29788 kHz FM ute comms, Pennsylvania

[Dag]

At 1530+ Z  Monday Dec 22, 29788 mhz there's occasional FM voice communication between vans and a base with a 60 Hz hum on the carrier. Both sides of the communications have the same signal strength and the AC hum, so perhaps I'm hearing a repeater output.

Various people identifying themselves with their first name and a van number (i.e. van 43) indicating they are en-route to the Pittsburgh fire station for training.

Also, one person requested days for time off. They were approved.

Who is this?

Dag

[Token]

Did you measure the hum as 60 Hz, or are you going by ear?  It is possible this is a PL tone.

You may have heard the repeater output of Van Pool Transportation, Fitchburg, MA.  They have a repeater with an output of 29.79 MHz, and a PL of 100 Hz.

T!

[Dag]

Thanks for identifying the signal: it's extremely likely you've identified it correctly.

 It was "by ear" that I guessed a 60 Hz tone.