Any updates Jaime Solorza On Feb 24, 2015 11:43 AM, "Chuck McCown" <[email protected]> wrote:
> Yep, however the chart does have warnings. I just wanted to take a > close look. > > *From:* Bruce Robertson <[email protected]> > *Sent:* Tuesday, February 24, 2015 11:12 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] 711Mhz carrier? > > They let you get that close in Class B? Hmmm... > > On 02/24/2015 09:00 AM, Chuck McCown wrote: > > Probably 300 feet but probably right in the center of the lobe too. > > *From:* Ty Featherling <[email protected]> > *Sent:* Tuesday, February 24, 2015 9:40 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] 711Mhz carrier? > > Cool. How far from it did you get? > > -Ty > > On Tue, Feb 24, 2015 at 10:38 AM, Chuck McCown <[email protected]> wrote: > >> All the aircraft radios noised up and became unusable and I was in >> class B airspace at the time flying with a clearance. >> >> *From:* Ty Featherling <[email protected]> >> *Sent:* Tuesday, February 24, 2015 9:28 AM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] 711Mhz carrier? >> >> What happened? >> >> -Ty >> >> On Tue, Feb 24, 2015 at 10:25 AM, Chuck McCown <[email protected]> wrote: >> >>> EIRP. >>> That is a 100 kW transmitter and a 10 dB antenna. >>> Don’t fly your plane too close to those. I did it once. >>> >>> *From:* Ty Featherling <[email protected]> >>> *Sent:* Tuesday, February 24, 2015 9:23 AM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] 711Mhz carrier? >>> >>> 1mil Watts? Whoa! >>> >>> -Ty >>> >>> On Tue, Feb 24, 2015 at 10:07 AM, Bill Prince <[email protected]> >>> wrote: >>> >>>> I read somewhere about lots of intermod issues with the transition to >>>> DTV a few years back. Probably more pronounced with the kind of power >>>> levels they are using on some DTV stations. I know that at least a couple >>>> of DTV stations are transmitting at 90 dBm up on Sutro in SF. >>>> >>>> bp >>>> <part15sbs{at}gmail{dot}com> >>>> >>>> >>>> On 2/24/2015 6:24 AM, Chuck McCown wrote: >>>> >>>> The inadvertent diode story has been around for a long time. I think >>>> it was much more of a problem when you had two broadcasters at a site where >>>> the difference between their frequencies was on a 2 way FM repeater input >>>> frequency. Every active electronic device on the whole site could do the >>>> same thing. Remember how everyone used to obsess about intermod products >>>> at tower sites. Doesn’t seem to be much of a problem any more. Or perhaps >>>> it is but we are all on cell phones now. >>>> >>>> *From:* Bill Prince <[email protected]> >>>> *Sent:* Monday, February 23, 2015 5:14 PM >>>> *To:* [email protected] >>>> *Subject:* Re: [AFMUG] 711Mhz carrier? >>>> >>>> Oh I know. Our tower manager at Black Mt. goes semi-ballistic when >>>> he sees anything on the tower that is not HDG or stainless or >>>> silicon-bronze. Then tells the story of rusting bolts/nuts/washers turning >>>> into diodes in the presence of higher-power RF. I don't know how high the >>>> power needs to get, but we have seen some interesting side-effects on >>>> unshielded cable and other unshielded components. >>>> >>>> bp >>>> <part15sbs{at}gmail{dot}com> >>>> >>>> >>>> On 2/23/2015 4:04 PM, Jaime Solorza wrote: >>>> >>>> Noise can come from most unexpected places. CQ rag had a story on spark >>>> plug caused noise on motorcycle knocking out a satellite system on bank >>>> building. Chucks advise is good >>>> And that would be my first step >>>> >>>> Jaime Solorza >>>> On Feb 23, 2015 3:08 PM, "Peter Kranz" <[email protected]> wrote: >>>> >>>>> Had an AT&T contractor show up at one of our datacenter sites today >>>>> and claim that one of our radio systems was emitting a carrier at 711Mhz >>>>> and he pointed at where we have a Dragonwave Compact 18Ghz system and >>>>> Redline AN-80i 5Ghz system mounted on the building. >>>>> >>>>> >>>>> >>>>> 711Mhz doesn’t sound like an IF of either of these systems to me, but >>>>> I’ve got tickets in with the equipment manuf. It looks like they are some >>>>> 3 >>>>> rd party AT&T has sweeping buildings downtown. Anyone dealt with >>>>> these guys before? He told me he measured a -87 with his directional >>>>> antenna 10 feet away from the equipment and acted like that was a really >>>>> big deal, sounds like a pretty low level to me honestly. Anyone know what >>>>> the legal limits for spurious emissions are in the 700-800Mhz band? >>>>> >>>>> >>>>> >>>>> >>>>> *Peter Kranz*Founder/CEO - Unwired Ltd >>>>> www.UnwiredLtd.com <http://www.unwiredltd.com/> >>>>> Desk: 510-868-1614 x100 <510-868-1614%20x100> >>>>> Mobile: 510-207-0000 >>>>> [email protected] >>>>> >>>>> >>>>> >>>> >>>> >>>> >>> >> >> > > !DSPAM:2,54ecae1d282581898217438! > > >
