MURS questions

[Kcmusa]

I’m new to this stuff and don’t understand all.
are the MURS channels license free? This is what I read from the FCC;
“MURS is licensed by rule. This means an individual license is not required for an entity to operate a MURS transmitter if it is not a representative of a foreign government and if it uses the transmitter in accordance with the MURS rules outlined in 47 C.F.R. Part 95 Subpart J.”

I understand there are 5 channels, but more listed in other list’s.
Itinerant use only, can one use theses channels in car to car communication?
im trying to get a handle on all this and the forum has been great getting me started.

 

[BinaryMode]

Yes, MURS are five channels and license free. They were part of the business band if I have that right and some of the current itinerant business channels are near the MURS channels.

Ideally you'd want an FCC part 95 certified (for lack of the right word) radio. So a lot of those CCRs (Cheap Chinese Radios) would be out of the question unless they're part 95 accepted. I think Retevis has some. Do note I said ideally. It's itinerant so there's that...

Definition: unlicensed or licensed by rule operations from 47 USC § 1508(a)(2) | LII / Legal Information Institute

Federal Register :: Request Access

More Info. MURS - HFUnderground

 

[kf8yk]

Itinerant use only, can one use theses channels in car to car communication?

There's no requirement for itinerant use only, MURS can be used at a fixed location or 'on the go'. Mobile operations are permitted, except for airborne ops.

 

[BinaryMode]

After reading the FCC rules, I had no idea digital was allowed.

 

[smittie]

I’m new to this stuff and don’t understand all.
are the MURS channels license free? This is what I read from the FCC;
“MURS is licensed by rule. This means an individual license is not required for an entity to operate a MURS transmitter if it is not a representative of a foreign government and if it uses the transmitter in accordance with the MURS rules outlined in 47 C.F.R. Part 95 Subpart J.”

BTech, Retevis, and Radioddity have products labelled MURS. Presumably they have actually gone through the FCC approval process.
ICOM and and Motorola also have MURS specific handhelds.

Amazon.com : murs radio

 

[bravo14]

After reading the FCC rules, I had no idea digital was allowed.

Do you have a link for info on this? If digital is allowed wonder if voice is allowed.

 

[nd5y]

After reading the FCC rules, I had no idea digital was allowed.

Except none of the emission designators listed in 95.2771 for digtial modes (the ones that end in B or D) are for digital voice.

§ 95.2771 MURS emission types.
A MURS transmitter must transmit only emission types A1D, A2B, A2D, A3E, F2B, F1D, F2D, F3E, and G3E. Emission types A3E, F3E and G3E may include selective calling or tone-operated squelch tones to establish or continue voice communications. MURS transmitters are prohibited from transmitting in the continuous carrier mode.

B = telegraphy for automatic reception
D = data, telemetry, telecommand
E = telephony (including sound broadcasting)

The complete emission designator format is explained in Federal Register :: Request Access.

 

[mmckenna]

I’m new to this stuff and don’t understand all.
are the MURS channels license free? This is what I read from the FCC;
“MURS is licensed by rule. This means an individual license is not required for an entity to operate a MURS transmitter if it is not a representative of a foreign government and if it uses the transmitter in accordance with the MURS rules outlined in 47 C.F.R. Part 95 Subpart J.”

"License by rule" is NOT license free.
License by rule means you are permitted to use the radio service if, and only if, you abide by ALL of the rules. Just like radio services where you are required to have an issued license, the FCC can take away your permission to use the radio service if you do not abide by ALL the rules.

I understand there are 5 channels, but more listed in other list’s.

MURS -only- has 5 channels.

Itinerant use only, can one use theses channels in car to car communication?
im trying to get a handle on all this and the forum has been great getting me started.

The 5 MURS frequencies can be used for car to car.


Itinerant use just means "no fixed location".

Be aware that there are itinerant frequencies under other radio services, and those do absolutely require a license, and are not part of MURS.

 

[K6GBW]

Please, before anyone starts talking on digital consider what that does to everyone else on the frequency. Those with an FM radio will all of a sudden get their receivers floored by an obnoxious digital buzzing noise. It's super annoying and its not even authorized by the FCC, so why? I say this because here in the L.A. area there are a number of individuals that think it's cool to come up on GMRS using P25 and it's hideous to listen to . Please don't be that guy.

 

[bill4long]

Just to be clear, digital voice is not legal on MURS. Only analog AM (A3E), analog FM (F3E) and analog phase modulation (G3E).

Having said that, given that Europe and other countries have a "license free" (by rule) personal digital radio service (e.g., PMR), it's kinda ridiculous that the FCC hasn't created a digital personal radio service. Of course, there's always ham radio, but not everyone wants to get a ham license just to use some low powered radios on vacation.

 

[K6GBW]

Just to be clear, digital voice is not legal on MURS. Only analog AM (A3E), analog FM (F3E) and analog phase modulation (G3E).

Having said that, given that Europe and other countries have a "license free" (by rule) personal digital radio service (e.g., PMR), it's kinda ridiculous that the FCC hasn't created a digital personal radio service. Of course, there's always ham radio, but not everyone wants to get a ham license just to use some low powered radios on vacation.

Then we need a proposal to get one going! I think adding another 5-10 frequencies to the MURS service and make them very narrow band digital would be great. Shouldn't actually be all that hard to do. The 150-151 frequencies have freed up a lot. The old AAA and Towing frequencies are almost completely unused. We need a couple of big manufacturers to put in a proposal because the FCC won't listen to use common folk.

 

[bill4long]

Then we need a proposal to get one going! I think adding another 5-10 frequencies to the MURS service and make them very narrow band digital would be great. Shouldn't actually be all that hard to do. The 150-151 frequencies have freed up a lot. The old AAA and Towing frequencies are almost completely unused. We need a couple of big manufacturers to put in a proposal because the FCC won't listen to use common folk.

We do have a 900mhz digitl spread spectrum by-rule band and it even allows encryption, but 900mhz is not as good as 450mhz. For some reason only Motorola makes radios for it and quite pricey.

 

[BinaryMode]

We do have a 900mhz digitl spread spectrum by-rule band and it even allows encryption, but 900mhz is not as good as 450mhz. For some reason only Motorola makes radios for it and quite pricey.

Are you referring to the 1 watt DTRs?

 

[BinaryMode]

Then we need a proposal to get one going! I think adding another 5-10 frequencies to the MURS service and make them very narrow band digital would be great. Shouldn't actually be all that hard to do. The 150-151 frequencies have freed up a lot. The old AAA and Towing frequencies are almost completely unused. We need a couple of big manufacturers to put in a proposal because the FCC won't listen to use common folk.

I'm in.

 

[ki7be]

We do have a 900mhz digitl spread spectrum by-rule band and it even allows encryption, but 900mhz is not as good as 450mhz. For some reason only Motorola makes radios for it and quite pricey.

Old Nextel cell phones will transmit about two miles line of sight on 900 MHz spread spectrum. I used them to communicate with my kids when we lived in an apartment complex and they went to the pool.

 

[bill4long]

Are you referring to the 1 watt DTRs?

Yep

 

[BinaryMode]

Old Nextel cell phones will transmit about two miles line of sight on 900 MHz spread spectrum. I used them to communicate with my kids when we lived in an apartment complex and they went to the pool.

Yeah, I have about 15 of those Nextel radios for a SHTF scenario. LOL! I love eBay...

They use a VSLEP modulation and frequency hopping spread spectrum. I guess iDEN? Now I can't find the entry at Wikipedia. Maybe the acronym is wrong? Vector Sum Linear Excited Prediction I do believe.

Edit-

Here it is. Vector sum excited linear prediction - Wikipedia

 

[BinaryMode]

Yep

I had a pair and they were pretty cool, but I eventually sold them on eBay.

 

[Radioflow]

Please, before anyone starts talking on digital consider what that does to everyone else on the frequency. Those with an FM radio will all of a sudden get their receivers floored by an obnoxious digital buzzing noise. It's super annoying and its not even authorized by the FCC, so why? I say this because here in the L.A. area there are a number of individuals that think it's cool to come up on GMRS using P25 and it's hideous to listen to . Please don't be that guy.

Yeah they are the most annoying. I hear a lot of DMR, and it's barely decodable.