I would also agree with Craig. There are more possible failure points with the connections but really not loss. If there was loss the connectors would heat up which they really don't. Imagine how hot
Craig, Do you have a source for UHF connectors for LDF4-50A I was told that Andrew does not manufacture those in UHF style anymore.... Maybe my supplier was wrong, or you have a different source to p
I had therfc.com make up my cables. They have the tools, connectors and cable. Call and ask for Joel...he is a ham and knows his stuff. _______________________________________________ TenTec mailing
Davis RF has UHF connectors for 1/2" Heliax. While they are not Andrews connectors, they are of high quality and work quite well. 73, Charlie N9CO --Original Message-- From: Jerry R <jerry@daca.net>
Let's put this in context. Mike, W9RE, and Craig, K9CT, both have built big multi-op contesting stations, where cable runs to antennas are long and crosstalk between stations is a big deal. I have th
While they are not Andrews connectors, they are of high quality and work quite well. BUT -- remember that there are many variations in the construction of hard line, even by the same manufacturer, an
That's why I use N type connectors. Much more likely to be water proof when installed correctly. UHF connectors are inexpensive and not considered water proof. Most commercial installations will use
I still weather protect all connectors..as does the industry. Mastic and tape or 3m coldshrink...but I do live in a hurricane prone area.... Cecil K5DL Sent from my iPad _____________________________
I don't use N on coax below 6M, but I do use N or BNC at 6M and above. A year or so ago, I discovered an EXCELLENT N-connector for coax of RG-8 and RG-213 size in a box of stuff that I bought from th
I want to thank everyone who made comments either pro or con regarding my short run cable dilemma. For those who do not know my background, I did the licensing work and specified the equipment to be
If you're not using it for the rotor loop, I don't see why a coax run would be subjected to ANY, let alone repeated, flexing. Barry N1EU _______________________________________________ TenTec mailing
Any transmission line is subject to several different stresses and torques. The longer the line the more effect. While rigid hard line may not be affected as much as say RG58 or #12 wire, it still mu
One cause, typical thermal expansion and contraction caused by heating and cooling. The line strapped to the tower will have a different temp coefficient due largely to its black jacket while the tow
Interesting discussion. I found this info on the LMR400 issue: http://www.mail-archive.com/repeater-builder@yahoogroups.com/msg60031.html Barry N1EU _______________________________________________ Te
Great discussion site. Note this piece applies to ALL aluminum foil and copper braid construction shielded coaxial cables not just LMR-400. On another related thread there was an opinion that LMR-400
It's also important to realize that loss in coax below about 500 MHz is due ONLY to copper losses (I squaredR). The only effect of the dielectric is to allow a larger diameter center conductor for a
What am I missing here? Skin effect. The resistance in the equation is the resistance at the frequency of interest, which is a multiple of the DC resistance, and follows well known equations. The pri
Yes. That's how skin effect works -- the magnetic field created by current pushes that current to the outer skin of any conductor. Remember also that with coax, also due to skin effect, differential
Another concept that helps understanding the importance of DC resistance at RF -- conductance is the conductivity of the material multiplied by the cross-sectional area of the conductor. At DC, the c
Should I worry about the 55 feet of LMR400 that is buried in my back yard and feeds my vertical... or is it sufficiently stable in the ground to avoid galvanic corrosion? -- K8JHR -- http://www.mail-