: Re: Re: [Repeater-Builder] Re: Repeater Range : Estimate Program
Available
--- Ron Wright [EMAIL PROTECTED] wrote:
Ralph,
I am sure the equation is
Distance (in miles) = Square Root of (2 * height
in feet)
not
Distance (in miles) = Square Root (height
Ralph Mowery wrote:
Then my refferance (ARRL Antenna Book 1974 version
page 11) must be wrong.
Gee-that would be a surprise...NOT!
BTW, I've been meaning to put this up for a long time: anyone want a
2006 ARRL Antenna book, still in the wrapper? At least I think it's
'06...no older then
Eric Lemmon wrote:
Fred, et al:
The General Electric Datafile Bulletin 10003-1 is available for download
here:
www.repeater-builder.com/ge/datafile-bulletin/df-10003-01.pdf
These two files are also needed to perform the calculations:
Jim wrote:
Ralph Mowery wrote:
Then my refferance (ARRL Antenna Book 1974 version
page 11) must be wrong.
Gee-that would be a surprise...NOT!
BTW, I've been meaning to put this up for a long time: anyone want a
2006 ARRL Antenna book, still in the wrapper? At least I think it's
As a quick and dirty method, the radio horizon is:
Distance (in miles) = Square Root of (2 * height in feet).
Power and frequency do not really play that much into it. This has
been mentioned in many stories of a repeater running just on the
exciter and not many noticed. Once you get past the
Height = elevation AMSL of the antenna, HAAT, or AGL (which would make
no sense)?
Joe M.
ldgelectronics wrote:
As a quick and dirty method, the radio horizon is:
Distance (in miles) = Square Root of (2 * height in feet).
On Aug 30, 2007, at 12:35 AM, ldgelectronics wrote:
As a quick and dirty method, the radio horizon is:
Distance (in miles) = Square Root of (2 * height in feet).
It's a rule of thumb, but isn't nearly as accurate as doing the real
engineering on a system.
Power and frequency do not
On Aug 30, 2007, at 1:20 AM, MCH wrote:
Height = elevation AMSL of the antenna, HAAT, or AGL (which would make
no sense)?
I assumed HAAT for my calculations and that number seemed to be the
most sane, after trying a few. But I think the resulting number is
generous for a badly-built
for!
This Data File may be available on line, I am not sure if it is.
Fred W5VAY
- Original Message -
From: ldgelectronics
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, August 30, 2007 1:35 AM
Subject: [Repeater-Builder] Re: Repeater Range : Estimate Program Available
As a quick
Range : Estimate Program Available
On Aug 30, 2007, at 1:20 AM, MCH wrote:
Height = elevation AMSL of the antenna, HAAT, or AGL (which would make
no sense)?
I assumed HAAT for my calculations and that number seemed to be the
most sane, after trying a few. But I think
On Aug 30, 2007, at 12:35 AM, ldgelectronics wrote:
As a quick and dirty method, the radio horizon is:
Distance (in miles) = Square Root of (2 * height in feet).
This equation is ok, but for a perfect spheer. Is a good place to start. Here
in FL where max altitude is
As a quick and dirty method, the radio horizon (RH) is:
Distance (in miles) = Square Root of (2 * height in feet).
This equation is ok, but for a perfect spheer. Is a good place to
start. Here in FL where max altitude is about 330 ft ASL it works
pretty well although the lower the
--- Ron Wright [EMAIL PROTECTED] wrote:
On Aug 30, 2007, at 12:35 AM, ldgelectronics wrote:
As a quick and dirty method, the radio horizon
is:
Distance (in miles) = Square Root of (2 * height
in feet).
This equation is ok, but for a perfect spheer. Is a
-Builder] Re: Repeater Range : Estimate Program
Available
--- Ron Wright [EMAIL PROTECTED] wrote:
On Aug 30, 2007, at 12:35 AM, ldgelectronics wrote:
As a quick and dirty method, the radio horizon
is:
Distance (in miles) = Square Root of (2
--- Ron Wright [EMAIL PROTECTED] wrote:
Ralph,
I am sure the equation is
Distance (in miles) = Square Root of (2 * height
in feet)
not
Distance (in miles) = Square Root (height in feet).
Then my refferance (ARRL Antenna Book 1974 version
page 11) must be wrong. They give
: Repeater Range : Estimate Program
Available
To All Interested: I would invite you attention to a paper presented by
Kenneth Bullington, Radio Propagation at Frequencies Above 30 Meagcycles
in the October 1947 Proceedings of the I.R.E. - Waves and Electronics
Section. Most all radio propagation
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