I monitor VLF and have discovered a data signal at 300.0 KHz. It seems to
be on continuously. I have searched the FCC databases and searched the web,
but can not find out what this signal is. It is S9+10 in Maryland.

Can anyone tell me what this is or where I can search for info to try to
identify it?

Thanks,

John

John P wrote:

I monitor VLF and have discovered a data signal at 300.0 KHz. It seems to
be on continuously. I have searched the FCC databases and searched the
web,
but can not find out what this signal is. It is S9+10 in Maryland.

Can anyone tell me what this is or where I can search for info to try to
identify it?

Are you near any high voltage transmission lines? Power companies use power
line carrier to pass low bandwidth telemetry and relaying signals on
transmission lines. They typically operate from about 300 kHz down.

--
budr at netride dot net

John P wrote:

I monitor VLF and have discovered a data signal at 300.0 KHz. It seems to
be on continuously. I have searched the FCC databases and searched the
web,
but can not find out what this signal is. It is S9+10 in Maryland.

Can anyone tell me what this is or where I can search for info to try to
identify it?

Are you near any high voltage transmission lines? Power companies use power
line carrier to pass low bandwidth telemetry and relaying signals on
transmission lines. They typically operate from about 300 kHz down.

--
budr at netride dot net

John P wrote:
I monitor VLF and have discovered a data signal at 300.0 KHz. It seems to
be on continuously. I have searched the FCC databases and searched the web,
but can not find out what this signal is. It is S9+10 in Maryland.

There's a USCG DGPS station at Annapolis, but it's on 301.0 KHz.

--
"Here, Outlook Express, run this program." "Okay, stranger."

John P wrote:
I monitor VLF and have discovered a data signal at 300.0 KHz. It seems to
be on continuously. I have searched the FCC databases and searched the web,
but can not find out what this signal is. It is S9+10 in Maryland.

There's a USCG DGPS station at Annapolis, but it's on 301.0 KHz.

--
"Here, Outlook Express, run this program." "Okay, stranger."

All,

Thanks for the replies. I think the mystery is solved. I believe I am
hearing the DGPS station in Annapolis on 301kHz. I hear the same type (but
weaker) signal at 307kHz, which is the DGPS station in Hagerstown, MD.

Thanks all!

John

"Clifton T. Sharp Jr." wrote in message
...
John P wrote:
I monitor VLF and have discovered a data signal at 300.0 KHz. It seems
to
be on continuously. I have searched the FCC databases and searched the
web,
but can not find out what this signal is. It is S9+10 in Maryland.

There's a USCG DGPS station at Annapolis, but it's on 301.0 KHz.

--
"Here, Outlook Express, run this program." "Okay, stranger."

All,

Thanks for the replies. I think the mystery is solved. I believe I am
hearing the DGPS station in Annapolis on 301kHz. I hear the same type (but
weaker) signal at 307kHz, which is the DGPS station in Hagerstown, MD.

Thanks all!

John

"Clifton T. Sharp Jr." wrote in message
...
John P wrote:
I monitor VLF and have discovered a data signal at 300.0 KHz. It seems
to
be on continuously. I have searched the FCC databases and searched the
web,
but can not find out what this signal is. It is S9+10 in Maryland.

There's a USCG DGPS station at Annapolis, but it's on 301.0 KHz.

--
"Here, Outlook Express, run this program." "Okay, stranger."