On Fri, 31 Jul 2009 16:49:54 EDT, "ARRL Letter Mailing List"
wrote:

== LOCAL HAMS AID RESCUE SQUAD TO SOLVE PUBLIC SAFETY INTERFERENCE
ISSUE
[ snip ]
On June 12, the primary repeater output frequency for St John Rescue
http://www.stjohnrescue.org/ was completely blocked by a 2-tone AFSK
signal that continued for more than a week. Because St John Rescue uses
the frequency to dispatch, monitor and provide two-way communications
during emergency calls, it was vital that the cause of the problem be
detected and corrected.
[ snip ]
The source of the interference turned out to be 32 miles away from a
tower on Mount St Georges on the island of St Croix. "The carrier
frequency was just 7.5 kHz above the rescue frequency of 158.7525 MHz,"
she explained. "Upon closer inspection, the problem was isolated to a
repeater that is part of the new US Virgin Islands territory-wide MPT
1327 trunking system. This transmitter was licensed for and was putting
out 120 W with a pass band of 50 kHz and was being tested as the control
channel."
[ snip ]
To head off any future interference problems, the trunking system
promoters have asked St John Rescue to change its current repeater
frequencies to frequencies that theoretically would not receive
interference from the trunking system. Benton said that St John Rescue
is considering this request. -- Information provided by PIO Phyllis
Benton, NP2MZ

Why should St. John Rescue have to change its frequencies. They were
there first, and the new system is causing the interference.
Let the new system change its frequenciesy.
Also, who's going to pay for St. John's frequency change? They would
have to retune the repeaters and all of their mobile radios.
St. Johns shouldn't have to pay.