List power of FRS/GMRS radios (from FCC data)

Further to discussions on the site I attach below a list showing the power of 50 or so two-way radios certified by the FCC over roughly the past three years. I have it as an excel spreadsheet but this site won’t accept that as an attachment.

Basically the list gives every FRS/GMRS radio submitted by Cobra, Midland and Motorola over that period. I hope it helps people when it comes to choosing radios :slight_smile: .

I have had to hand-crank the data from the FCC site and I am sure there are some transcription errors, although not too many, I hope.

Columns 1 and 2 show the make and model. Column 3 is the ERP (Effective radiated power) on the highest GMRS setting the unit boasts. Column 4 is the ERP on the FRS setting. ERP is the signal strength that actually gets out of the antenna, which is what matters in terms of distance at which a signal could be picked up. Receiver sensitivity and a whole lot of other things will affect whether the signal is actually received, so it does not necessarily follow that the most powerful two-way radio pair will have the longest range. As ever, though, horsepower helps (or technically, tiny fractions of horsepower…)

As I got further into making this list, I got more and more puzzled by the data. Columns 5 and 6 reflect that puzzlement. I have a pair of Cobra LI6050WXs so I spent a bit more time looking at them along with their baby brothers the LI3950DXs, which look to me to have the same casing and antenna.

As well as giving the ERP, the FCC site gives a whole lot of other info, including how to set up the radios and some stuff on power consumption etc.

Looking first at the 6050s, the setup instructions (for technicians) say that the power at the output to the antenna should be 3 watts. This ties in with the power consumption of the final stage amplifier per the FCC, which is 5.18 watts. However the ERP (the power out of the antenna, in effect) is just0.372 watts.

The 3950s setup instructions say that power at the output to the antenna should be 2 watts. The 3950s seem to run a more efficient final stage: pwer consumption is 2.36 watts. But ERP on these is .492 watts.

So with the same antenna we have
6950s: 3 watts in, 0.372 watts out
3950s: 2 watts in, 0.492 watts out.

I’d expect the same aerial to give the same attenuation so what is going on? Also this is a crazy level of loss. Where is all that power going?

I also don’t understand it from the manufacturers’ point of view. There is no commercial advantage in building a more powerful (more expensive) final stage and ending up with a less powerful transmitter. Is there anyone out there in the industry that can give us a clue as to what is going on?

These are my personal ponderings. I hope the attached doc helps everyone in their 2-way radio choice.

Kakistoc

Make: motorola Model: t7100/t7200 GMRS Power: 1.559 FRS Power: 0.402
Make: motorola Model: CP200 GMRS Power: 4.6 FRS Power: 1
Make: Cobra Model: PR3850TX GMRS Power: 1.37 FRS Power: 0.134
Make: Cobra Model: LI6050WX GMRS Power: 0.372 FRS Power: 0.06 final amp stage 5.18 output to antenna 3.0W max
Make: Cobra Model: LI3950DX GMRS Power: 0.492 FRS Power: 0.12 final amp stage 2.36 output to antenna 2.0W max
Make: Cobra Model: PR165VP GMRS Power: 0.245 FRS Power: 0.218
Make: Cobra Model: PR250WX GMRS Power: 0.462 FRS Power: 0.398
Make: Cobra Model: PR990VP GMRS Power: 0.286 FRS Power: 0.233
Make: Cobra Model: PR4700WX GMRS Power: 1.16 FRS Power: 0.5
Make: Cobra Model: PR5050WX GMRS Power: 1.4 FRS Power: 0.5
Make: Cobra Model: PR150VP GMRS Power: 0.72 FRS Power: 0.5
Make: Cobra Model: PR3500DX GMRS Power: 1.2 FRS Power: 0.5
Make: Cobra Model: PR650WX GMRS Power: 1 FRS Power: 0.5
Make: Cobra Model: PR245 GMRS Power: 0.95 FRS Power: 0.5
Make: Cobra Model: LI4900WX GMRS Power: 0.5 FRS Power: 0.31
Make: Cobra Model: LI6550WX GMRS Power: 1 FRS Power: 0.5
Make: Cobra Model: MRHH425LI GMRS Power: 1.9 FRS Power: final amp stage 13.54 output to antenna
Make: Cobra Model: LI7000WX GMRS Power: 1.25 FRS Power: 0.5 final amp stage 6.29 output to antenna 5W max
Make: Midland Model: FG2 GMRS Power: 0.492 FRS Power: 0.41
Make: Midland Model: G220 GMRS Power: 1.3 FRS Power: 0.41
Make: Midland Model: FG1 GMRS Power: 0.54 FRS Power: 0.45
Make: Midland Model: G300 GMRS Power: quoted in DbM FRS Power:
Make: Midland Model: G9 GMRS Power: 1.4 FRS Power:
Make: Midland Model: M222P GMRS Power: 1.3 FRS Power: 0.5 final amp stage 2.7 output to antenna 2W max
Make: Midland Model: G225/G227 GMRS Power: 1.75 FRS Power: 0.41 final amp stage 3.6 output to antenna 1.8W max
Make: Midland Model: LXT314/317 GMRS Power: 0.665 FRS Power: 0.271 final amp stage 2.94
Make: Midland Model: GXT710/735/750 GMRS Power: 1.6369 FRS Power: 0.2447 final amp stage 3.78 output to antenna 3.2W max
Make: Midland Model: LX210/310/330/410/435 GMRS Power: 0.676 FRS Power: 0.307 final amp stage 2.46
Make: Midland Model: GXT700/771 GMRS Power: 1.6369 FRS Power: 0.2447 final amp stage 3.78
Make: Midland Model: GXT555 GMRS Power: 1.549 FRS Power: 0.198 final amp stage 9.66 output to antenna 4.5W max
Make: Midland Model: GXT800 GMRS Power: 1.6379 FRS Power: 0.2035 final amp stage 3.78
Make: Midland Model: XT511 GMRS Power: 1.0815 FRS Power: 0.2622 final amp stage 9.9 output to antenna 4W max
Make: Midland Model: GXT808/850/800 GMRS Power: 1.289 FRS Power: 0.215 this one is very informative
Make: RCA Model: 32350RC3 GMRS Power: 1.59 FRS Power: 0.37
Make: Giant Model: T9140 GMRS Power: 0.06 FRS Power: 0.05
Make: motorola Model: T9500 GMRS Power: 1.03 FRS Power: 0.11
Make: motorola Model: FV600 GMRS Power: FRS Power:
Make: motorola Model: FV225 GMRS Power: FRS Power: 0.14
Make: giant Model: T8260D GMRS Power: FRS Power:
Make: motorola Model: Model 525 GMRS Power: FRS Power: 0.15
Make: motorola Model: T6100 GMRS Power: 0.26 FRS Power: 0.23
Make: motorola Model: FV200 GMRS Power: 0.14 FRS Power: 0.13
Make: motorola Model: SX700 GMRS Power: 0.63 FRS Power: 0.17 per tune up info not test report
Make: motorola Model: FV500 GMRS Power: 0.28 FRS Power: 0.1
Make: motorola Model: T5000/5500 GMRS Power: 0.275 FRS Power: 0.265
Make: motorola Model: SX500 GMRS Power: 0.28 FRS Power: 0.2
Make: motorola Model: FV700/FV750 GMRS Power: 0.75 FRS Power: 0.17
Make: motorola Model: T6525 GMRS Power: FRS Power: 0.21
Make: motorola Model: SX700 GMRS Power: 0.63 FRS Power: 0.17
Make: motorola Model: L1010/R1010 GMRS Power: FRS Power: 0.25
Make: motorola Model: T6300 GMRS Power: FRS Power:
Make: motorola Model: T8500/8510/8530/8550 GMRS Power: 0.68 FRS Power: 0.26
Make: RCA Model: 32310RC3 GMRS Power: 0.63 FRS Power: 0.12
Make: motorola Model: T9580 GMRS Power: 0.75 FRS Power: 0.29
Make: Model: T3800/3400 GMRS Power: 0.09 FRS Power: 0.08
Make: Model: LA8270 GMRS Power: FRS Power: 0.1
Make: Model: L8230 GMRS Power: FRS Power: 0.14
Make: motorola Model: T8525 GMRS Power: FRS Power: 0.32
Make: Model: L3400 GMRS Power: FRS Power: 0.03
Make: Model: T2010 GMRS Power: 0.2 FRS Power: 0.21 yes, this way round

Sorry,

I see it has lost its formatting. If anyone has a website they’d like to post it to and can give me a way of sending them the spreadsheet, I am happy to forward it.

What a great list! Thanks so much, that will help lots of our users here!

Can you PM the file to me? I can post HTML here, maybe I can get it formatted better.

Thanks again!

Danny

Certainly Danny. What does PM mean?

Sorry, a PM is a private message. You can click my name at the top of one of my posts, and then choose “Send a Private Message”.

Danny

How about pinning this one?

Kakistoc,

You have this line in your list above:
Make: motorola Model: t7100/t7200 GMRS Power: 1.559 FRS Power: 0.402

When I looked up K7GT7100, I got the following numbers:
GMRS Power: 0.96 FRS Power: 0.36

I noticed it because I tried to use your list to find a GMRS radio that actually put out close to 2 watts ERP, but I had checked the T7100 on my own before and thought your number was high.

Let me know what you think.

I think there are no GMRS units that have close to 2 watt ERP.

One of the Unidens may reach 2 watts. A lot of the problems range with the Canadian GMRS rules that only allow for a max of 2 watts ERP, and a lot of manufacturers want their radios accepted in both the USA and Canada.

does anyone have the ERP for the Motorola T6400? they are a 1 watt version of the T6300…quite durable, and actually the squad radio of choice for the army/marines in Iraq. that’s right…for inter-squad communications they many times ditched their heavy bulky radios for these small durable 1 watts.

i am just curious as to the ERP of them…is it close to 1 watt?

Do you know/have the FCC ID #? Without that, I can not be of help.

Steve

i will be receiving the radios from an ebay auction on Thursday or Friday. I will send you a message once i get them with the FCC ID#

This is the most useful posting yet!!! Thank you for that. Where did you get that data from?

Great resource!

Here’s another one

Icom IC-F4001
FCCID: AFJ328601 (I think a close cousin is AFJ328602)

1W setting -> 1W output
4W setting -> 4.3W output.

I do not see the listing for the midland GTX 1000
Am I missing something?

The list was posted in 2007, before the GXT1000 was launched.

Here are the numbers on the GXT1000VP4 (FCCID: MMAGXT950).

Low Power -> 0.42W
High Power -> 5.33W