KY197, KY 97 what's the Difference?

In article ,
Matt Whiting wrote:

The difference between 5W and 10 Watts should be almost insignificant
(IE 3 db) in use.

Why would having twice as much power not be significant?

at low altitudes, wouldn't line-of-sight be more significant?

--
Bob Noel
(gave up looking for a particular sig the lawyer will hate)

On Mon, 02 Apr 2007 01:43:47 GMT, Matt Whiting
wrote:

Roger wrote:
On Sun, 01 Apr 2007 12:19:17 -0400, Dave Butler wrote:

Roger wrote:
What's the difference between the KY 197 and the current KY 97?
100.

Actually it's a bit over $1000 or there abouts.
The difference between 5W and 10 Watts should be almost insignificant
(IE 3 db) in use.

Why would having twice as much power not be significant?

You'd think so, but 3 db isn't much and would be barely noticable up
to the service ceiling that we can fly unpressurized. 5W would
provided a good signal all the way to the horizon.


Matt
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

Theoretical range of a 5 watt transmitter and 1 microvolt receiver using
quarter-wave whip antennas on both ends of the link is about 3000 miles. 10
watt range is about 4300 miles.

Radio horizon (the point past at which VHF isn't going to be heard) at
20,000 MSL over perfectly flat ocean is about 280 miles. 5 watts and 10
watts will be heard roughly identical at horizon.

Jim




"Matt Whiting" wrote in message
...



Why would having twice as much power not be significant?

Matt

Jim,

I was going to ask where we'd find that "perfectly flat" ocean, but thought
better of it. g

Jon

"RST Engineering" wrote in message
...
Theoretical range of a 5 watt transmitter and 1 microvolt receiver using
quarter-wave whip antennas on both ends of the link is about 3000 miles.
10 watt range is about 4300 miles.

Radio horizon (the point past at which VHF isn't going to be heard) at
20,000 MSL over perfectly flat ocean is about 280 miles. 5 watts and 10
watts will be heard roughly identical at horizon.

Jim

No wasn't it those garmmin early gps coms were 6 watts and people had
range problems. Now they are 10 or 12 watts.

Roger wrote:

Actually all I need is to fix the orange/yellow plastic window over
the display. Some where in the past (before I purchased the Deb) I'd
guess some one used the wrong stuff to try and clean the window.
Combined with age that has rendered the plastic window almost opaque.
I wonder if the stuff they use to fix scratched plastic glasses would
work on that? Trying would certainly be cheaper than purchasing
another radio or even front panel. The KY197s are going for as much
on E-bay (yellow tagged) as a new KY97.

If the plastic window is all that is wrong with it, you're a lucky man.
Most old KY-97s have a problem with the LCD display going wacky (particularly
when the unit is cold). You have to push on the face of the radio to make it
read correctly. This is such a common problem that I'd shy away from a used
KY-97, unless I could verify that it was still fairly young.

If it's just the window plastic, you could just undo the two screws on each
side of the radio that hold the faceplate on. The plastic piece will fall
right out. It shouldn't be too hard to find something that'll work in there
(or maybe leave it out altogether).

Since my display went crazy, I decided to go with an ICOM IC-A200 as a
slide-in replacement. Pacific Coast Avionics was selling them for $800. Not
bad when you consider the price of a new KY-97A.

John Galban=====N4BQ (PA28-180)

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