Jim, Yes, and all coax with the same label is not created equal. And what I meant to say above is that dielectric losses are negligible at 2 MHz. I forget the details, but before I installed over wel
"The graphs are total loss... so copper loss is in both conductors, but if you examine the geometry of most coax cables, most of the loss is in the centre conductor (typically around 70-85%). For the
Paralleling two runs of line does not decrease the insertion loss. That depends. Given the same source and load Z as with the single run, it does decrease the loss, because the current divides betwe
I buy my quad shield Commscope RG-6 directly from a CATV distributor in bulk so I know it is outdoor rated as well as having published specs. The stuff from box stores, RatShak, Fleabay, hamfests, et
At CATV frequencies or 160m? Or both? I've heard it said that quad shield only helps at VHF+. I don't know. 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting
Paralleling two runs of line does not decrease the insertion loss. That depends. Given the same source and load Z as with the single run, it does decrease the loss, because the current divides betwee
Simple -- dig up the mfr data sheets. Belden data sheets is on the web. So is Times. 73, Jim K9YC _________________ Topband Reflector Archives - http://www.contesting.com/_topband
VHF/UHF for the better cables, the cheap stuff even from the big companies was failing down in HF, we only tested down to 5 MHz and up to 450 MHz. The good stuff passed at better than 80dB shield eff