strange transmissions on 507.0875

[w1av]

I have been hearing, at regular intervals strange morse code transmissions, usually in 1, 2 or 3 letter and/or number groups. The frequency is 507.0875. I am in Cranston using a small bearcat 350a scanner with just the little whip antenna. The transmissions are loud and clear and sound local. These transmission come every 15 to 20 minutes roughly. I did a search on here and found nothing for that frequency.

 

[nd5y]

There is no land mobile use of TV channel 20 506-512 MHz in or near RI. The closest area is Philadelphia so unless there was a tropo opening you were probably picking up an image of some other frequency. Do you hear this all the time?

 

[dlwtrunked]

I have been hearing, at regular intervals strange morse code transmissions, usually in 1, 2 or 3 letter and/or number groups. The frequency is 507.0875. I am in Cranston using a small bearcat 350a scanner with just the little whip antenna. The transmissions are loud and clear and sound local. These transmission come every 15 to 20 minutes roughly. I did a search on here and found nothing for that frequency.

Do you have a recording?

 

[ipfd320]

Looking Up the Freq,s There are 7 Licenses--

1 KJC625---------LOS ANGELES, CITY OF-----------0001536242------PW--Active----02/13/2025
2 WII365----------GLOUCESTER, COUNTY OF------0003324019------PW--Active----05/02/2024
3 WPLT625-------LOS ANGELES, CITY OF-----------0001536242------PW--Active----01/29/2023
4 WPMW805-----MONTGOMERY, COUNTY OF----0003233269------PW--Active----03/02/2024
5 WPQZ737------JACKSON, TOWNSHIP OF--------0020103925------YW--Active----12/20/2020
6 WPRJ338-------LOS ANGELES, CITY OF----------0001536242------PW--Active----10/12/2025
7 WQWH729-----LOS ANGELES, CITY OF-----------0001536242-----PW--Active-----08/26/2025

 

[cg]

I would guess an image that is being created in the scanner. Every 15 minutes a local business repeater does a CWID and another fairly busy channel mix creating an image but not matching long enough to get a 6 or 7 character ID.

chris

 

[ecps92]

The older Bearcats had an image issue and it could be used to our advange
ie: 483.5375 many of us would get TV 38 Audio, so add 21.4 [I think this was the math]
and we can now program 504.9875 and get Quincy Fire without the TV 38 audio

As the T-Band here in Boston [Parts of RI fall under Boston per the FCC]
is only 470-473 and 482-485, the 507.0875 is a little outside of our allocations.
See notes at the bottom of Television Frequencies - The RadioReference Wiki

If the UHF Band was open [aka skip, tropo etc]
VHF Propagation Map
which VHF has been rather nice of late

You could be hearing NY/NJ
Not too up on the 350a, but if it can do PL, see what tone it displays.

I have been hearing, at regular intervals strange morse code transmissions, usually in 1, 2 or 3 letter and/or number groups. The frequency is 507.0875. I am in Cranston using a small bearcat 350a scanner with just the little whip antenna. The transmissions are loud and clear and sound local. These transmission come every 15 to 20 minutes roughly. I did a search on here and found nothing for that frequency.

 

[w1av]

strange transmission....

Yeah now that it was mentioned here, this transmission is probably an image.....as far as I know there isn't anybody using frequencies in that area (500 mhz) around here. I am scanning now to see if I can hear it again. I will try to write down the CW characters....

 

[W1KNE]

506-512 is used by WCVB in Boston for transmission. You'll hear mostly noise on those frequencies around here. There was a lot of tropospheric ducting the last two days, so you probably got an image from another frequency coming in via the trop.