Key word... --->jumpers<--- You didn't have the feedline connected directly to the antenna.
Although I have to question the logic in using 1/2" that isn't Superflex for a jumper for the same reasons. Standard hardline doesn't have much absorbing properties compared to Superflex or coax, and please don't tell me it was used to reduce the loss. With a couple feed of coax, the loss doesn't get significant until around 5-10 GHz, if that low. Joe M. Joe wrote: > We had thousands of 1/2" hardline jumpers connected to antennas at my > last job. It was the standard to use 1/2" LDF4-50A for the jumper. > > Joe > > > MCH wrote: >> To reduce vibrations from the antenna being conducted to the feedline. >> As it's not flexible, it will crack and/or break. I've also seen cases >> where the antenna connector was vibrated right out of the antenna. >> >> Adding the flexible jumper acts as a 'shock absorber' and absorbs any >> vibrations. >> >> That's why they include jumpers with commercial antennas. >> >> Joe M. >> >> Joe wrote: >> >>> OK, why? I've had this argument before......Joe >>> >>> MCH wrote: >>> >>>> Hardline/Heliax should *never* be connected directly to an antenna. >>>> ALWAYS use a jumper. >>>> >>>> Joe M. >>>> >>>> >>> ------------------------------------ >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >>> ------------------------------------------------------------------------ >>> >>> >>> Internal Virus Database is out of date. >>> Checked by AVG - www.avg.com >>> Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 >>> 05:58:00 >>> >>> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > ------------------------------------------------------------------------ > > > Internal Virus Database is out of date. > Checked by AVG - www.avg.com > Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 > 05:58:00 >
