--- In Repeater-Builder@yahoogroups.com, "Radioman" <radio...@...> wrote: > > Channel 2 may not go off the air on February 18. The entire NPRM is here: > http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-08-281A1.pdf > > Harry, W0OZL > > > > 1. The Short-term Analog Flash and Emergency Readiness Act ("Analog > Nightlight Act" or > > "Act")1 requires the Commission to develop and implement a program by > January 15, 2009, to > > "encourage and permit" continued analog TV service after the February 17, > 2009 DTV transition date, > > where technically feasible, for the purpose of providing "public safety > information" and "DTV transition > > information" to viewers who may not obtain the necessary equipment to > receive digital broadcasts after > > the transition date. In this way, the continued analog service would serve > like a "nightlight" to unprepared > > viewers, assuring that these viewers continue to have access to emergency > information and guiding them > > with information to help them make a belated transition. This Notice > describes the procedures the > > Commission intends to follow to implement the Act; the nature of the > programming permitted by the Act; > > and the stations that are eligible to participate in the Analog Nightlight > program. Stations that are eligible > > under the Act to provide nightlight service may choose to provide their own > service on their analog > > channels, or may choose to work with other stations in their community to > provide a comprehensive > > nightlight service on one or more analog channels in that community. > Stations that cannot broadcast their > > own nightlight service can participate in a joint nightlight effort together > with other stations in their > > community by providing financial, technical, or other resources. > > ----- Original Message ----- > From: "JOHN MACKEY" <jmac...@...> > To: <Repeater-Builder@yahoogroups.com> > Sent: Friday, December 26, 2008 3:54 PM > Subject: [Repeater-Builder] More 6 meter repeater interference!! > > > > I've had it. I am DEMANDING that the local TV channel 2 STOP transmitting > > or > > change to a different frequency to end the interference they are causing > > my 6 > > meter repeater. >
--- In Repeater-Builder@yahoogroups.com, "Milt" <men...@...> wrote: > > A similar war story from back in the early 90's...Commercial customer with a 35MHz base complaining of dramatically reduced range. Base and mobiles checked out fine, antenna system fine, just trouble receiving the mobiles. Dropping the PL with the antenna connected I noticed what seemed to be a constant carrier. A bit of wandering about with a scanner using increasingly short lengths of wire for antennas brought me to a nearby house. The noise seemed to be radiating on the telephone line and the power line. The house was a rental owned by the company with the radio so after proper contact was made an inside sweep found the ... telephone answering machine!?!?!?! > > The device was powered by a wall wart supply with an very long cord (getting any clues yet?); which had recently come back from a repair center. The wall wart had a slightly audible hum. A snap together ferrite with as much of the excess power wiring wound onto the ferrite as possible, and another ferrite on the telco line brought the noise to a level that was not detectable at the base station. > > Milt > N3LTQ > > ----- Original Message ----- > From: neal Newman > To: Repeater-Builder@yahoogroups.com > Sent: Friday, December 26, 2008 9:39 AM > Subject: Re: [Repeater-Builder] Six Meter Repeater Noise Issues > > > Noise on the six meter repeater. > On my machine 53.67 in New jersey I was getting noise that was holding the machine Keyed up. then drop. and key up again. I thought it was desense Even with a big expensive > Commercial Duplexer. with the transmitter off, the normal unsquelched Hiss sounded Fine No noise that we could detect. after weeks of this. We finally found out what the Problem was. the 2 meter,and 440 machines next to it ran just fine.however They both had an IRLP link on them. The Noise problem turned out to be the Router/switch. > The Noise it was creating was just at the threshold level to Key and hold open the repeater. > BTW. The 6 meter machine was in PL with a Tone of 67hz...... Not a good choice. > between the60 cycle noise of a bad wall wart for the router switch and the noise it created. > might as well put a flea power transimitter with PL sitting on the repeaters input. > changed the router swich and PL tome. and Problem wentt away. > Verizon uses cheapo routers. we placed the new one in a shielded box > > Neal-KA2CAF > > --- On Thu, 12/25/08, Mike Morris WA6ILQ <wa6...@...> wrote: > > From: Mike Morris WA6ILQ <wa6...@...> > Subject: Re: [Repeater-Builder] Six Meter Repeater Noise Issues > To: Repeater-Builder@yahoogroups.com > Date: Thursday, December 25, 2008, 10:12 PM > > > At 11:06 AM 12/25/08, you wrote: > > > Hi To All & Hope everybody had a good Christmas, > > While the subject was brought up, I have been having a similar experience here at my location. > It is not on a repeater, but a simplex radio (vertex VX3000l mobile) for a base on the natl Red Cross freq of 47 mhz. > In the daytime the receiver is quiet and hears fine. > It seems as about the time the sun starts going down, the receiver's squelch opens and has a constant static noise for many hours but still receives fine. > It may do it all night, I don't know, I haven't stayed up to see, just leave the radio on and go to bed. > Was wondering if could be power line noise (but why wouldn't do in daytime also)? > Is there any interference to the HF bands like this at night? > > Thanks, > Mike KB5FLX > > An old trick - if the on-time changes about 6 minutes a day then it's light-dependent (i..e a photo-electric triggered yard light). > > In your shoes I'd power the radio from a gell-cell, > and then go flip breakers off one at a time. > That will tell you if the noise source is inside > the house, and if so, on which breaker. > > Mike WA6ILQ > Hi list.... Something I haven't seen mntioned in regard to external noise levels into repeaters is the National Digital Broadcast TV Conversion from Analog TV and the frequency move to all UHF Digital that was planned accordingly! Not many Technicians are trained in DC pulse situations and techniques that creat spectrum noise that will wipe out a repeater input. The vertical leading and trailing edges of a DC Pulse are FULL of high frequency noise components and the top of the pulse contains lots of low frequency noise components. I'm retired from Western Union where they used to put DC pulses routinely down local wire phone lines, when it didn't matter! But they had to convert to Audio signals with conversions at the ends when Electronic Data Sets came into being, and Phone Company Linemen got tired of 110 VDC shocks, then with multiplex conversions when the number of data customers went up per line!! With the growing number of FAX machines and modern data sets, Western Union went out of busines in 1992, but sold the name of "Western Union" to AT&T... A DC pulse has LOTS of wide frequency spectrum noise, with high frequency harmonic components in the leading and trailing edges, and low frequency components in the top of the pulse. I'm in the Pacific Northwest, and from the Portland, Oregon area I have reports that the spectrum noise level has increased 20db from what it used to be! I can also listen to the repeaters and hear it comming through, where others not so trained don't reconise it. With TV Broadcasting and both Commercial and ham repeaters spread out over the length of Portland's West Hills, this has wiped out some ham repeater inputs in that area! In addition, with the Digital Conversion, the origional 350 to 475 Megawatt Analog TV output power per station has been raised to 750 and more!! That means a GREAT amount of noise power!! We can't stop the Digital Conversion, but it's results are something to think about!! As it is, according to Industry Scources, the new President will appoint a new FCC Chairman. A while back Congress reassigned TV channel 69 to Public Safety, as an overflow from 800 - 950(??) Public Safety Trunking, but the FCC chose to auction it off instead!! We shall see what happens next...!! Dick Warren, CET, W7TIO