Can't hear both sides of the conversation.

[chas0039]

I am listening to analog 2 meter fire frequencies in the area and all the frequencies but one allow me to hear both sides. The listings here seem to be the same for all the stations I am listening to, they list a CTCSS tone for transmitting but I assume this is not needed for listening as none of the other stations have any issues.

Any ideas? The station is MN, Carver County:

154.10000 KWM572 B 136.5 PL FIRE PAGING Fire Paging FM Fire Dispatch

Much thanks.

 

[KE4ZNR]

I am listening to analog 2 meter fire frequencies in the area and all the frequencies but one allow me to hear both sides. The listings here seem to be the same for all the stations I am listening to, they list a CTCSS tone for transmitting but I assume this is not needed for listening as none of the other stations have any issues.

Any ideas? The station is MN, Carver County:

154.10000 KWM572 B 136.5 PL FIRE PAGING Fire Paging FM Fire Dispatch

Much thanks.

I have never visited the area and can only speculate from the couple of mins research I have done in the database but it looks like the 154.100Mhz frequency you list above is a one way paging frequency with the Carver County Fire Depts replying to dispatch (and all other FD radio traffic) on the ARMER Trunked Radio System. We have a few frequencies like this here in Central NC. Fire Depts use one way receive only Minitor pagers to receive the initial dispatch then respond back on a trunked radio system. In a majority of cases the initial dispatch/alert is multicasted on both the trunked radio system and a one way VHF/UHF receive only frequency.
Hope this helps!
Marshall KE4ZNR

 

[chas0039]

Thanks much, I am sure you are right, it makes perfect sense. It was confusing when all the other fire channels were two-way, but I would guess they have some reason to do it this way.

 

[ka3nxn]

Or the other thing that may be happening is that they are not using a repeater. They are using a simplex frequency and you'll only hear the strongest, closest station to you. This is especially true if they are using hand held radios with rubber ducks for antennas out in the field. The best they will go is only a few miles. There are several small rural agencies here in VA that do exactly that.

 

[KE4ZNR]

Or the other thing that may be happening is that they are not using a repeater. They are using a simplex frequency and you'll only hear the strongest, closest station to you. This is especially true if they are using hand held radios with rubber ducks for antennas out in the field. The best they will go is only a few miles. There are several small rural agencies here in VA that do exactly that.

Normally you might be right but in this case there is one
big clue pointing towards my theory being more accurate:

FIRE PAGING Fire Paging FM Fire Dispatch

I do once again give the caveat that I don't live in the area so I can
only go by what the database can tell us.

Marshall KE4ZNR