Hand Held Radios (Com + Nav)and GPS...Help?

That's an interesting heresy. Care to share where you got this information?
Most of us have switched to NiMH because of the nicad's notorious self-discharge
effects. That's why they were invented.

Jim


Stealth Pilot
shared these priceless pearls of wisdom:

-
-
-if you charge up a nicad it will retain the charge for quite some
-time.
-a NiMh battery by comparison will self discharge in about a week.
-they charge quicker but need to be fully charged just prior to use for
-the best effect.



Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

Jim Weir wrote:

That's an interesting heresy. Care to share where you got this information?
Most of us have switched to NiMH because of the nicad's notorious self-discharge
effects. That's why they were invented.

It's not a heresy, just overstated. It's well-known that NiMH cells suffer
from much more self-discharge than alkaline and somewhat more than NiCd
cells. (But they have much more capacity and are better environmentally so
overall they are far superior to NiCd.)

Here's Eveready's list of NiMH characteristics:
Most cost-effective, economical power source over the life of the battery

Recharges up to a thousand times

Best suited for frequent usage and heavy-drain devices, such as digital
cameras

Good low temperature performance

Interchangeable with non-rechargeable batteries in the same size

Limited shelf-life—loses 1% of deliverable energy per day when stored at
room temperature

If StealthPilot's cells are discharging substantially in a week then
there's something seriously wrong with them and they should be replaced.

Stealth Pilot
shared these priceless pearls of wisdom:

-
-
-if you charge up a nicad it will retain the charge for quite some
-time.
-a NiMh battery by comparison will self discharge in about a week.
-they charge quicker but need to be fully charged just prior to use for
-the best effect.



Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

Peter wrote

It's not a heresy, just overstated. It's well-known that NiMH cells
suffer from much more self-discharge than alkaline

That's why I have switched back to the RAYOVAC Rechargeable Alkaline
(used to be called "Renewable Alkaline")for my seldom used applications
such as my YAESU Aviator Pro II. Yes, they make an optional back that
will hold six of any AA cells. These cells have a shelf-life like any
other Alkaline, but provided that they are not discharged too far, I
have recharged some of them probably a hundred times. Kinda hard to find
but I tracked them down in Walgreen Drug Stores.

Bob Moore

Robert Moore wrote:
That's why I have switched back to the RAYOVAC Rechargeable Alkaline
(used to be called "Renewable Alkaline")for my seldom used applications
such as my YAESU Aviator Pro II. Yes, they make an optional back that
will hold six of any AA cells. These cells have a shelf-life like any
other Alkaline, but provided that they are not discharged too far, I
have recharged some of them probably a hundred times. Kinda hard to find
but I tracked them down in Walgreen Drug Stores.

WARNING!!!
Do not leave RAYOVAC rechargeables in any device for an extended period.
They will leak and corrode your device.
They degrade with each recharge (this from a RAYOVAC tech).
NiMH, while they have a faster self-discharge rate, have more recharge
cycles and will not leak.

It's a few more
bucks,

Ahem! But I see that your self-rationalizing-mechanism works really
well.

Well, Thomas, I'll admit that the AvMap *was* a hard financial pill to
swallow, at over $1700.

However, when I saw what it could do, and realized that the cruddy little
(relatively speaking, of course) Garmin 295 was going to run me around
$1300, the $400 difference paled into insignificance.

I've now flown with the AvMap for over 100 hours. That extra four bucks an
hour (and dropping by the day) has been well worth it...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

I have to agree about the JRC JHP-500 , works great, easy to use and came
with a headset adapter. Used it for several years and I can't complain.

Ardna


"Paul Folbrecht" wrote in message
hlink.net...
OK.. we are tricking out our new (to us) 172...

"Tricking out"? I love it! Are you an ex-motocrosser or something?
Didn't think that euphamism was used in these here environs....

Looking at/comparing the ICOM IC-A23, and the Vertex Standard
VXA-210.

Well, I'll throw out that my JRC JHP-500 works great and is a good bit
cheaper than the ICOMs. I have no complaints.

I too was saddled with this question recently and bought the ICOM IC-A23
Sport. I figured it had a very good reputation and since I was planning to
use it as a backup, it was easier to carry a couple of sets of spare
alkaline batteries with me than worry about the last time I charged it. By
buying the sport, the price was quite reasonable. I also got (at the time a
rebate like offer) the headset adapter.

Other than testing it at my FBO and using it to listen to weather on the way
to the airport, I haven't had a need for it as of yet but feel very
comfortable having it within reach at all times.

As for a GPS, I have a Garmin 196 and find it totally adequate. Color while
nice, I don't think is worth the premium. Also the size is good and fits
nicely in my Cherokee with bow-tie yokes. I will note that the yoke mount
that Garmin ships would not work directly in the 172R's I trained in because
of the yoke shape. I'm not sure if this is a problem with all yokes, but it
required me to keep it on the passenger seat. Just as well, since I was
training at the time I really only used it to verify my checkpoints.

Hope this was of some help,

Tom


wrote in message
...
Hi All!

OK.. we are tricking out our new (to us) 172...

Looking at/comparing the ICOM IC-A23, and the Vertex Standard
VXA-210.

ICOM is more $, but a known quantity/quality.

Completely unfamiliar with Vertex quality/service..

Any experiences you would share with us?

And....

GPS....

The GARMIN 196 seems to be a fav, but we are attracted to the
features/screen size of the Lowrance Airmap 1000.

Short of "holding out" for a Colour 196 we are asking for
advice here as well..

Any owner/user comparisons/recommendations?

Thanks in advance....

Dave

Hi Jay...

Ok....tried it... (the AV demo..

But... only one dealer (in all North America !) listed... and
the link does not work.

Where did you get yours and how much?

And for what other reasons did you rule out the Lowrance?

Dave


On Sat, 21 Feb 2004 02:33:46 GMT, "Jay Honeck"
wrote:

Looking at/comparing the ICOM IC-A23, and the Vertex Standard
VXA-210.

I've got the ICOM. I've owned ICOMs since the early '90s. They are simple,
bullet-proof devices -- which is what I want in a back-up radio.

Jim Weir will tell you that the Vertex radios do some astoundingly cool
things, though.

Short of "holding out" for a Colour 196 we are asking for
advice here as well..

Any owner/user comparisons/recommendations?

I spent DAYS testing all of the GPS's at OSH '03. (Well, the Lowrance
Airmap 1000 was just "vaporware" at that stage -- but I ruled Lowrance out
for other reasons.) It was hell, but someone had to do it... ;-)

The best GPS on the market, hand's down, is the AvMap. It's a few more
bucks, but it's TWICE the GPS of any competitor. We've been very happy
with ours, and can honestly say it has changed the way we fly the plane.

See an on-line demo at http://www.avmap.it/index.php?sec=1&sub=45&lang=en

well ill throw in my $.02 even though im still technically a student. i
bought a Airmap 500 ($400 ebay) and am impressed w/ it. great on vfr flights
for double checking my checkpoints. think my cfi is debating on getting one
now. pretty easy to use too. although i need to get some tint for the screen
as its too bright at night. its well worth the money being $500 retail. the
HSI feature is great! and comes w/ all kinds of accesories in the box (yoke
mount dc adapter external antenna and mount map making software etc etc).
anyway i thought it was the best for the $500 price range after looking at
the few that are that inexpensive. may upgrade in the future once i get my
commercial certificate but for vfr its great. -Nick
"JJS" jschneider@REMOVE SOCKSpldi.net wrote in message
...
probably purchase the Airmap 500 or 1000 unless someone that owns one
of these units and doesn't like it changes my mind . It seems they

NiMH have a self-discharge rate of 3-5% per day. If you are going on
extended trips, purchase an alkaline battery pack.

You need to google about that to see for yourself. They self discharge at
slightly over 1% per day. Given the fact that they have a higher capacity
than alkaline, they will still have more capacity left over, even
considering self discharge, than alkalines for at least two or three weeks.

- I am the type of person to prepare by charging things often, so it is
ablsolutely no problem for me. If you do prepare for a long trip by
charging, you have around two times the capacity than alkaline, so where is
the down side? Add to that a charger to run off of ship's power, and you
can go long, indefinitely.
--
Jim in NC



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