Hello, I am currently resident of Topsfield.
I just came across this thread while doing some research.
To my understanding, the normal police frequency is 453.975 with an offset of +005.000 with a pl tone of 74.4
I did some research on the frequency 852.0125 and it came back licensed to the Commonwealth of Massachusetts. Is anyone aware if the police fully switch over to that frequency during the fair? Or if anyone has any other information regarding the Topsfield Fair's frequencies or the frequencies uses by the town during this time. As the fair is coming up in a few months, I would like to have the info so I can check this out during the most active time of year for the town.
If anyone has any questions regarding the normal Topsfield PD frequency, let me know.
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Best Regards,
-kjl
EDIT:
I found some information on this frequency, it is supposedly called the 8-tac frequencies used by the state, let me know if anyone has any info.:
https://gyazo.com/00639b32bf6ea3e4aa6255f86ff6dad1