Howdy group.
I have a Motorola MSR2000 repeater on the ham bands that I maintain.
VHF 147.32 in Austin (Oak Hill)Texas.
It has developed a hum on the receive signal. I know it's the receiver
as there is no hum when the machine ID's with no input from the
receiver. The hum has been getting worse
It just doesn't know the words ;-p
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of Bill
Howdy group.
I have a Motorola MSR2000 repeater on the ham bands that I maintain.
VHF 147.32 in Austin (Oak Hill)Texas.
It has developed a hum on the receive
Does the receiver share a power source with the rest of the repeater, or is
it separate? Our machine has several internal sources of power. each
feeding a different device (transmitter, receiver, controller, etc.) So,
it's possible for the power supply to develop a bad filter on the receiver
Bill,
AC hum that begins spontaneously is sometimes due to an audio cable that is
loose, breaking the shield connection.
Another possibility is the failure of a filter capacitor inside a power
supply feeding the IRLP device. Ideally, all sources of audio feeding the
repeater and/or the
Thanks for the input(s). Here is a link to the repeater info
with a photo. I think it would be a single power supply.
http://www.n5ztw.com/W5MOT.htm
The hum is not exclusive to the IRLP linking radio as it is
present when the IRLP rig is off. The IRLP linking rig and
internet connection are about
At one point I had read a number for figuring out the gain you get by
increasing the height. Of course at the moment I'm unable to locate that.
ie: If I move the same antenna (VHF 2m) up a hill and gain 100' of
elevation, but it costs me the line loss (300'), did I really gain
anything.
I've seen this before on an MSR-2000 or two... or twenty...
It might be related to the added interconnection cables.
What kind of wire are you using from the receiver to what-
ever external devices (repeater controller) you have connected?
The black multi conductor round wire found and used
Chuck,
It's just not that simple. If the earth were completely flat, you would get
some increase in range- but there are many other factors to consider besides
transmission line loss. Most propagation calculation programs consider
free-space loss, diffraction loss, and Fresnel loss separately.
Thanks Skipp I will take a good look at the audio cables.
This configuration has worked well for many years and we
added IRLP a year ago but it is external.
The hum is not present when you kick over the repeater and
let it ID.
It is only present when a signal comes in on the receiver.
So first
Another reason to consider the terrain is that if you raise it up more, will
you be overshooting some of the users close in under (in the cone) of the
antenna (ie: needing downtilt).
my $.02 worth,
Mike KB5FLX
- Original Message -
From: Eric Lemmon
To:
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Thanks Skipp I will take a good look at the audio cables.
This configuration has worked well for many years and we
added IRLP a year ago but it is external.
Consider any added wiring to/from the back plane external
devices.
The hum is not present
At one point I had read a number for figuring out the gain you get by
increasing the height. Of course at the moment I'm unable to
locate that.
ie: If I move the same antenna (VHF 2m) up a hill and gain 100' of
elevation, but it costs me the line loss (300'), did I really gain
Jeff -
Where can you experience a situation where you have line-of-sight, but poor
fresnel clearance, and have no communications path (assume VHF and UHF, not
microwave)? Is there ever a case?
We've got a link path that an analysis indicates absolutely no way yet it
works just fine (UHF). The
Bill,
Also check for any new, continuous carriers which might have entered the
environment. If you have a ground loop in the cabling, and it happens to
resonate near the frequency of a new signal in the area, that signal may have
exposed a flaw in the harness which has always existed and
Where can you experience a situation where you have
line-of-sight, but poor
fresnel clearance, and have no communications path (assume
VHF and UHF, not
microwave)? Is there ever a case?
A couple of simple examples:
1. If you have an exactly-wrong height as far as Fresnel clearance
Kind of like pulling teeth here... It would be nice to know
what results happened with what (repeater) items were inserted
or removed.
Basically it happens in all configurations. Some of things I've tried
have been receiver on the top antenna, TX on the bottom, going through
the duplexer,
Hello I hope Everyone is doing Well , Some things We do not like
talking about Except with our Ham friends Privately and I am sure
My Topic is one that may effect all of us
But I have a Question and I have got a lot of Opinions , But I Need
to know if Anyone Has the Real answer and can Give
Don,
There are many reasons that a person has to register as an offender. some of
which I believe are questionable. Without knowing the specifics, I will not
comment. If you believe there is a concern over their activities you have
several options, including contacting the local
__,_._,_ Thanks Mike , Points well taken As Everyone know we live in a
Society where Everyone is suing someone , That is why I was trying to
find out a actual FCC Ruling on this if Any
73 De Don KA9QJG
__
There are reasons one could be required to register as a sex offender some of
which would have nothing to do with a relationship with young people. If you
hear any conversations on your repeater you deem unfit you have the right to
ask the party not to use your repeater. That being said
I think it depends on location but generally, offenders are PROFOTIBED from
making with minors, etc. I have heard of prosucations when they made internet
contact. I would think HAM radio would be along the same lines. I would report
them to the proper agency them report them to the FCC. Maybe
Jim,
I don't think a lawsuit would go far, since the FCC has upheld the rights of
repeater groups to ban pretty much whomever they want from using their
repeaters.
Nonetheless, as someone else pointed out, everybody in America wants to sue
somebody and it seems like the defendant is
At 06:49 PM 8/9/2008, you wrote:
I think it depends on location but generally, offenders are
PROFOTIBED from making with minors, etc. I have heard of
prosucations when they made internet contact. I would think HAM
radio would be along the same lines. I would report them to the
proper agency
I re-seated the Squelch Gate board.
Problem gone.
I wish they were all this easy.
Thanks for all the advice.
Bill N5ZTW
I watched a cable TV system installation on a 300 ft tower many years back, and
it was interesting to see where the receive antennas were placed. We had
channels 4,5,8,11, and 13.
The tech took a portable antenna and receiver up the tower and watched the
signal strength for each channel as he
I just tried to program a Icom F-121 VHF radio. I have the the proper cable
and the CS-F100 software. When I tried to clone the info into the radio it
started the process ok. When it gets almost to the end it stops and says I
new a newer version of the software. A google search does not reveal
Don,
You may want to do a search of the FCC's website for infractions and the
like; as I remember a number of years ago the FCC shut down a pirate
broadcast station somewhere in the U.S. and the person that was involved was
a ham.
I'm not sure of the final disposition of the case, but I do
Found newer version of the software and downloaded. Problem solved. Guess I
should have looked a little harder on google first!
Thanks,
Mike KA2NDW
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Mike DeWaele
Sent: Saturday, August 09,
At 8/9/2008 17:58, you wrote:
I watched a cable TV system installation on a 300 ft tower many years
back, and it was interesting to see where the receive antennas were
placed. We had channels 4,5,8,11, and 13.
The tech took a portable antenna and receiver up the tower and watched the
signal
Their offender status doesn't matter. You can ban anyone from your
repeater for any reason at any time. Do what was suggested - write them
a registered letter and CC the FCC. Then, if they still use your
repeater the FCC may be able to take action against them.
I can't think of any rule that
That statement implies that they have a civil right to use your station.
The FCC is quite clear that you are responsible for your own station,
and you have the right to say who uses or does not use your repeater.
They have no right to force you to allow them to use your repeater.
Joe M.
Jim
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