HFU HF Underground

Loggings => VHF/UHF Logs, including satellites and radiosondes => Topic started by: Harriku on February 12, 2023, 1640 UTC

Title: Help to identify US Fire/EMS -stations 33-34 MHz?
Post by: Harriku on February 12, 2023, 1640 UTC
Hello from Finland.

F2 is now giving Fire-/EMS-signals from US East Coast to Finland between 33 - 34 MHz. I can hear those EMS-/Fire stations every day aroud 15utc for about 2h period.
I heard those already 10 years ago but I have lost my data and knowledge.

All stations skips from around 6-7 states from 6200 - 6800 km distance around New York.

1) What is the best source and way to make searches by frequency / state?
In these searches the only thing I know at the start is frequency.
Then I can hear and understand some city- and streetnames and possibly quick callsign ids.

2) Is there a subtone -data available? (=What station is using certain subtone signal)

3) What is  the best and realiable software to id and convert subtone frequency?

4) Anybody willing to help to ID these stations from audiofiles?

Harri
Naantali
SW Finland

Title: Re: Help to identify US Fire/EMS -stations 33-34 MHz?
Post by: prldx on February 12, 2023, 1701 UTC
Hi Harri,

Hello from Finland.

F2 is now giving Fire-/EMS-signals from US East Coast to Finland between 33 - 34 MHz. I can hear those EMS-/Fire stations every day aroud 15utc for about 2h period.
I heard those already 10 years ago but I have lost my data and knowledge.

All stations skips from around 6-7 states from 6200 - 6800 km distance around New York.

1) What is the best source and way to make searches by frequency / state?
In these searches the only thing I know at the start is frequency.
Then I can hear and understand some city- and streetnames and possibly quick callsign ids.


FCC database search:
https://wireless2.fcc.gov/UlsApp/UlsSearch/searchAdvanced.jsp;JSESSIONID_ULSSEARCH=GVrFjphThqBZFrBLBGDVj4M61RL8PcXy1qYBJ1QcQmVwtH5r5JMg!-972157754!-1703792801

73,
Patrick
Title: Re: Help to identify US Fire/EMS -stations 33-34 MHz?
Post by: R4002 on February 13, 2023, 1217 UTC
The FCC DB is a good place to start.  Also check out the current 2023 VHF low band skip logs thread on RadioReference.  There is a lot of confirmed information there (including things like callsigns, PL tone/CTCSS tones or DPL codes/DCS codes in use) for the 33 MHz fire dispatch band and the 30-50 MHz band in general. 

https://forums.radioreference.com/threads/2023-vhf-low-band-logs.436351/page-24


Hope this helps.  There is a lot of exciting DX coming in on the 25-30 MHz band and the 30-50 MHz band right now with the cycle heating up like it is.