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740 KTRH Bleeding On All Police & Fire Channels Is Really Annoying
- Thread starter DJboutit3
- Start date
I can understand that you have some discomfort with this.
How have you determined that KTRH is doing something wrong as opposed to maybe your scanner receiver has a problem?
In your first message you asked that someone (else) please contact KTRH. Have you picked up the phone and contacted them yourself? Properly approached, they might be very helpful in fixing the problem.
450.350 is probably not a "secondary frequency". It has been a few years since I looked at the channel available for this purpose, but that sounds like one of the channels set aside for REMOTE PICKUP UNITS. Radio Stations get a license to use frequencies like this to put two way radios in vehicles so news people in the field and report news stories, or to broadcast a football game from the local high school back to the station, or do the classic "DJ Remotes" from a sponsor's business location.
Does your scanner receiver give you the opportunity to "lock out" a frequency like this?
The other possibility is that 450.350 is a channel available for the audio to go from the studio to the transmitter (STL).
A call to the station engineering staff might help you figure out what 450.350 is, and maybe some suggestions from them on how you keep it out of your scanner.
How have you determined that KTRH is doing something wrong as opposed to maybe your scanner receiver has a problem?
In your first message you asked that someone (else) please contact KTRH. Have you picked up the phone and contacted them yourself? Properly approached, they might be very helpful in fixing the problem.
450.350 is probably not a "secondary frequency". It has been a few years since I looked at the channel available for this purpose, but that sounds like one of the channels set aside for REMOTE PICKUP UNITS. Radio Stations get a license to use frequencies like this to put two way radios in vehicles so news people in the field and report news stories, or to broadcast a football game from the local high school back to the station, or do the classic "DJ Remotes" from a sponsor's business location.
Does your scanner receiver give you the opportunity to "lock out" a frequency like this?
The other possibility is that 450.350 is a channel available for the audio to go from the studio to the transmitter (STL).
A call to the station engineering staff might help you figure out what 450.350 is, and maybe some suggestions from them on how you keep it out of your scanner.
The range 450-451MHz (and 455-456) is indeed a broadcast auxiliary band. I don't know of anyone using it for STL (and don't *think* it's legal to run a STL there) but it's commonly used, as GRC suggests, for remote pickups. Here in Nashville, at least at one time a frequency in that band was used for traffic helicopters to transmit their reports to the studio. That would match the "every 15 to 30 min" schedule Dj is reporting. (Dj, does this happen only when KTRH is broadcasting from outside their studio? -- traffic reports, live remote from City Hall, something like that?)
I've also heard of these frequencies being used for "IFB" -- to feed the station's programming to a reporter at a remote location, with the ability to interrupt it to give the reporter cues. You'll normally hear a simulcast of the station's programming, but if you listen carefully it may disappear for just a second, as someone tells the reporter to begin speaking.
Dj, FYI it is VERY VERY VERY VERY VERY unusual for an AM station's transmitter to bleed into a VHF/UHF transmission like those tuned by scanners. In 40 years I've *never* heard of it happening. (and vice-versa: a UHF transmission simply *does not* bleed into AM transmissions) You might also take into account the schedule of the transmissions. KTRH of course is on the air 24/7, so if their transmitter had a spurious emission on the wrong frequency, it would *probably* be there all the time. (although some faults can indeed be intermittent)
The other cue here is the severity of the issue. If police & fire communications were really being wiped out, I think you can reasonably assume *something* would be done about it, post-haste -- the situation would not persist past a few hours. Almost certainly, once KTRH became aware of the situation the offending transmitter would be shut down. In the very unlikely case they didn't voluntarily fix it, this would become a news story & you'd have heard about it at least on TV & in the newspaper, if not on KTRH's radio competition. And, the FCC would be brought into the mix.
Point being, if public safety agencies were having trouble communicating, you'd have heard about it. (or the problem would have disappeared almost instantly)
Which leads me to believe either GRC's suggestion (that you have 450.35 programmed into your scanner, and it's behaving exactly as designed) is true, or you live very close to either KTRH's studio, or their transmitter, and your scanner is overloading.
I've also heard of these frequencies being used for "IFB" -- to feed the station's programming to a reporter at a remote location, with the ability to interrupt it to give the reporter cues. You'll normally hear a simulcast of the station's programming, but if you listen carefully it may disappear for just a second, as someone tells the reporter to begin speaking.
Dj, FYI it is VERY VERY VERY VERY VERY unusual for an AM station's transmitter to bleed into a VHF/UHF transmission like those tuned by scanners. In 40 years I've *never* heard of it happening. (and vice-versa: a UHF transmission simply *does not* bleed into AM transmissions) You might also take into account the schedule of the transmissions. KTRH of course is on the air 24/7, so if their transmitter had a spurious emission on the wrong frequency, it would *probably* be there all the time. (although some faults can indeed be intermittent)
The other cue here is the severity of the issue. If police & fire communications were really being wiped out, I think you can reasonably assume *something* would be done about it, post-haste -- the situation would not persist past a few hours. Almost certainly, once KTRH became aware of the situation the offending transmitter would be shut down. In the very unlikely case they didn't voluntarily fix it, this would become a news story & you'd have heard about it at least on TV & in the newspaper, if not on KTRH's radio competition. And, the FCC would be brought into the mix.
Point being, if public safety agencies were having trouble communicating, you'd have heard about it. (or the problem would have disappeared almost instantly)
Which leads me to believe either GRC's suggestion (that you have 450.35 programmed into your scanner, and it's behaving exactly as designed) is true, or you live very close to either KTRH's studio, or their transmitter, and your scanner is overloading.
DJboutit3 said:I found out it is 450.350 there secondary frequency bleeding on my scanner
Perhaps you live very close to the 450.350 transmitter and/or they have increased the output power of it. Or changed perhaps its xmtr location. Sounds like overload on your scanner.
Old Chicago
- Status
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