Hi Mike,
Since the pager is multi-channel, we were thinking of the DCI window filter on
the pager. Then adding what ever else is needed on our ham receiver.
On inverting either of the antennas, no chance. The paging antenna is an 8 bay
that is about 40 feet in length. We'd have to drop 60 feet
Hi Mike,
Excellent information. It's a new pager and it's a two channel system, no cans.
We're the ham guys and have been there for about 5 years, but only as guests.
Yes, there is a non-interference clause, but we do not want to go that route.
We're all on good speaking terms (tower owner,
The widow filter on the paging transmitter or on your repeater?
DCI will do custom designs for special situations, and yours
certainly qualifies.
If the DCI is going on yours, make sure and plan ahead - I was
told about a guy who had to add a DCI box to his system to
keep out a new-to-the-site
Thanks for the input. I don't think that is possible (read practical) since
it's a two channel pager. The two pager frequencies are about 500 KHz apart. So
there is only one PA and one output in the pager box.
I may have to call DCI or someone to get a window filter.
Dwayne Kincaid
--- In
Joe,
Its a new pager that switches frequency, just recently put up. Fortunately,
we're all on good terms and yes, we're a freebie ham group. So that's why we
thought about a window filter for them to get it down 30 or 40 db and we'll do
the rest on our end.
The original question remains...
-
From: Mike Besemer (WM4B)
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 24, 2010 11:01 PM
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
You're reading my mind, Gary!
73,
Mike
WM4B
--- In Repeater-Builder@yahoogroups.com, Kris Kirby k...@... wrote:
On Sat, 24 Apr 2010, Mike Besemer (WM4B) wrote:
The issue disappeared over the winter months. If it's a hot, sunny
day you can be sure the problem will be present. A hot, cloudy day is
also a fairly good bet. Also,
So has anyone conducted tests to determine if it is a mixing problem ?
sig gen and proximity ?
To: Repeater-Builder@yahoogroups.com
From: mwbese...@cox.net
Date: Sat, 24 Apr 2010 17:28:41 +
Subject: [Repeater-Builder] Re: Pager Interference Revisited
Elaborate please Barry. you lost me.
Mike
WM4B
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Barry
Sent: Saturday, April 24, 2010 2:36 PM
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
Portable sig gen into the repeater site and swing it about the place in various
locations , sort of a revrse hammer to the power poles
if it is coax introduced you quickly confirm your suspicions but if its ac
introduced or grounding or some other oddity it usually helps to eliminate the
Of Barry
Sent: Saturday, April 24, 2010 2:44 PM
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
Portable sig gen into the repeater site and swing it about the place in
various locations , sort of a revrse hammer to the power poles
How close is Robins AFB? Maybe?
Chuck
WB2EDV
- Original Message -
From: Mike Besemer (WM4B)
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 24, 2010 2:48 PM
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
Given that the interference
...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Saturday, April 24, 2010 3:16 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Pager Interference Revisited
How close is Robins AFB? Maybe?
Chuck
WB2EDV
- Original Message -
From: Mike Besemer (WM4B
equipmet do you ahve available?
Is the repeater in a poplulated area or remote?
Milt
N3LTQ
- Original Message -
From: Mike Besemer (WM4B)
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 24, 2010 3:36 PM
Subject: RE: [Repeater-Builder] Re: Pager Interference
To: Repeater-Builder@yahoogroups.com
Subject: e: [Repeater-Builder] Re: Pager Interference Revisited
Mike,
Does the interfering signal come and go or is it constant?
Does it have any AC component; ie buzz or hum at 60Hz, 120Hz, etc., or any
raw buzzing noise?
Are there any broiadcast TV
How do the paging signals get to the three transmitters? Wireline? 72
MHz link? 930 MHz link?
Matthew Kaufman
1 is wireline, two are satellite.
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Matthew Kaufman
Sent: Saturday, April 24, 2010 4:44 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Pager Interference Revisited
How do
Yes, but odds are good you are dealing with three different problems -
similar mechanisms but different participants. Unless of course you can
hear it at all three sites on the same frequency.
On 4/24/2010 1:48 PM, Mike Besemer (WM4B) wrote:
Given that the interference is in three
Mike,
I'm coming to this late, but I have comments and questions.
What type of hardware are the paging transmitters? What are the
repeaters in question, and what type of duplexers, feedline, and
antennas are used?
On 4/24/2010 3:42 PM, Mike Besemer (WM4B) wrote:
Not sure what you mean by
on one of the transmitters you can control things a
bit.
Good luck hunting.
Milt
- Original Message -
From: Mike Besemer (WM4B)
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 24, 2010 4:42 PM
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
hardline and WACOM cans.
Mike
WM4B
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Oz-in-DFW
Sent: Saturday, April 24, 2010 5:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Pager Interference Revisited
@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Pager Interference Revisited
OK, this is probably not going to be an easy one.
I have seen several instances of mast-mounted TV preamps oscillating and
acting as miniature transmitters capable of sweeping over wide swaths of
spectrum
At the risk of mentioning something that's been mentioned and/or checked by you
before...
I believe you said that linking to the sites is not terrestrial RF but wireline
and satellite. Be sure that there isn't some RF linking that's been fogotten
by someone not very familiar with the entire
@yahoogroups.com
Subject: [Repeater-Builder] Re: Pager Interference Revisited
At the risk of mentioning something that's been mentioned and/or checked by
you before...
I believe you said that linking to the sites is not terrestrial RF but
wireline and satellite. Be sure that there isn't some RF linking
As mentioned finding the trigger both with and without the antenna would assist
with a solution , it could be very simple but you need to establish possible
triggers and monitor accordingly with the Spec unit
What Coax or hardline and antenna's are in use for both rpt's ? What happens
when another RX is used at the site? Maybe a IF issue with the Ham rpt's and 72
mhz some thoughts.
Ryan n3ssl
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of n3ssl
Sent: Saturday, April 24, 2010 10:12 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Pager Interference Revisited
What Coax or hardline and antenna's are in use for both rpt's ? What happens
when another RX
, 2010 6:15 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
Problem is Milt, the darn signal level varies like crazy from day to day and
location to location. I can be in a certain spot and receive the signal
very well, drive until
)
Sent: Saturday, April 24, 2010 6:15 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Pager Interference Revisited
Problem is Milt, the darn signal level varies like crazy from day to day and
location to location. I can be in a certain spot and receive the signal
If I have followed the thread correctly, this interference happens from
either of the paging transmitters, not just one or the other.
I would suggest you check to see if there is a TV linear translator very nearby
it could be the source.
--- In Repeater-Builder@yahoogroups.com, Mike Besemer
Have seen this several times where a transmitter went spurious. The worst
have been Johnsons. It's often temperature related, at least the frequency
of the spur. A spectrum analyzer and a directional antenna are your best
tools. A portable scanner is also very handy.
In one case we tracked
We had a wandering spur passing through the Game and Fish statewide frequency
at 151 MHz.
The maintenance engineer had to put the spec-a on the IF section of the
affected receiver [MastrII] to actually see it.
One he saw it, he demodded the signal and it was a local paging outfit on 454
MHz.
: [Repeater-Builder] Re: Pager Interference.
We had a wandering spur passing through the Game and Fish statewide
frequency at 151 MHz.
The maintenance engineer had to put the spec-a on the IF section of the
affected receiver [MastrII] to actually see it.
One he saw it, he demodded the signal
We had a similar problem here years ago, caused by a city fire dispatch
transmitter 30 miles away. It had a spur that we could follow around in
frequency too. Our repeater is on 2M and their transmitter was on 154.37, if I
remember. Their transmitter was the entire cause of the problem; no
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