Interference in Centeral Alabama on 151.025 HELP

[hotphoneman]

Nearly every morning and often in late evening I am getting a carrier on 151.025. It is on for about 3 seconds drops for just about a half a second and is back on again. No PL tone just carrier. I think it may be some type of trunking system. I have heard audio on it but not very often. What is really strange is that I have traveled from North of Birmingham to 25 miles south of Montgomery ( more than once) and the signal strength didnt change very much. I have determined it is not a birdy from my radio and it is not comeing from anything on my car.
If anyone else can pick this up try to get a bearing on it if you have a directional antenna and post it here.
The signal is not real strong but it is strong enough that I have to lock that channel out on my scanner till it fades away.
This has been going on for about 6 months.

Thanks everyone

[KEV200]

151.025 was used by the Green County HWY dept. several years ago. Don't know about today.

[AlabamaRS]

Sounds like maybe an LTR system or perhaps a dataa channel now. do n FCC lookup & see what is listed for your area on for that frequency.

[js_scan888]

Maybe you have 151.0250 in your scanner for the city of Clanton. The FCC database shows a trunked system for Shelby county using 151.0325 WPXF230. If this is a LTR passport system, then it will key up about every 3 seconds. The two different freqs are only 7.5 Khz apart, so you might get bleed over on your scanner. VHF systems do tend to travel more distance in the mornings and evenings.

[hotphoneman]

I dont think this is coming from the Shelby county system. The signal is on 151.0250. Read it on a Motorola service monitor. Unlike the LTR type system that keys up about every 3 seconds this station seems to stay keyed and drop out for about a half second every few seconds. Nearly backwards of the LTR system.
The really strange thing is that I have picked up this signal as far north as Cullman and as far south as Greenville and to the east Alexander City. The signal strength is about the same in all these places. I thought it was a problem in my radio or a signal from the computer in my car ,but when I heard it on 2 other sets in other cars and on a service monitor that blew that idea.
I did hear audio on it this morning. It was in Spanish, now days that is not a clue as to where it was coming from.
I have picked up a directional antenna and will try to get a bearing on it soon.
Thanks for the ideas everyone. Please keep them coming. I will post results when I have any to share.