Thank you Kevin. I understand and appreciate
the problem you describe.
However, I am not trying to download at 2 Meg;
indeed the VOIP app is very happy on a 44 K
dial-up with the other Internet provider.
There seems to be adequate bandwidth, as I
can load my cable connection with additional
Mike,
My reply was not in response to your packet loss, I was trying to
describe other effects that had been brought up in the discussion by
Paul. I'm not saying your provider isn't tampering with packets or IP's
destine for competitors VoIP servers. What I am saying is depending on
the
OK guys... I thought I could figure this out on my own, but I was
wrong. I could use some wisdom from the group! I have been chasing a
stubborn case of duplex noise for a long time without success.
The 2 meter repeater will run clean all day at 100 watts (or any
lower power level) into a
Suspect any other nearby fiberglass antenna in your search.
Chuck
WB2EDV
- Original Message -
From: Paul N1BUG paul_n1...@myfairpoint.net
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 12, 2009 12:09 PM
Subject: [Repeater-Builder] Quieting duplex noise from a tower
OK
Thanks Chuck. What would you consider nearby? There is one
fiberglass antenna on a tower 60 feet away. It was new when it went
up 2 years ago, but my problem existed before that tower/antenna
went up.
Aside from that the nearest other fiberglass antenna (or antenna of
any kind) is 250 feet
Three different antennas (all DB or Sinclair, two of them NEW) have
been tried with no significant change. The feedline (Andrew
LDF5-50A) has been swapped out once with no change.
I think that leaves the tower or other nearby metal structures as
the prime suspects.
You didn't give a
Ya gotta watch out for those amateur radio operators.
http://www.radioworld.com/article/76094
Also, there's a link to the ARRL's web site about Laura Smith who took over for
Riley Hollingsworth and other interesting articles concerning locating power
line noises, and even a story about the
Great questions, Jeff. Thanks! Answers below...
Have you looked at the
transmitter output with a spectrum analyzer during the occasions when you
have desense to see if it's getting sloppy?
No. I wanted to but I'm very isolated up here and do not have access
to one.
Have you tried other
What type of power supply is in your system? Do you have a back up
battery? If so what type of charger is on it? Any other repeater
systems in close proximity?
Are you using a preamp? If so, what do you have ahead of it
for filtering,
and/or have you tested without the preamp?
Yes I use a preamp.
DB4062 duplexer and two DB4002B 11 pass cavities, pass cavity loops
set for 1 dB insertion loss each cavity. I tried tightening it up to
3 dB per
Hello All,
Is there any SIMULCAST dealer out there.?
pls contact me off list .
regards
savy.
Oh, it's difficult to say how close close really is, but keep it in mind
if you run out of other fixes. The only test is to remove the suspect
antenna from the site, and that may not be easy. Disconnecting it or
grounding it will not help you diagnose.
Also, I'll ask the dreaded question...
Hello Paul, Worked you a few times many moons ago. I would agree with Jeff
with tapping and slightly causing movement with the repeater up with a weak
signal.
I have before experiened both an antenna (stationmaster) with internal
broken joint which caused severe noise and desense but
Have you tried putting one or more pass cavities on the transmitter? It's
more of a longshot, but if there's something strong coming back down your
feedline it could be getting to your PA resulting in intermod. The problem
would come and go with the strong signal obviously, and only when
Hi Randy,
I remember working you on 2 meters.
That is very interesting. I tried bonding all the joints. If
anything it actually seemed to make things worse!? I have been
seriously thinking about Phillystran. It's a big expense not knowing
for sure where the problem lies, but the only way to
Also, I'll ask the dreaded question... You are not using any foil/braid coax
(LMR-400, 9913, etc.) for any jumpers are you?
Nope, won't allow the stuff near my repeaters! grin
LDF5-50A runs up the tower, RG-214 mil spec double silver shield for
all jumpers.
Paul
What type of power supply is in your system? Do you have a back up
battery? If so what type of charger is on it? Any other repeater
systems in close proximity?
There is a backup battery which is float charged from the 13.8V DC
power supply. Presently the supply on duty is a homebrew beast of
Samething here in NJ. the Club put all new Db Antennas On the 100 foot tower.
New Feedline. still had the noise...new grounding system. all sections bonded.
still Noise. changed the guy cables to Phillystrand. Problem went away
--- On Thu, 3/12/09, Chuck Kelsey wb2...@roadrunner.com wrote:
Were they starting to show rust?
Chuck
WB2EDV
- Original Message -
From: neal Newman cozy...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 12, 2009 4:55 PM
Subject: Re: [Repeater-Builder] Quieting duplex noise from a tower
Samething here in NJ. the Club put
Hi, all,
I am restoring an old Moto L43GGB desktop base. (OK, stop laughing.) So, I
would like to find a manual, if someone has one collecting dust in an old box
and would wish to sell it. Contact me direct at (my call) (at) verizon (dot)
net. Thanks
Dennis Bridgeman KCØFWN
Bridgeman
Thanks for the info Eric. I first learned of these amps from the
Repeater-Builder genesis page. I am going to use it with my Genesis
convertacom. I never knew they were used as far back as the MX300 and MT500
radios. That is interesting.
Again, thanks for the info. I appreciate the model
Im having the same issue with my repeater on a 100 ft tower guyed with 3/16
In a message dated 3/12/2009 3:39:30 P.M. Central Daylight Time,
paul_n1...@myfairpoint.net writes:
Hi Randy,
I remember working you on 2 meters.
That is very interesting. I tried bonding all the joints.
Sorry, I have the same problem with my repeater on a 100 foot tower guyed
with 3/16 cable. It seems when the temp drops below 60 F I get a squeal in the
RX side of my repeater. I can shake the tower when its doing it and it will
go away for a few minutes. We went up and grounded the
was the
generation source. We changed the guys to Phillystran and never
had another issue.
_
Need a job? Find
http://yellowpages.aol.com/search?query=employment_agenciesncid=emlcntusye
lp0005 employment help in your area.
__ NOD32 3931 (20090312) Information
Anyone have a pdf for a Zetron Model 35 - unit
i need book to set up
and program.
for a 6mtr repeater in the uk gb3ct thanks from chris
.
__ NOD32 3931 (20090312) Information __
This message was checked by NOD32 antivirus system.
http://www.eset.com
Don Kupferschmidt d...@... wrote:
Ya gotta watch out for those amateur radio operators.
http://www.radioworld.com/article/76094
Video at: http://www.kptm.com/Global/story.asp?S=9911221nav=menu606_2#
I suspect I'm having similar issues on my tower - Nello 25N, 150' tall, 3/16
EHS, big grips grounding at tower base - guywires are bonded together and
grounded to a single pole at each guy point).
Do you mean connecting the guywires back to the tower itself, or connecting the
towerbase to
This fixes the RF problem, but creates a new one. the guy anchors can now
explode in a direct lightning strike if your shorting wires don't give up
first. if the lightning thinks the path down the guy wire looks better
than others.
Nate WY0X
From: Repeater-Builder@yahoogroups.com
You also have to be careful when generalizing - Comcast here locally is
actually the old ATT Broadband network, upgraded many times by Comcast
after they purchased it.
But the base technologies installed in each Comcast service area are NOT
the same.
(I can tell for sure that Comcast here
Albert,
I don't have the manual for that unit, but I can state with some confidence
that you can terminate the output with a wattmeter and feed the input with
one or two watts from a handheld at the desired frequency, and tune for
maximum output. If the power output does not pass through a peak
I've been looking at phillystran for many years now, but never implemented it.
I've used 3/16 EHS with associated hardware. I too, have issues with noise.
Any others out there who have, and can give any ideas on how to use it for
guying a tower? Hardware used, hints and kinks?
Or are there
There's other things to look at... have you looked at your Comcast router
(in the admin menus) and seen what the received signal/noise ratio is at
your location, and what upstream power it's having to use to reach them?
I had a problem when I first set up the Comcast line into the house where
I've had NO trouble at all passing VoIP through Canopy.
You might want to investigate ways to bring your links in over the Canopy/IP
system at the site, Mark.
Two of our repeater sites have EchoIRLP nodes, serviced off of Canopy and/or
Trango Wireless gear. Works fine. No serious latency
For those that trust these public things and don't think the ISP's know
we're using them (and thus, open their connections to JUST these places,
wide-open.)
www.speedtest.net is a cool one that works well.
Nate
From: Repeater-Builder@yahoogroups.com
Nate,
If they have their feces integrated enough to treat commercial customers
better, that only proves they're clueless about branding.
I considered upgrading to their commercial-grade products, but saw little
reason to believe that it would improve reliability or customer service. I
wonder
--- On Thu, 3/12/09, neal Newman cozy...@yahoo.com wrote:
From: neal Newman cozy...@yahoo.com
Subject: Re: [Repeater-Builder] Quieting duplex noise from a tower
To: Repeater-Builder@yahoogroups.com
Date: Thursday, March 12, 2009, 4:55 PM
Samething here in NJ. the Club put all new Db
The tower is all steel so why wont the lightning hit the entire tower and
guy ropes .Wether they are shorted to the tower or not a lightning hit will
run through all the setup.I have had a VHF antenna hit with lightning and
the tower was a1 ok and the antenna was blowen to pieces .All commercial
At 03:15 PM 03/12/09, you wrote:
Anyone have a pdf for a Zetron Model 35 - unit
i need book to set up
and program.
for a 6mtr repeater in the uk gb3ct thanks from chris
The brochure and the owners manual are on the repeater-builder web site.
We are still looking for the service manual.
Mike
Don, Its pretty straight forward. They have a size equivilent to the 3/16 in
mechanical strength, and you should use the Phillystran preforms and timble
sleeves. Make sure not going thru trees or other such things that could rub
against it. Hope that answers it. But we had them up for 12 or
At 3/12/2009 13:19, you wrote:
When you changed out antennas and heliax, I presume you replaced any
topside
jumpers as well?
Topside jumper and the jumper between duplexer and feedline were
replaced.
What kind of jumpers?
Bob NO6B
Hell, if half the MOTOROLA-INSTALLED towers around here were built to
their own specs, I'd be impressed.
Most of them are using screw in guy anchors with no dead-mans, and are
a good dust-up of wind away from falling over.
Haven't seen a Moto-tower yet that met R-56 around here! You gotta
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