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
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
--- 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
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
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 lik
--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
>
> 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.
I know. The narrow b
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
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 Com
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
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
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<*> To unsu
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.
> >
>
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 -), inter
--- In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote:
>
> Remeber, it isn't nessacarilly your power supply.
>
True, but that's the only one I have control over.
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<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater
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 appea
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
> 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 t
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
>fir
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 m
> 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. We do have a kendecom in the 73 syst
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 repetit
--- In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote:
>
> Actually it probably would of been better if I measured in octaves,
> but that would of taken too long and not of been so simple.
>
> Just currious, Do you have a AM radio station on 590, 600 or 610KHz
in
> the vincini
I don't seem to be able to upload files at this point.
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<*> To visit your group on the web, go to:
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<*> To unsubscribe from this group, send an email to:
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<*> Your use of Yahoo! Groups is subjec
> 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...
I didn't see anything in the spectrogram that would lead me to that.
I didn't see any steppiness or distinct components othe
> 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 lik
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 C
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.
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 wh
--- In Repeater-Builder@yahoogroups.com, 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 m
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
--
Presid
--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
>
> 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 lo
--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
>
> Sounds like a definate "transmitter being heard by receiver with
audio
> delay" to me.
>
> Is it always that quieting? Wow
I never hear it as loud (apparent deviation change?) as the 73.
On the 73 it's a grab th
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
-
> <--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
I had it zipped, but it didn't make much gain. Not too surprising I
guess.
Yahoo! Groups Links
<*> To visit your group on the web, go
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
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
--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
>
> 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
It's
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 emai
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
> So, where I can hear the wav file?
Can I email it somewhere?
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<*> Your use of Yahoo! Groups
> 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,
--- In Repeater-Builder@yahoogroups.com, "Scott Zimmerman"
<[EMAIL PROTECTED]> wrote:
>
> Guys,
>
> I think you're missing one detail here. 146.73 minus 146.85 is
1200 KHz.
> Twice the
> typical 2 meter split of 600Khz.
>
> I'm not sure EXACTLY why it's happening, but the math here has BAD
wr
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
-
--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
>
> 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
powe
--- In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote:
>
> 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?
I can't do that remotely, but commanding the transmitter off does NOT
s
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?
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
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<*> To unsubscribe from this grou
> I agree... A quick verify test would be to bypass the delay
> line.
I've not heard the audio in what I get on the 85.
The 73 only gets it infrequently, so we'd have to wait months for it
to happen.
Although both machines run RC-210 controllers now, the 73 had the
problem with a cat-1000 i
--- 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
>
> I'd be interested in hearing the wav file you recorded, Dave
As would I...
> 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
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