At 05:40 PM 03/13/09, you wrote:
There seems to be lots of opinions , how about a simple find
the problem fella's ?
I recently was asked to find some noise on a similar
situation . We fired up my promax 577 tuned around a little
whilst climbing and found the problem making the fix asy (
Aircraft handhelds are AM in the 120MHz region. Some handheld
scanners do aircraft AM just fine.
Ah! Somehow that hadn't occurred to me. The president of our club is
a pilot and has one.
I guess there are no weak, constant signals in the aircraft band (?)
but maybe it's not necessary. I
Paul,
Actually, if you're near enough to the airport, you should be able to hear the
ATIS (Automatic Termininal Information System) broadcast. It repeats
airfield/weather information continously. That'd be a constant (although
perhaps not weak) signal in the aircraft band.
Mike
WM4B
And, if it will tune the 108 MHz to 118 MHz band,
you could receive a nearby VOR.
mwbese...@cox.net wrote:
Paul,
Actually, if you're near enough to the airport, you should be able to
hear the ATIS (Automatic Termininal Information System) broadcast. It
repeats airfield/weather
: Re: [Repeater-Builder] Re: Quieting duplex noise from a tower
Aircraft handhelds are AM in the 120MHz region. Some handheld
scanners do aircraft AM just fine.
Ah! Somehow that hadn't occurred to me. The president of our club is
a pilot and has one.
I guess there are no weak, constant
.
Chuck
WB2EDV
- Original Message -
From: Paul N1BUG paul_n1...@myfairpoint.net
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 18, 2009 8:05 AM
Subject: Re: [Repeater-Builder] Re: Quieting duplex noise from a tower
Aircraft handhelds are AM in the 120MHz region
Date: Wed, 18 Mar 2009 08:10:29 -0400
Subject: Re: [Repeater-Builder] Re: Quieting duplex noise from a tower
Paul,
Actually, if you're near enough to the airport, you should be able to hear the
ATIS (Automatic Termininal Information System) broadcast. It repeats
airfield/weather information
Aircraft handhelds are AM in the 120MHz region. Some handheld
scanners do aircraft AM just fine.
My VX5R handheld does AM over much/most? of it's receive coverage. So does my
Icom IC2350 mobile rig. The aircraft band should work well, but there's
nothing magical or special about sniffing
-Builder] Re: Quieting duplex noise from a tower
To: Repeater-Builder@yahoogroups.com
Date: Friday, March 13, 2009, 9:22 PM
Yeah, I was going to suggest a simplified version of
what you're talking
about - climb the tower with a little AM
transistor radio tuned to a weak
station, key
Replace all electrical fixtures, i had a site they was was using sub standard
fixtures that was creating all sorts of havoc. and this solved all duplex
issues.
Ryan n3ssl
structure) replacing
them with stainless instead of galv...
B
( google the 577 as they are very useful)
To: Repeater-Builder@yahoogroups.com
From: n3...@yahoo.com
Date: Sat, 14 Mar 2009 00:04:14 +
Subject: [Repeater-Builder] Re: Quieting duplex noise from a tower
There seems to be lots of opinions , how about a simple find
the problem fella's ?
I recently was asked to find some noise on a similar
situation . We fired up my promax 577 tuned around a little
whilst climbing and found the problem making the fix asy (
some wire clamps on the
Yeah, I was going to suggest a simplified version of what you're talking
about - climb the tower with a little AM transistor radio tuned to a weak
station, key the transmitter on and off, and see if you can find a noise
hot spot or anything that when moved or vibrated causes the noise level to
Should do the trick although it might take som more effort... maybe your
neighbour works for a satellite or comms company , couple of beers ?
To: Repeater-Builder@yahoogroups.com
From: j...@broadsci.com
Date: Fri, 13 Mar 2009 20:40:57 -0400
Subject: RE: [Repeater-Builder] Re: Quieting duplex
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
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
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
...@yahoogroups.com] On Behalf Of hankjr...@aol.com
Sent: Thursday, March 12, 2009 4:59 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Quieting duplex noise from a tower
Sorry, I have the same problem with my repeater on a 100 foot tower guyed
with 3/16 cable. It seems when
---Original Message---
From: Michael Ryan
Date: 03/13/09 08:13:06
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Quieting duplex noise from a tower
I have far less experience with this sort of thing than most anyone here but
IMHO towers that are guyed SHOULD have insulators
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
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerinvale
Sent: Thursday, March 12, 2009 4:28 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Quieting duplex noise from a tower
?
Or are there docs or web sites that can be referred to?
TIA,
Don, KD9PT
- Original Message -
From: Nate Duehr
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 12, 2009 7:18 PM
Subject: RE: [Repeater-Builder] Re: Quieting duplex noise from a tower
This fixes the RF problem
: Nate Duehr
Date: 13/03/2009 10:18:50
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Quieting duplex noise from a tower
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 dont give up
: Thursday, March 12, 2009 7:18 PM
Subject: RE: [Repeater-Builder] Re: Quieting duplex noise from a tower
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
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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