Alpha Channel Listing

[remod]

I was wondering if someone could provide me a listing for the "Alpha" channels in a fbi radio. Reason being I heard someone say, "switch to Alpha 7".

And if you have it, maybe someone might be able to help me with the B, C and D channel's.

Thanx.

[davidbond21]

I think we'd all like a complete listing of such agencies radios.

My guess is the A, B, C, D in cases like these are referring to which zone the radio is put in and the number indicates which channel position. So A7 would be zone A channel 7. If the agent wanted to, if he left the channel selector alone and changed to zone B, he'd be on B7. One federal agency I listen to has the same exact same frequencies programmed for two zones, but one are the channels in analog and the other zone is the channels in P25. They can quickly switch between modes on the same frequency by simply changing zones.

[Squad10]

Originally Posted by remod

I was wondering if someone could provide me a listing for the "Alpha" channels in a fbi radio. Reason being I heard someone say, "switch to Alpha 7".

And if you have it, maybe someone might be able to help me with the B, C and D channel's.

Thanx.

Take a look at:

http://www.radioreference.com/forums...onitoring.html

[wayne_h]

The A and B zones are going to be repeaters for the regional area; what's A5 for me locally will be different than A5 for your area. C will typically have some regional for the more secretive divisions and nationwide, and D is usually more nationwide.

[signal500]

Originally Posted by wayne_h

The A and B zones are going to be repeaters for the regional area; what's A5 for me locally will be different than A5 for your area. C will typically have some regional for the more secretive divisions and nationwide, and D is usually more nationwide.

Wayne, you are correct. Here is a channel list from an early 90’s FBI Saber from the midwest all with the famous PL of 167.9:

TX / RX / Alphanumeric
A1 163.8375 167.3625 Local
A2 163.8375 167.6875 Region
A3 163.8375 167.2875 North
A4 163.8375 167.2375 South
A5 163.8375 167.4125 East
A6 163.8375 167.5125 West

B1 165.900 165.900 car-car
B2 165.925 165.925 car-car
B3 165.975 165.975 car-car
B4 162.900 162.900 car-car
B5 162.950 162.950 car-car
B6 162.975 162.975 car-car

C1 163.9875 167.4875 Nation
C2 163.9375 162.6375 Nation
C3 163.8625 167.5375 Nation
C4 167.5625 167.5625 Nation
C5 173.3875 173.3875 Nation
C6 173.8125 173.8125 Nation

D1 168.8625 164.550 OCDETF1
D2 164.550 168.8625 OCDETF2
D3 164.550 164.550 OCDETF3
D4 168.8625 168.8625 OCDETF4
D5 155.475 155.475 Law MA

[SCANdal]

remod,

It sounds to me like the conversation you picked up was an instruction to switch to another repeater. In the channel plans I've seen, the odd numbers following the letters (ID'ing banks A thru G) are repeated channels while the even numbers are the simplex (on the output) of the repeated channel immediately preceeding. Thus, for example, B1 would be 172.525R (167.9) and B2 would be 172.525S (167.9).

SCANdal

[remod]

The conversation I picked up was one person asking another to switch to Alpha 7. I did a search right after but did not hear anything. Made me think maybe I was not close enough.

I know there is some major upgrades going on within that agencies system. I have heard one channel with direct comm's being used as both analog and digital. One side of town had comm's in digital while another side of town had comm's in analog.

Looking over some info I have had on hand made me think what might they be using for Alpha 7. Nothing so far has popped up.

I appreciate the help and will give some of the suggestions made here a try and keep on searching.

Thank you for the help.