, which are the standard way of > > terminating catv hardline. Here are some comments: > > > > Pin connectors have the same thread size (5/8") that is found on so-239s or > > N connectors. They are fairly cheap to buy new or can be found on ebay. One > > difficulty with pin connectors compared to many other hardline connectors > > is that it is nearly impossible to install them on catv hardline unless you > > have a coring tool of the right size to fit the hardline. This is because > > the pin connectors clamp onto the shield from both sides, so you have to > > completely remove the insulation from the hardline for 1-2" back up into > > the cable. Coring tools are > $100 new, but I have found them used for > > $20-$40. The used ones are often pretty worn out: however, with care you > > can sharpen the cutting parts with a file or stone, which makes a big > > difference. It can also be tricky to figure out how much center conductor > > you need sticking out for a given pin connector- some of the connectors > > have little tick marks on the outside that show the correct length to cut > > the center conductor. > > > > Once you have the pin connector on, then: > > > > 1. For type N: the body of a "clamp" type N connector will screw directly > > onto the pin connector (discard the smaller clamp part with male threads > > that normally goes on the RG-8). I just cut the pin to length and file the > > end down to a point. You do have to be careful that the point is not too > > wide, otherwise it might break the female contact. > > > > 2. For UHF: there are similar clamp-type UHF connectors available with the > > same 5/8 thread in the connector body. Here is one example: > > > > https://www.w5swl.com/Coax-Connector-UHF-Female-Clamp-fits-RG-8AU-RG-213-Series-Cable--by-W5SWL_p_466.html > > > > just cut the pin to the right length, solder on the center female > > connector, and screw the body on. > > > > 3. You can also just drill a hole in a metal box and attach the pin > > connector with a nut meant to go on SO239s. > > > > There are also splice connectors to join two pieces of hardline. These are > > nice because they don't require any waterproofing. There are also some that > > end in an F connector instead of a pin. > > > > Tor > > N4OGW > > > > > > > > > > > > r > > > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
