On Sun, 25 Apr 2010, George wrote:
well this amplifier is rated 90 watts you can see it on e-bay just
type powerwave in the search. it has error eliminating computer inside
and no distortion what so ever. i have it modified and use it at 450
watts and i pushed it with two power supplys that
On Sun, 25 Apr 2010, Joe wrote:
Just be careful. At the ERP antenna output levels that you are
playing with and frequencies involved, things can get dangerous for
human exposure.
Anything above 50W, an OET 65 RF Field Study must be done.
--
Kris Kirby, KE4AHR
Disinformation Analyst
9:40 PM
Subject: Re: [Repeater-Builder] Re: how far
Sent the program to George, Bon Hal.
If anyone else wants a copy you can ask myself or them. Please do not
post It in a file section on any groups, (I look in those), It's copyrighted.
It's nothing fancy
On Mon, 26 Apr 2010, George wrote:
i looked at the pdf that you refering and there is requirements for
mesuring if the signal is more powerful than 1640 watts and the
antenna is 10 meters or less accessibel by people...my antenna is more
than 10 meters above the closest person and the
On Mon, Apr 26, 2010 at 2:20 PM, Kris Kirby k...@catonic.us wrote:
On Mon, 26 Apr 2010, George wrote:
i looked at the pdf that you refering and there is requirements for
mesuring if the signal is more powerful than 1640 watts and the
antenna is 10 meters or less accessibel by people...my
me know how you like it. I have another
that's great for calculating transformers and other such good junk.
Â
Enjoy
--- On Sat, 4/24/10, kevin valentino kevinvalentino@ ... wrote:
From: kevin valentino kevinvalentino@ ...
Subject: Re: [Repeater-Builder] Re: how far
To: Repeater
1 more request for your program.
Thanks, Dan KF8DB
To: Repeater-Builder@yahoogroups.com
From: kevinvalent...@sbcglobal.net
Date: Sat, 24 Apr 2010 21:40:17 -0700
Subject: Re: [Repeater-Builder] Re: how far
Sent the program to George, Bon Hal.
If anyone else wants a copy you can
...@hotmail.com wrote:
From: daniel haines ridet...@hotmail.com
Subject: RE: [Repeater-Builder] Re: how far
To: repeater-builder@yahoogroups.com
Date: Sunday, April 25, 2010, 9:30 AM
1 more request for your program.
Thanks, Dan KF8DB
To: Repeater-Builder@ yahoogroups. com
From
And one more please
W6AMS Andy
Thanks
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of daniel haines
Sent: Sunday, April 25, 2010 6:31 AM
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: how far
1 more request
] On Behalf Of kevin valentino
Sent: Saturday, April 24, 2010 9:40 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: how far
Sent the program to George, Bon Hal.
If anyone else wants a copy you can ask myself or them. Please do not post
It in a file section on any
Depending on the frequency of the site, they might only be putting out 5 watts
of transmit power. Rural sites run more power, and taller antennas to get
better range. In a City, they just don't need or want huge amounts of power
because it will prevent reuse of the frquencies or cause what's
The typical cell site is probably running a 10 watt amplifier with an
ERP of about 100 watts. City sites probably a lot less power. Your in
the high power paging transmitter class. Physical damage can be done in
the nearby horizontal field of the antenna using this much power and
antenna
With all due respect, I think the question most have in their minds is what
are you doing that requires 450 watts at 800 MHz?
Chuck
WB2EDV
- Original Message -
From: George gueorg...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, April 25, 2010 4:08 PM
Subject:
Your saying that you took a 90 watt amp and modified it to 450 watts?
This does not sound believable...
The amp you have is possibly a B band analog amp. 90 watts may have
been used at the cell site to overcome the combining losses that are
involved in putting multiple transmitters on a
I think your original post said that your antenna would be about 30-40
feet off the ground. Unfortunately, power cannot make up for a low
antenna very well. You would need to get your antenna above the
surrounding structures and foliage to have an effective system. If your
house is on a
It sounds like you have a linear amplifier. Linear amplifiers are used
when multiple low power transmitters are to be amplified by one amplifier.
The peak power (actually peak envelope power) capability of the amplifier
must be quite high in order to handle the multiple signals without
generating
I am not saying that you are misleading anyone. I am just pointing out to
all that the amplifier, if intended for multiple low power transmitter
amplification, is indeed capable of rather high power output.
500 watts PEP output with multiple transmitters fed to it is certainly
capable of 500
OK there is a cute little program that actually comes fairly close to
calculating effective radio range based on height, power, line loss(has a cable
database), and frequency. Add the cavity losses in with the line loss.
Calculate the portable at 6 feet, unity gain, using worst case terrain
-Builder] Re: how far
OK there is a cute little program that actually comes fairly close to
calculating effective radio range based on height, power, line loss(has a cable
database), and frequency. Add the cavity losses in with the line loss.
Calculate the portable at 6 feet, unity
the NYB, wish me luck
--- On Sat, 4/24/10, kevin valentino kevinvalent...@sbcglobal.net wrote:
From: kevin valentino kevinvalent...@sbcglobal.net
Subject: Re: [Repeater-Builder] Re: how far
To: Repeater-Builder@yahoogroups.com
Date: Saturday, April 24, 2010, 9:00 PM
OK there is a cute
...@sbcglobal.net
Subject: Re: [Repeater-Builder] Re: how far
To: Repeater-Builder@yahoogroups.com
Date: Saturday, April 24, 2010, 10:31 PM
Allright just found the darn program. Was on an older machine. Norton picks up
a virus, ARRGH, so i will remove it and send it to ypu. You can share
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