Hi Travis- I understand (and agree with) your point- But Sometimes the installation calls for a longer one. I have seen 4-10 ft ones for various reasons. Sometimes the specification for the job calls for that size cable because the owner has it in his head that there may be .025 dB less of loss. Mind you- I am NOT saying not to use a smallish cable, I'm just about the flimsiness of the connector Trango chose. SMAs weren't really designed for use on flexible cables anyway.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Travis Johnson Sent: Thursday, February 08, 2007 10:17 AM To: WISPA General List Subject: Re: [WISPA] Little installation gotchas. SMA Connectors Ralph, When you are talking a 12" or 18" pigtail, using LMR-195 vs. LMR-400 or even LMR-600 there is going to be less than .5db difference. Why would you need such a large cable for just a small jumper cable? Travis Microserv Ralph wrote: > Does anyone else have an issue with the tiny little SMA connector that > Trango and some others use for antenna connections? > I have seen several failures where the mating connector on the antenna > feed line self destructs due to leverage caused by the cable. Nothing > kills an installation budget quite as bad as having to do another > tower climb or even a parts run due to something as silly as this! And > if you have to go back because of a later failure at this point it is even worse! > > Good RF sense tells you to use as large of a cable as practical for > less loss and for compensation for connector loss, but when using > LMR400 (and I have even seen one WISP use LMR600) for a jumper it is very unstable. > > I feel that in order to eliminate this very real single point of > failure, this manufacturer needs to redesign that area. > > I don't want to hear that because Trango has either/or dual polarity, > it provides built in backup redundancy- unless you do every > installation with a dual pol antenna and have smart enough people to > know to switch pol when the cheesy little connector fails. <grin> > > > > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
