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How to fix Intermod on Weather Radio?

I have a Radio Shack NOAA Weather Radio (with S.A.M.E. coding etc...). It's a nice radio BUT, there is a local NewsTalk station that frequently dumps their audio onto 161.640MHz and that totally wipes out my NWR reception on 162.550 MHz to the point where I have no weather audio and do NOT recieve any weather radio warnings. The 161.64 transmitter is just 3 miles away (due West) and the the NWR transmitter on 162.55 is 12 miles away - also due West. Any suggestions on how to receive ONLY the NWR signal on 162.55MHz? Not even a directional yagi antenna works as the stations are too close in line with each other.
My guess is that the WX radio's I.F. is 455KHz and 2x 455 = 0.91MHz,
so 161.640 + 0.91 = 162.550 MHz?? Anyway you can think of to restore weather service to the radio without the news/talk station interference?
 
> I have a Radio Shack NOAA Weather Radio (with S.A.M.E.
> coding etc...). It's a nice radio BUT, there is a local
> NewsTalk station that frequently dumps their audio onto
> 161.640MHz and that totally wipes out my NWR reception on
> 162.550 MHz to the point where I have no weather audio and
> do NOT recieve any weather radio warnings. The 161.64
> transmitter is just 3 miles away (due West) and the the NWR
> transmitter on 162.55 is 12 miles away - also due West. Any
> suggestions on how to receive ONLY the NWR signal on
> 162.55MHz? Not even a directional yagi antenna works as the
> stations are too close in line with each other.
> My guess is that the WX radio's I.F. is 455KHz and 2x 455 =
> 0.91MHz,
> so 161.640 + 0.91 = 162.550 MHz?? Anyway you can think of
> to restore weather service to the radio without the
> news/talk station interference?
>
Hi,

New radio maybe :)

Seriously, all the alternatives, save 2, would require more expense and effort than getting another radio.

First alternative is to find another weather frequency. In many places there are several weather service trtansmitters than can be heard at one time on different frequenices. Here in LA, if you can't get LA you can get Santa Ana, or Ventura. They carry mostly the same alerts.

Second chioce is to put an attenuator (say 6-10 db) in the antenna feed line between the antenna line and the radio. That may cut down the front end overmodulation and still get the signal you are interested through. I am not sure if Radio Shack carries them but a ham radio or good electronics store will.

Third choice, for the technically inclined, is to take the front end tuning capacitor out of an old FM radio and wind a really hi-Q coil and tune it to the weather frequency of interest and put it on the front end between the antenna and the radio.

Fourth choice is a tuned pre-map on the front end. That will be about as expensive as a new radio.

John
 
Yeah, a much better quality receiver, or a new wx freq, and one option I use here in sacramento, is that the NWS uplinks from the local office on 410.575mhz. Widely heard in the area.. a cheaper scanner may do the trick if that is an option where you are..

dave



> > I have a Radio Shack NOAA Weather Radio (with S.A.M.E.
> > coding etc...). It's a nice radio BUT, there is a local
> > NewsTalk station that frequently dumps their audio onto
> > 161.640MHz and that totally wipes out my NWR reception on
> > 162.550 MHz to the point where I have no weather audio and
>
> > do NOT recieve any weather radio warnings. The 161.64
> > transmitter is just 3 miles away (due West) and the the
> NWR
> > transmitter on 162.55 is 12 miles away - also due West.
> Any
> > suggestions on how to receive ONLY the NWR signal on
> > 162.55MHz? Not even a directional yagi antenna works as
> the
> > stations are too close in line with each other.
> > My guess is that the WX radio's I.F. is 455KHz and 2x 455
> =
> > 0.91MHz,
> > so 161.640 + 0.91 = 162.550 MHz?? Anyway you can think of
>
> > to restore weather service to the radio without the
> > news/talk station interference?
> >
> Hi,
>
> New radio maybe :)
>
> Seriously, all the alternatives, save 2, would require more
> expense and effort than getting another radio.
>
> First alternative is to find another weather frequency. In
> many places there are several weather service trtansmitters
> than can be heard at one time on different frequenices. Here
> in LA, if you can't get LA you can get Santa Ana, or
> Ventura. They carry mostly the same alerts.
>
> Second chioce is to put an attenuator (say 6-10 db) in the
> antenna feed line between the antenna line and the radio.
> That may cut down the front end overmodulation and still get
> the signal you are interested through. I am not sure if
> Radio Shack carries them but a ham radio or good electronics
> store will.
>
> Third choice, for the technically inclined, is to take the
> front end tuning capacitor out of an old FM radio and wind a
> really hi-Q coil and tune it to the weather frequency of
> interest and put it on the front end between the antenna and
> the radio.
>
> Fourth choice is a tuned pre-map on the front end. That will
> be about as expensive as a new radio.
>
> John
>
 
Hamtronics has a kit weather radio which is pretty selective.

I use it for EAS less than 175 away from 17 kw FM station.

Somewhat expensive--$100 to$150 depending on what you buy.
 
> Yeah, a much better quality receiver, or a new wx freq, and
> one option I use here in sacramento, is that the NWS uplinks
> from the local office on 410.575mhz. Widely heard in the
> area.. a cheaper scanner may do the trick if that is an
> option where you are..
>
> dave
>
>
>
> > > I have a Radio Shack NOAA Weather Radio (with S.A.M.E.
> > > coding etc...). It's a nice radio BUT, there is a local
>
> > > NewsTalk station that frequently dumps their audio onto
> > > 161.640MHz and that totally wipes out my NWR reception
> on
> > > 162.550 MHz to the point where I have no weather audio
> and
> >
> > > do NOT recieve any weather radio warnings. The 161.64
> > > transmitter is just 3 miles away (due West) and the the
> > NWR
> > > transmitter on 162.55 is 12 miles away - also due West.
>
> > Any
> > > suggestions on how to receive ONLY the NWR signal on
> > > 162.55MHz? Not even a directional yagi antenna works as
>
> > the
> > > stations are too close in line with each other.
> > > My guess is that the WX radio's I.F. is 455KHz and 2x
> 455
> > =
> > > 0.91MHz,
> > > so 161.640 + 0.91 = 162.550 MHz?? Anyway you can think
> of
> >
> > > to restore weather service to the radio without the
> > > news/talk station interference?
> > >
> > Hi,
> >
> > New radio maybe :)
> >
> > Seriously, all the alternatives, save 2, would require
> more
> > expense and effort than getting another radio.
> >
> > First alternative is to find another weather frequency. In
>
> > many places there are several weather service
> trtansmitters
> > than can be heard at one time on different frequenices.
> Here
> > in LA, if you can't get LA you can get Santa Ana, or
> > Ventura. They carry mostly the same alerts.
> >
> > Second chioce is to put an attenuator (say 6-10 db) in the
>
> > antenna feed line between the antenna line and the radio.
> > That may cut down the front end overmodulation and still
> get
> > the signal you are interested through. I am not sure if
> > Radio Shack carries them but a ham radio or good
> electronics
> > store will.
> >
> > Third choice, for the technically inclined, is to take the
>
> > front end tuning capacitor out of an old FM radio and wind
> a
> > really hi-Q coil and tune it to the weather frequency of
> > interest and put it on the front end between the antenna
> and
> > the radio.
> >
> > Fourth choice is a tuned pre-map on the front end. That
> will
> > be about as expensive as a new radio.
> >
> > John
> >
>
I use My sony Walkman as My weather radio ever since my local 1670 AM in Farmers Branch Texas has droped thier Weather coverage. My wlkman model is
SRF-M37V. The radio works great if you are with in about a 15 mile radius of the weather stations transmitter, past that and it's not very good. However it does not have a feature that will alrm you of severe weather. In like using it when I am out riding my bike and need to know if there are any storms close by.<P ID="signature">______________
"I'm a gonna go to hell when I die!" Connan O'Brien

"yay boo, yay boo, it's lots of fun to do, if ya like it holler yay, and if ya don't ya holler boo!"

Connan O'Brien
</P>
 
> I have a Radio Shack NOAA Weather Radio (with S.A.M.E.
> coding etc...). It's a nice radio BUT, there is a local
> NewsTalk station that frequently dumps their audio onto
> 161.640MHz and that totally wipes out my NWR reception on
> 162.550 MHz to the point where I have no weather audio and
> do NOT recieve any weather radio warnings. The 161.64
> transmitter is just 3 miles away (due West) and the the NWR
> transmitter on 162.55 is 12 miles away - also due West. Any
> suggestions on how to receive ONLY the NWR signal on
> 162.55MHz? Not even a directional yagi antenna works as the
> stations are too close in line with each other.
> My guess is that the WX radio's I.F. is 455KHz and 2x 455 =
> 0.91MHz,
> so 161.640 + 0.91 = 162.550 MHz?? Anyway you can think of
> to restore weather service to the radio without the
> news/talk station interference?
>

Yes

Find a 2-way shop with an old motorola or g.e. base station and talk 'em out of the receiver strip, I'd use the RX strip out of a Mastr Pro mobile or base, it's a stand-alone unit, well shielded

add the proper crystal, a 12-volt supply, squelch and volume control and you're in business
 
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