Annoying intermod of weather station

[bobruzzo]

I have a bcd996p2 and when I scan the Marine band, or freqs between 160-170 I get sporadic bleed thru of the local national weather station on 162.400. That station is located close to me, about 3.25 air miles (see map). I am thinking I might need a filter of some type but no clue what to get. Any suggestions?

 

[62Truck]

you can try turning on IFX on the frequency that you're receiving the intermod on, or try the attenuator. The attenuation is 20db so pulling in weak stations might be a little tough.

 

[K5TUE]

So aggravating.

I believe some of the NOA stations broadcast at a power level approaching 1000 watts. Not all of them do, of course.

Back in the days of pager intermod from 152 mhz, many of us bought and used the PAR Electronics inline notch filters. If I were you I would email them and see if they can tune one up on 162.400 for you. This would put a deep notch of about -50db at 162.400 so your scanner will probably not be bothered by that transmitter any longer.

Please let us know if you have any luck going this route....or whatever solution works for you.

https://www.parelectronics.com/amateur.php

PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts

PAR Electronics Inc. Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave

www.parelectronics.com

 

[bobruzzo]

So aggravating.

I believe some of the NOA stations broadcast at a power level approaching 1000 watts. Not all of them do, of course.

Back in the days of pager intermod from 152 mhz, many of us bought and used the PAR Electronics inline notch filters. If I were you I would email them and see if they can tune one up on 162.400 for you. This would put a deep notch of about -50db at 162.400 so your scanner will probably not be bothered by that transmitter any longer.

Please let us know if you have any luck going this route....or whatever solution works for you.

https://www.parelectronics.com/amateur.php

PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts

PAR Electronics Inc. Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave

www.parelectronics.com

I always thought those stations were low power, only 40 watts. OK I will check into it. Thanks for the info. So you cant tune these units up yourself?

 

[bearcatrp]

I lock out NOAA frequencies when scanning on my 15X. Don't have your radio so not sure that feature exists on your radio. If it does, you will have to lock out again when you turn off/on the radio as its temporary, if its like my 15X.

 

[bobruzzo]

Here is some info on the local WX station at the state airport. It TX with 500 watts.....seems kind of excessive power considering the location. Open flat terrain for a few miles all around.

 

[n2pqq]

I have a bcd996p2 and when I scan the Marine band, or freqs between 160-170 I get sporadic bleed thru of the local national weather station on 162.400. That station is located close to me, about 3.25 air miles (see map). I am thinking I might need a filter of some type but no clue what to get. Any suggestions?

Get a Par electronics filter

PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts

PAR Electronics Inc. Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave

www.parelectronics.com

 

[dlwtrunked]

So aggravating.

I believe some of the NOAA stations broadcast at a power level approaching 1000 watts. Not all of them do, of course.
. If I were you I would email them and see if they can tune one up on 162.400 for you.
...

https://www.parelectronics.com/amateur.php

PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts

PAR Electronics Inc. Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave

www.parelectronics.com

They already have a standard model for the NOAA station frequencies.

 

[K5TUE]

They already have a standard model for the NOAA station frequencies.

That's nice to know...thanks.

 

[K5TUE]

So you cant tune these units up yourself?

I'm sure you can if you have the right equipment...or just a good ear and willing to try.

But if ordering one brand new, why not tell them the frequency you need notched? So then they will send the right unit, already tuned, plug and play.

 

[ind224]

Interesting timing, this thread. In May I wrote to the NWS webmaster regarding at one time the NWS stations list included power out but it was missing when checked recently. Web developer Gary Banks responded and indicated he added the power out.

This URL is nice. Unlike some URL's where I have tried different suffixes to get the same "information" but a different location or number, all you need to do is change the two character state ID and it works. Enjoy!! NWR Stations

This morning I was able to hear and ID stations on all 7 US frequencies.

 

[bobruzzo]

Interesting timing, this thread. In May I wrote to the NWS webmaster regarding at one time the NWS stations list included power out but it was missing when checked recently. Web developer Gary Banks responded and indicated he added the power out.

This URL is nice. Unlike some URL's where I have tried different suffixes to get the same "information" but a different location or number, all you need to do is change the two character state ID and it works. Enjoy!! NWR Stations

This morning I was able to hear and ID stations on all 7 US frequencies.

Wow you got some powerful stations over there!

 

[ind224]

I was surprised to see so many 1K myself!!

 

[K5TUE]

Here is some info on the local WX station at the state airport. It TX with 500 watts.....seems kind of excessive power considering the location. Open flat terrain for a few miles all around.

It's not only the relatively high power level, you have to also assume the ERP (effective radiated power) is many times the number of listed watts, using a typical 6 db or 9 db gain antenna will result in thousands of watts ERP.

Many occurrences of true 'intermod' are the result of two or more strong signals entering your receiver's front end, and 'mixing' to create the resulting audible noise and/or demodulated voice products you hear.

If the intermod is intermittent (see what I did there?) you can assume the 'other' signal source might be another nearby PTT transmitter (such as police, fire, pager, local utilities, local airport VHF AM base station, etc ) and it could be a repeater or base station..or both.

If the intermod is constant then we might assume the 'other' signal is the result of a strong transmitter that is constantly on, such as a local AM, FM or TV station, or maybe another nearby NOA transmitter.

Either way, notching out either signal should result in a noticeable improvement.