## Re: [GMRS] Re: how far

Expand Messages
• With both radios on fairly flat ground, you will probably NEVER see 14 mile range with UHF, given a 25 antenna height. That is virtually impossible, given
Message 1 of 14 , Feb 1, 2007
With both radios on fairly flat ground, you will probably NEVER see 14 mile range with UHF, given a 25' antenna height. That is virtually impossible, given that the line of sight is only 10 miles. Remember, UHF signals do not bend, skip, or penetrate the earth. With an excellent setup and a 40' high gain antenna, on pretty flat ground I can't get that range, in any direction, ever, although I can get close. That is because I am limited by the same thing everyone else will be, the earth's surface.

When it comes to UHF range remember, antenna height, line of sight, antenna height, line of sight, antenna height, line of sight. Just keep saying that to yourselves. UHF does not reach over the horizon. Period.

Google "line of sight calculator", put in the two antenna heights, and you will know what is POSSIBLE under ideal conditions. You will not exceed this distance with UHF. UNLESS one or both of the radios is on high ground, which effectively changes the antenna height above the surrounding terrain.

Murs is limited to 2 watts, and you are not going to get much power out of an antenna with a long cable run with a 2 watt transmitter, so it will not have the range of GMRS because of this. Forget about MURS if you want that range. GMRS is the way to go, and again, the higher you get that antenna, the farther your range.

----- Original Message ----
From: Skip Sanders <skipsand@...>
To: GMRS@yahoogroups.com
Sent: Wednesday, January 31, 2007 2:43:09 PM
Subject: [GMRS] Re: how far

--- In GMRS@yahoogroups.com, "wew1953" <wew1953@...> wrote:
>
> am looking at gmrs and murs system need to be able to talk about 18 to
> 25 miles moble to base will gmrs do that
>
1) If you're talking MURS, you're presumably wanting to use this for
business. If it's not 'all in your family', GMRS is no longer a
should be investigating local business communication services, with
proper repeaters and such.

2) Range is very tricky to figure reliably, but, the 'rule of thumb'
for range is Range in miles = square root of antenna height in feet,
for VERY reliable range. Remember to add the miles from BOTH ends,
that is, if you have a 25' base antenna, (5 miles), and a mobile at 4',
(2 miles), your high reliability range is 7 miles.

You will routinely get double that range, at times, for 14 miles, but
you can't be strongly sure of getting that. You may well get even a
bit more.

Of course, if your base antenna is 25' above ground, and said ground is
at an altitude of 100 feet, at the top of a hill, the real range is
from the 125', or 11 miles.

All this is direct comms, and if you really need 15-25 mile range on
GMRS (or business frequencies), you probably need to install a repeater
somewhere on high ground that looks 'down' on the area you need to
cover. Any GMRS licensee can put up a repeater, though you should be
consulting with all other local users, especially repeater operators,
before installing one, to prevent causing interference to already
present ones.

____________________________________________________________________________________
Get new email alerts with the free Yahoo! Toolbar.
http://tools.search.yahoo.com/toolbar/features/mail/

[Non-text portions of this message have been removed]
• I think in regards to GMRS, if you want to use a base system, all you d need is a good 6dB gain antenna on a 20 tower (or higher) and a 40w radio (either base
Message 2 of 14 , Feb 2, 2007
I think in regards to GMRS, if you want to use a base system, all you'd need
is a good 6dB gain antenna on a 20' tower (or higher) and a 40w radio (either
base or mobile setup).

If you want a few mobile setups, a good 3-5dB gain mobile antenna with at
least a 35w mobile radio is all you'd need.

My mobile setup consists of a 3dB gain antenna and a 35w Icom F420 mobile. I
can hit all local repeaters and all other mobile or HT's within a 8-10 mile
radius. And I'm in a valley with hills and buildings. My lines are short, but I
concentrate my power to where I need it to go and who I want to talk to.

For my repeater, I had a computer model it's signal propagation with 40w at
310' elev, using a 6dB gain base antenna. My results gave me a maximum radius
of over 40 miles in any direction without obstruction to the hills or
buildings.

It all depends on what antenna, hardline, and radio equipment you choose to
create your setup. The final is the result of your decision. You can view my
charts and equipment pics on my website for more detailed info.

73,
Ryan Seregow - WPUI299
Owner/Coordinator
Bay Area Repeater Net
San Jose, CA
http://www.geocities.com/bayarearepeaternet/

[Non-text portions of this message have been removed]
• i live in south east kansas and work in mimia ok. and by road it about 12 to 18 miles depen witch way you go am not sure how many air miles it is it is all
Message 3 of 14 , Feb 3, 2007
i live in south east kansas and work in mimia ok. and by road it about
12 to 18 miles depen witch way you go am not sure how many air miles
it is it is all flat land hear and i have room to go up to about 50 to
60 feet with a ant.thir is no repeter in this ares other then 2 meter one
so was thinking about gmrs or murs system base and two mobel with one
hand helt. as need to be abeal to contack the base a few time aday to
check on a family memeber that is in a whele chair when i was in the
army we use vhf and had 20 to 30 mile range so frme the respon that i
am seen on both gmrs and murs they are not that good for range othen
• MURS will not do what you want as power is limited to 2 Watts and NO REPEATERS. GMRS is your only hope other than HAM. The as-the-crow-flys or line of site
Message 4 of 14 , Feb 4, 2007
MURS will not do what you want as power is limited to 2 Watts and NO REPEATERS. GMRS is your only hope other than HAM. The "as-the-crow-flys" or line of site distance is the only number that counts with as much height as you can get.

I83 runs almost due north/south in York County PA. My repeater is at mile 4. I can hit the repeater and have a converstaion from exit 16, that's 12 "drive" miles. Straight line a little less but the point is my 10 watt repeater makes the trip fine and I am using an IC-F21GM 4 watt handheld hooked to a nice gain mobile antenna from the car. True, it does not work in the valleys, at all, but on the hills it is great.

You can setup a 45 watt base and 45 watt mobile for max power and probably make the trip. But a repeater somwhere in the middle would be better. A nice high antenna and each unit would only have to go 6 or 8 muiles and you would not need as much power on each end. Put the repeater closer to home and someone there could probably hit it with an HT and then a good mobile unit for your car.

Well, just my thoughts. Others may have better ideas.

Stan WQFD736

----- Original Message -----
From: wew1953
To: GMRS@yahoogroups.com
Sent: Saturday, February 03, 2007 1:17 PM
Subject: [GMRS] how far

i live in south east kansas and work in mimia ok. and by road it about
12 to 18 miles depen witch way you go am not sure how many air miles
it is it is all flat land hear and i have room to go up to about 50 to
60 feet with a ant.thir is no repeter in this ares other then 2 meter one
so was thinking about gmrs or murs system base and two mobel with one
hand helt. as need to be abeal to contack the base a few time aday to
check on a family memeber that is in a whele chair when i was in the
army we use vhf and had 20 to 30 mile range so frme the respon that i
am seen on both gmrs and murs they are not that good for range othen

------------------------------------------------------------------------------

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.17.24/668 - Release Date: 2/4/2007 1:30 AM

[Non-text portions of this message have been removed]
• Murs with 2 watts is not going to do it. Just not enough power to send up a long feed line. GMRS with a 60 foot high antenna should give you a 14 mile range.
Message 5 of 14 , Feb 5, 2007
Murs with 2 watts is not going to do it. Just not enough power to send up a long feed line.

GMRS with a 60 foot high antenna should give you a 14 mile range. That may work in your case. Check the air distance on a map.

----- Original Message ----
From: wew1953 <wew1953@...>
To: GMRS@yahoogroups.com
Sent: Saturday, February 3, 2007 10:17:59 AM
Subject: [GMRS] how far

i live in south east kansas and work in mimia ok. and by road it about
12 to 18 miles depen witch way you go am not sure how many air miles
it is it is all flat land hear and i have room to go up to about 50 to
60 feet with a ant.thir is no repeter in this ares other then 2 meter one
so was thinking about gmrs or murs system base and two mobel with one
hand helt. as need to be abeal to contack the base a few time aday to
check on a family memeber that is in a whele chair when i was in the
army we use vhf and had 20 to 30 mile range so frme the respon that i
am seen on both gmrs and murs they are not that good for range othen

____________________________________________________________________________________
No need to miss a message. Get email on-the-go
with Yahoo! Mail for Mobile. Get started.
http://mobile.yahoo.com/mail

[Non-text portions of this message have been removed]
• Use a repeater. I have two well located repeaters. Range is about 17 miles on each to 25 watt mobiles with good reliability. Sometimes I can get 30 miles
Message 6 of 14 , Feb 5, 2007
Use a repeater. I have two well located repeaters. Range is about 17
miles on each to 25 watt mobiles with good reliability. Sometimes I
can get 30 miles but that's rare. One repeater is about 150 feet up
and the other is on a mountain top - elevation 1750' on a 100' tower.
Repeaters are 35 miles apart.

Count on 40% of that distance to handhelds.

--- In GMRS@yahoogroups.com, "wew1953" <wew1953@...> wrote:
>
> am looking at gmrs and murs system need to be able to talk about 18 to
> 25 miles moble to base will gmrs do that
>
• your ideal make more sence then what other have had so far Walters wrote: MURS will
Message 7 of 14 , Feb 5, 2007
your ideal make more sence then what other have had so far

Walters <abacuspc@...> wrote: MURS will not do what you want as power is limited to 2 Watts and NO REPEATERS. GMRS is your only hope other than HAM. The "as-the-crow-flys" or line of site distance is the only number that counts with as much height as you can get.

I83 runs almost due north/south in York County PA. My repeater is at mile 4. I can hit the repeater and have a converstaion from exit 16, that's 12 "drive" miles. Straight line a little less but the point is my 10 watt repeater makes the trip fine and I am using an IC-F21GM 4 watt handheld hooked to a nice gain mobile antenna from the car. True, it does not work in the valleys, at all, but on the hills it is great.

You can setup a 45 watt base and 45 watt mobile for max power and probably make the trip. But a repeater somwhere in the middle would be better. A nice high antenna and each unit would only have to go 6 or 8 muiles and you would not need as much power on each end. Put the repeater closer to home and someone there could probably hit it with an HT and then a good mobile unit for your car.

Well, just my thoughts. Others may have better ideas.

Stan WQFD736

----- Original Message -----
From: wew1953
To: GMRS@yahoogroups.com
Sent: Saturday, February 03, 2007 1:17 PM
Subject: [GMRS] how far

i live in south east kansas and work in mimia ok. and by road it about
12 to 18 miles depen witch way you go am not sure how many air miles
it is it is all flat land hear and i have room to go up to about 50 to
60 feet with a ant.thir is no repeter in this ares other then 2 meter one
so was thinking about gmrs or murs system base and two mobel with one
hand helt. as need to be abeal to contack the base a few time aday to
check on a family memeber that is in a whele chair when i was in the
army we use vhf and had 20 to 30 mile range so frme the respon that i
am seen on both gmrs and murs they are not that good for range othen

----------------------------------------------------------

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.17.24/668 - Release Date: 2/4/2007 1:30 AM

[Non-text portions of this message have been removed]

---------------------------------
Cheap Talk? Check out Yahoo! Messenger's low PC-to-Phone call rates.

[Non-text portions of this message have been removed]
Your message has been successfully submitted and would be delivered to recipients shortly.