Fair rite has options for 1 to 300 Mhz and 25 to 300. Any idea which you chose?
This is 101.6 mm which is 4 inches www.fair-rite.com/cgibin/catalog.pgm?THEONEPART=2643814002&SEARCHAGAIN=N#select:onepart I figure the cable is 3/8" * 10 loops or 95.25 mm Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Thu, Jul 23, 2015 at 11:44 AM, Adam Moffett <dmmoff...@gmail.com> wrote: > I'm not sure if the link matches what you're describing. The link is to > a clip-on ferrite for a single cable up to 8.7mm diameter. > > On 7/23/2015 11:30 AM, Josh Luthman wrote: > > That's got room for 6" of cable. I figure that's enough for 10 loops? > > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > On Thu, Jul 23, 2015 at 11:21 AM, Adam Moffett <dmmoff...@gmail.com> > wrote: > >> No. Bigger. >> >> >> On 7/23/2015 11:20 AM, Josh Luthman wrote: >> >> Like this? >> http://www.newark.com/fair-rite/0475178281/frequency-min-200khz/dp/82X7129 >> >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> On Thu, Jul 23, 2015 at 11:14 AM, Adam Moffett <dmmoff...@gmail.com> >> wrote: >> >>> Yeah I know a site that had nothing but problems at a 35kw FM station. >>> Fiber and DC to a CMM4 at the top finally made it all work. Short, >>> shielded jumpers from the CMM to the AP's. They still had occasionally >>> spats of CRC errors, but not bad enough to affect service. >>> >>> Never had any luck with ferrites until I got big ones. At >>> fair-rite.com I found one that was I think 300ohms at 100mhz, and it >>> was big enough to loop the cat5 through it 10 or 11 times. I think the the >>> deal is you square the impedance for every extra loop you make through the >>> ferrite, so just sticking a ferrite on the cable doesn't do nearly as much >>> as looping through it a bunch of times. I have not tried that at the 35kw >>> site, but it did work at a 3kw site. >>> >>> >>> On 7/23/2015 2:22 AM, Joe Falaschi wrote: >>> >>>> We have 450 APs at 410 feet with a 50k station just above it, something >>>> like 440 to 500 feet or something. We see some minor CRC errors on the 450 >>>> and more so on the FSK and that is with fiber up the tower. We tried an >>>> EPMP at the same elevation and we couldn't connect an SM to the AP much >>>> less even get into the AP's management page. This seems like it was over a >>>> year ago. We didn't do a whole lot of investigation. We like EPMP a lot >>>> but it didn't work for us on a high power FM site when the two units were >>>> close. >>>> >>>> That said we have an EPMP on the same tower at 120 feet that we are >>>> using as a BH to another site and it is working great. So, your situation >>>> may work out ok. >>>> >>>> FYI, we have the radio station turn the transmit power down each time >>>> we climb. They don't like to do that during the morning and evening drive >>>> time. >>>> >>>> Joe Falaschi >>>> e-vergent >>>> >>>> >>>> On 7/22/15 6:15 PM, George Skorup wrote: >>>> >>>>> I have a connectorized ePMP on a 2' dish at 125 feet on a 50kW FM >>>>> site. The bays start at 420 feet though. And it's 50kW EIRP. Something >>>>> like >>>>> 15-16kW actually on the transmission line. There's also a low power >>>>> station >>>>> at 250 feet, but it's under 3kW I think. The 450 AP at 225 feet sees some >>>>> CRC errors sometimes. The ePMP radio doesn't have any problems though. The >>>>> guys didn't listen to me and ran our cat5 bundle right next to the high >>>>> power transmission line. "But there were waveguide brackets there, it was >>>>> so easy!" I smash your face now. >>>>> >>>>> On 7/22/2015 4:00 PM, Josh Luthman wrote: >>>>> >>>>>> Has anyone had good luck on FM stations recently? I would *LOVE* for >>>>>> the radios to have an SFP, but it seems that's just not available. I'm >>>>>> wonder if fiber up ~250' and then 10-20 foot shielded cat5 would be >>>>>> sufficient to protect the ethernet ports from such high power. >>>>>> >>>>>> I'm also weary about getting on the tower for having such high power >>>>>> 250 feet away, but that's a secondary issue. >>>>>> >>>>>> Josh Luthman >>>>>> Office: 937-552-2340 >>>>>> Direct: 937-552-2343 >>>>>> 1100 Wayne St >>>>>> Suite 1337 >>>>>> Troy, OH 45373 >>>>>> >>>>> >>>>> >>>> >>> >> >> > >
