Does anyone know what this "Multnomah Services" frequency is about? Its not on the normal LMR radio frequency bands and its within the range for traditional radio FM broadcasting. Im assuming maybe its either an older frequency for public works, or some form of an emergency radio station to broadcast information? Can't find anything else about it aside from it being tagged as public safety.
mmckenna
I ♥ Ø
A few things I can add:
1. The license expired back in 2014. Doesn't necessarily mean it's not still in use, but if it is, it's not covered by that old call sign.
2. 72MHz is part of the LMR band. It is/was often used for linking sites, remote control of equipment, clock systems, and a few other things.
3. The emission designator on the original license ( https://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=1215309 ) shows 20K0F3E, which is analog voice, so it's likely that this may have been used for linking radio sites.
Maybe someone from that area will have some historical knowledge that will let us know exactly what it was.
1. The license expired back in 2014. Doesn't necessarily mean it's not still in use, but if it is, it's not covered by that old call sign.
2. 72MHz is part of the LMR band. It is/was often used for linking sites, remote control of equipment, clock systems, and a few other things.
3. The emission designator on the original license ( https://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=1215309 ) shows 20K0F3E, which is analog voice, so it's likely that this may have been used for linking radio sites.
Maybe someone from that area will have some historical knowledge that will let us know exactly what it was.
Right I should have mentioned specifically the typical 150 and 400 LMR bands. Ive kept a scanner tuned to that frequency and have yet to hear anything. Looked in Oregon's interop radio plan and didn't find anything there at least referring to it. I know in the UK back in the 80s and 90s at least, the 70 and 80mhz bands were used for law enforcement.
mmckenna
I ♥ Ø
Right, it was mainly used for linking remote radio sites. It's still used for that in some areas, but not quite as often anymore.
You won't find it in interop use as it was mainly used as point to point.
AKA: Midband.
There are still companies that make midband radios, and it's still used in many parts of the world.
radiotweester
Member
Time standard. You'll see schools etc that have these. From long before GPS time standard
So it's like a radio based clock that is used to base programming real world clocks off of?
mmckenna
I ♥ Ø
If that's what it is.
Looking at the license I linked to, I don't believe it is. The emission designator showed analog voice. The power levels used and the locations don't lend themselves well to a centralized clock system.
Wireless mics are used on that band (at least they are at my employer) ERP is a bit too high for that though...
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