On 2/23/2010 3:11 PM, Jim WB5OXQ inb Waco, TX wrote:
Is it possible the AM signal is getting into an audio stage instead of the
receiver front end? I had that happen once.
Same here. All audio inteconnects are now tiny coax cables at that site
now, installed with shield grounded at ONE
On 2/23/2010 3:11 PM, Jim WB5OXQ inb Waco, TX wrote:
Is it possible the AM signal is getting into an audio stage
instead of the
receiver front end? I had that happen once.
Same here. All audio inteconnects are now tiny coax cables at
that site
now, installed with shield
If it was just audio then there would be no feedback of the PL/DPL
tones, keeping the repeater locked up.
Good advice though.
Jeff DePolo wrote:
On 2/23/2010 3:11 PM, Jim WB5OXQ inb Waco, TX wrote:
Is it possible the AM signal is getting into an audio stage
instead of the
receiver
...@yahoogroups.com] On Behalf Of KT9AC
Sent: Wednesday, February 24, 2010 4:42 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep
UHF repeaters locked up?
If it was just audio then there would be no feedback of the PL/DPL
tones
At 2/23/2010 17:16, you wrote:
Mark et al,
Yes, this repeater is using the Motorola T1500 series bandpass cavities
(two each for rx and tx). I've tried running rx and tx both duplex and
seperate (borrowing a nearby antenna with permission). I can hear the
interference underneath my signal when I'm
I was able to match up the audio coming through the repeater and the
local AM station. My latest theory is that their signal is so strong
that its blowing into the receiver's front end and multiplying/mixing
there (past the bandpass filters and all). They are heterodyne receivers
after all.
: Can the 4th harmonic of 1250 AM keep UHF
repeaters locked up?
I was able to match up the audio coming through the repeater and the
local AM station. My latest theory is that their signal is so strong
that its blowing into the receiver's front end and multiplying/mixing
there (past the bandpass
I'm considering an ICE broadcast high-pass filter that cuts off at
1.8Mhz (model 402). I have an email into them to see how well
it might
work at 448 Mhz.
Tony
Before you spend any real money, you might just try a shorted quarterwave
stub. If you want, I can make one up quick and see
How about 1.25 MHz RF coming down the outer jacket of the UHF antenna
and into the ground of the system? You have about 200 ft or so of
coax? Try a mag mount antenna temporarily.
Not really sure how you'd cure that though. Not sure if snap on RF
beads would work on coax with a signal going in
Of DCFluX
Sent: Wednesday, 24 February 2010 09:35 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF
repeaters locked up?
How about 1.25 MHz RF coming down the outer jacket of the UHF antenna
and into the ground of the system? You
Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of KT9AC
Sent: Wednesday, 24 February 2010 09:02 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF
repeaters locked up?
I
If you wouldn't mind...that would be interesting to see how it works.
DCFluX wrote:
How about 1.25 MHz RF coming down the outer jacket of the UHF antenna
and into the ground of the system? You have about 200 ft or so of
coax? Try a mag mount antenna temporarily.
Not really sure how you'd
%40yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM
keep UHF repeaters locked up?
I was able to match up the audio coming through the repeater and the
local AM station. My latest theory is that their signal is so strong
that its blowing into the receiver's
How long is your feed line? Do you have any toriods on your feed line, where it
comes in your shack?
To: Repeater-Builder@yahoogroups.com
From: kt...@ameritech.net
Date: Tue, 23 Feb 2010 16:01:45 -0600
Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF
@yahoogroups.com
Sent: Monday, February 22, 2010 8:41 AM
Subject: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF
repeaters locked up?
Had a similiar situation at our site, a station on 106.7 MHz, music on
hang time on many repeaters, intermod runs gave no clue to reason, did all
15 matches
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