Re: [Repeater-Builder] Re: That horrible noise: SOLVED
I have a similar problem with a battery charger inside the transfer switch cabinet for my backup generator. It's a switcher. The outputs run through 30 ft of #14 wire in plastic conduit out to the generator. I could hear the signal every 101 kHz starting at 404 kHz and running up to over 5 MHz. An IC-R10 receiver would pick it up strongest at the generator itself. The only way I could get rid of the radiation was to remove the DC connections to the wires running to the generator. The manufacturer sent me two clip-on ferrites for the DC wires but they had no effect. Their recommendation was to replace it with a linear charger, which I have acquired but not yet installed. This was hard to find, too. I turned off each circuit breaker in the panel but none got rid of the signal. Eventually I even pulled the main 100A breaker; THAT finally made things quiet. Of course, the only thing that was directly connected to the raw incoming power was the charger inside the transfer switch. All the metal shielding did nothing for it. It's amazing how 101 kHz harmonics can ruin spectrum analyzer traces for the AM broadcast band ! Bob M. == --- Dave VanHorn <[EMAIL PROTECTED]> wrote: > > Well, in the end, it turned out to be the IOTA power > converter. > > This is something that didn't show up in extensive > testing here, and > didn't show up at the site for a while either. > > With modern SMPS designs, you can't really use the > term "switching > frequency", since the controllers do things like > pulse skipping > under light load, or frequency modulation to > "spread" the noise > making part 15 easier. Even an older switcher that > runs at a fixed > frequency, will be doing PWM, so there will be > another frequency > component that moves around under load. > > However that works out in the IOTA, it was apparent > that this was > the source. I was able to hear broad hash on my > IC-R3 held close to > the unit, and tuning up to the repeater input, I > could hear the mix > product as well. I replaced it with a linear supply > since I had one > handy, and the problem's been totally gone for over > a week. > > :) > > I spoke to IOTAs technical people, who were pretty > knowlegable. > They offered to exchange the unit, and came up with > the same > probable fix that I did, ferrites on the line cord > and DC cables. > Since the unit is in a metal box, I think that this > will likely > solve the problem. > > Key symptoms of this problem: > Comes and goes. > Gets through CTCSS squelch, IF you encode the same > tone you decode. > (because it's mixing your output back in) > Has audio that sounds like an echo or fast repeat, > but the audio is > rather weak. > > Cause: Repeater output mixing with switching power > supply noise, > producing a real carrier on the repeater input. > > Won't happen on a 440 machine, or probably a 220 > machine, due to the > wider splits. Switchers are increasing their > operating frequencies > to keep the magnetics small, so having significant > noise at 1.2 MHz > bothering a 220 machine isn't out of the realm of > possibility. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise: SOLVED
The time has come for everybody to clean up their own back yard. I hear those Iota's make for pretty good target practice with 000 buck shot. On 5/2/06, Dave VanHorn <[EMAIL PROTECTED]> wrote: > --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: > > > > At 5/2/2006 06:56, you wrote: > > > > >Well, in the end, it turned out to be the IOTA power converter. > > > > :-(#) I thought you said you tried shutting down the switching > supply. > > Yes, there may be another switcher close by. There is a 440 repeater > in the same room, and various computers on the floor below. A hit > from one of those probably gave me the idea that it wasn't coming > from my box. > > > > the systems & had to be heavily filtered. Turns out the 100 AH > wet NiCd > > batteries only filter to ~400 kHz, above that they look inductive. > > Of course. :) That is one way to gage state of charge, by looking > at their absorption spectrum. > > > > > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise: SOLVED
At 5/2/2006 06:56, you wrote: >Well, in the end, it turned out to be the IOTA power converter. :-(#) I thought you said you tried shutting down the switching supply. Until I get metered for power at my sites, I'm sticking to linears at all of them for just this reason. I do maintain one site that runs off of batteries with a switching charger; it caused a spurious problem on one of the systems & had to be heavily filtered. Turns out the 100 AH wet NiCd batteries only filter to ~400 kHz, above that they look inductive. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Yep, that's how we've tracked down CATV leaks for years. Nice loud buzz. Chuck WB2EDV - Original Message - From: "Ken Arck" <[EMAIL PROTECTED]> To: Sent: Friday, April 21, 2006 9:03 PM Subject: Re: [Repeater-Builder] Re: That horrible noise > At 08:58 PM 4/21/2006 -0400, you wrote: > >>You wouldnt hear the sync buzz,your rx is to narrow! > > <--I ABSOLUTE disagree with this. You can easily hear sync buzz on a NBFM > receiver. > > Ken > > -- > President and CTO - Arcom Communications > Makers of the world famous RC210 Repeater Controller and accessories. > http://www.ah6le.net/arcom/index.html > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 08:58 PM 4/21/2006 -0400, you wrote: >You wouldnt hear the sync buzz,your rx is to narrow! <--I ABSOLUTE disagree with this. You can easily hear sync buzz on a NBFM receiver. Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
You wouldnt hear the sync buzz,your rx is to narrow! I live with the beast here,coming from a neighbors house who wont let me find or fix it. It mixes with ANY vhf signal and sends it back at me every 10khz up and down the band. I can get away from it if I offset either the rx or tx freq by a few khz. OTOH,they cant watch cable anywhere near 2 metersNow 70cm works good until a scanner pops up on the local pd freq. LO=my input! What can ya do???73,Lee Bob Dengler wrote: > At 4/21/2006 01:24 PM, you wrote: > >> At 01:02 PM 4/21/2006 -0700, you wrote: >> >>> At 4/21/2006 12:17 PM, you wrote: >>> >>> first. Another common culprit is site video cameras: 38th harmonic of 15.75 kHz is 598.5 kHz, so see if the interfering signal is 1.5 kHz above or below your input. >>> Since your RX offset is minus (146.85 -), interference from a horizontal >>> sync mix would appear 1.5 kHz above your input, or 146.2515 MHz. >>> >> <---Horizontal sync "buzz" is VERY distinctive sounding. Nothing I heard in >> that recording comes close to approaching its sound. >> > > When I had the problem I never heard any sync buzz, just a carrier > containing the repeater TX output modulation 1.5 kHz above the RX center > freq. (this system was also minus offset). The source point was a security > camera at the site. > > Bob NO6B > > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
There should be a point where you turn the transmitters power output down and it stops, what is it? When we had "The Beast" this was about 1W out of the transmitter Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 4/21/2006 01:24 PM, you wrote: >At 01:02 PM 4/21/2006 -0700, you wrote: > >At 4/21/2006 12:17 PM, you wrote: > > > >>first. Another common culprit is site video cameras: 38th harmonic of > >>15.75 kHz is 598.5 kHz, so see if the interfering signal is 1.5 kHz above > >>or below your input. > > > >Since your RX offset is minus (146.85 -), interference from a horizontal > >sync mix would appear 1.5 kHz above your input, or 146.2515 MHz. > ><---Horizontal sync "buzz" is VERY distinctive sounding. Nothing I heard in >that recording comes close to approaching its sound. When I had the problem I never heard any sync buzz, just a carrier containing the repeater TX output modulation 1.5 kHz above the RX center freq. (this system was also minus offset). The source point was a security camera at the site. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 01:02 PM 4/21/2006 -0700, you wrote: >At 4/21/2006 12:17 PM, you wrote: > >>first. Another common culprit is site video cameras: 38th harmonic of >>15.75 kHz is 598.5 kHz, so see if the interfering signal is 1.5 kHz above >>or below your input. > >Since your RX offset is minus (146.85 -), interference from a horizontal >sync mix would appear 1.5 kHz above your input, or 146.2515 MHz. <---Horizontal sync "buzz" is VERY distinctive sounding. Nothing I heard in that recording comes close to approaching its sound. And yes, I know it is AM but that is one reason I suggested the heterodyne approach - it would be very evident Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 4/21/2006 12:17 PM, you wrote: >first. Another common culprit is site video cameras: 38th harmonic of >15.75 kHz is 598.5 kHz, so see if the interfering signal is 1.5 kHz above >or below your input. Since your RX offset is minus (146.85 -), interference from a horizontal sync mix would appear 1.5 kHz above your input, or 146.2515 MHz. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Remeber, it isn't nessacarilly your power supply. On 4/21/06, Dave VanHorn <[EMAIL PROTECTED]> wrote: > > > Yes, but now we're debugging a problem on your repeater, correct? > If so, > > replace the switcher with a linear supply & see if the problem > continues. > > Keeps happening with the power supply at my site shut down. > I have a relay that I can command from the controller, to shut off the > AC input to the system. > > I don't remember what exactly the number was, but I did check this > IOTA supply for any output around 600 khz before installing it. > > > > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 4/21/2006 12:10 PM, you wrote: > > No, listen to the beginning of each audio segment. It's classic RF > > feedback with audio delay. Sounds like a Kendecom too. > > > > Bob NO6B > > >I'm not sure what you mean here.. > >The equipment you're listening to is Daniels MT-2 VHF, with 21.5 MHz >first IF. OK, I've never heard a Daniels repeater before so maybe they have similar audio characteristics (lack of low frequencies in repeated audio, soft "pop" from squelch audio gate when opening). At any rate, see my previous post: investigate the switching supply first. Another common culprit is site video cameras: 38th harmonic of 15.75 kHz is 598.5 kHz, so see if the interfering signal is 1.5 kHz above or below your input. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 4/21/2006 09:09 AM, you wrote: >--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote: > > > > I'd be interested in hearing the wav file you recorded, Dave > > > > But bear in mind that your comment that it's not coming from either > > repeater could easily be wrong. As a matter of fact, if you're >running a > > delay in the audio path of either repeater, one of them is most >definately > > involved. It sounds like a typical spur/mix/intermod issue to me, >probably > > involving a 3rd party. > > > > Anyway, let's have a listen. > > >Well, the same problem is happeing in two machines. >Interestingly the one that does use a switcher to charge the battery >is mine (the 85), and the problem happened on the other repeater long >before I installed my switcher. The 73 uses an astron linear supply. > >I'm aware of the possibility of mixing with a switcher, but the >problem also happens when mine is shut down. Yes, but now we're debugging a problem on your repeater, correct? If so, replace the switcher with a linear supply & see if the problem continues. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 4/21/2006 10:47 AM, you wrote: > > It's there, enjoy. > > > > I've run it through spectrum analysis. The 60 Hz hum is in my > > soundcard/computer, and you can see the 127.3 PL, but that's encoded > > by the repeater. The rest is pretty indistinct in time or frequency, > > but I hear a repetitiveness to it at about 4 Hz. > > Kind of like listening to a short sequence pseudonoise generator. > >Sounds like medium to high speed data-specifically it sounds like a >control channel from a trunked system, or maybe a mobile data terminal >system, or cellular... No, listen to the beginning of each audio segment. It's classic RF feedback with audio delay. Sounds like a Kendecom too. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
> It's there, enjoy. > > I've run it through spectrum analysis. The 60 Hz hum is in my > soundcard/computer, and you can see the 127.3 PL, but that's encoded > by the repeater. The rest is pretty indistinct in time or frequency, > but I hear a repetitiveness to it at about 4 Hz. > Kind of like listening to a short sequence pseudonoise generator. Sounds like medium to high speed data-specifically it sounds like a control channel from a trunked system, or maybe a mobile data terminal system, or cellular... -- Jim Barbour WD8CHL Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 05:35 PM 4/21/2006 -, you wrote: >I just got a phone report of hearing a voice in the noise this >morning, but neither of us can hear it on the input. <---Probably matrixing Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 05:28 PM 4/21/2006 -, you wrote: >Interesting.. As it happens, I have the HP sig gen handy. >Right on the input freq, or slid a bit? <---I would doubt that the interfering signal is going to be exactly that of your sig gen but regardless, the point here is to create an audible heterodyne. Adjust your sig gen as needed :-) Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Classic 600kHz mix, Find a AM radio and tune it to 600kHz and walk around, you may be supprised. On 4/21/06, Ken Arck <[EMAIL PROTECTED]> wrote: > At 05:24 PM 4/21/2006 -, you wrote: > > >I had it zipped, but it didn't make much gain. Not too surprising I > >guess. > > <---Saved about a meg when I zipped it, which semed like a worthwhile > improvement to me! > > Ken > -- > President and CTO - Arcom Communications > Makers of the world famous RC210 Repeater Controller and accessories. > http://www.ah6le.net/arcom/index.html > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 05:24 PM 4/21/2006 -, you wrote: >I had it zipped, but it didn't make much gain. Not too surprising I >guess. <---Saved about a meg when I zipped it, which semed like a worthwhile improvement to me! Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
By the way, Dave. One thing I'd try if it were me, would be to generate a weak signal on the input of the repeater and see what the heterodyne created by this "mystery signal" sounds like. That would go a long way in identifying what it is too... Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Sounds like a definate "transmitter being heard by receiver with audio delay" to me. Is it always that quieting? Wow Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 05:09 PM 4/21/2006 -, you wrote: >--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote: >It's there, enjoy. > >I've run it through spectrum analysis. The 60 Hz hum is in my >soundcard/computer, and you can see the 127.3 PL, but that's encoded >by the repeater. The rest is pretty indistinct in time or frequency, >but I hear a repetitiveness to it at about 4 Hz. >Kind of like listening to a short sequence pseudonoise generator. <--I'm zipping it up to make for a smaller download for everyone. It should be available shortly at: ftp://ftp.ah6le.net/pub/noise/hnoise.zip Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Put it up on my anonymous FTP site. That way anyone who wants to hear it can download it: ftp://ftp.ah6le.net/incoming Once it's there, I'll move it to the /pub directory so everyone can access it Ken At 04:48 PM 4/21/2006 -, you wrote: > >> So, where I can hear the wav file? > >Can I email it somewhere? > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
Dave Whether they're active (actually transmitting) or even supplied with power is irrelevent. If they have an antenna connected to their PAs, that's all that matters in intermod issues. With the new freqs you supplied, still no 1st through 5th order products are found however (although obviously I can't plug in the freqs you don't know ) Ken At 04:47 PM 4/21/2006 -, you wrote: > >> With the UHF freqs in the equation, maybe something else will jump >out > >Well, there are three UHF machines involved I guess. >444.375- at the 73 site, and 441.9 at the 85 site, plus this >commercial one at my site, that I don't have the freq for. >At the 73 site there is normally a 220 machine, but it's sitting on my >desk at the moment, so I think we can rule it out. > >The 444.375 is very inactive, and isn't active when this problem is >happening. The 441.9 is shut down. The commercial one is also rather >inactive, and seems to make no difference. It's a black box about 3U >high with "freedom" on the front, but no other identifying information. > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 04:30 PM 4/21/2006 -, you wrote: >460-ish, and no, no isolators. <---Hopefully you can find out the exact freqs Dave. That other repeater could easily be part (or the missing 'link') of the problem. So, where I can hear the wav file? Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
At 04:14 PM 4/21/2006 -, you wrote: >This is pretty likely. I'm almost alone at my site, sharing with a >low power UHF repeater. <---What's the freq(s) of the UHF machine? (that it's running low power has nothing to do with it ). I also assume none of the machines are running an isolator? Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.ah6le.net/arcom/index.html Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: That horrible noise
You must cover a search radius of 1/4 to 1/2 of a mile from the antenna. Problem goes away when you run the repeater into a dummy load, right? Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
