JRC JHP500 handheld transceiver

I have been trying to find the operator's manual or other documentation
for this unit on the web, but have not succeeded. If anyone can direct
me to a spot on the web where I can download it, I would be grateful.
Thanks.

bluenosepiperflyer wrote:
I have been trying to find the operator's manual or other documentation
for this unit on the web, but have not succeeded. If anyone can direct
me to a spot on the web where I can download it, I would be grateful.
Thanks.

I have an owners manual. Contact me and I can arrange to get it to you.

--
--------------------
Scott F. Migaldi
CP-ASEL-IA
N8116B

PADI MI-150972
Join the PADI Instructor Yahoo Group
http://groups.yahoo.com/group/PADI-Instructors/

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

I also have the same unit. Is there any reasonable way to replace the
original rechargable battery?

I also have the same unit. Is there any reasonable way to replace the
original rechargable battery?

If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

Where did you go? I'd love to try that.

In article om,
"Robert M. Gary" wrote:

If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

Where did you go? I'd love to try that.

I cannot remember which one. I checked prices at AirVenture and bought
the one with the best price. Look in any of the aviation mags, they
usually have ads. If you cannot find any there, I will look for my
business cards.

Lots of places re-cell battery packs.

http://www.batteriesplus.com

http://store.batteryspecialists.com

http://www.asisco.com/battery_rebuiltpacks.htm


"Robert M. Gary" wrote in message
ps.com...
If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

Where did you go? I'd love to try that.

On Wed, 26 Oct 2005 00:24:34 +0000, john smith wrote:

I also have the same unit. Is there any reasonable way to replace the
original rechargable battery?

If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

Be careful when switching to alternate battery technologies. NiCads are
designed to be charged at rates up to 3C while most NiMH are
typically designed to be charged no faster than 1 to 1.2C. As a rule of
thumb, NiCads charge FAST while NiMH charge slow but have much
larger capacities. Another important distinction between the two battery
types, when peak charging, each battery type indicates "full" differently.
Long of the short, if you change battery technologies, make sure you
change chargers too! Otherwise, you may be in for a surprise including
very short battery life, batteries which never hold a full charge, and
maybe even fires.


Greg

Greg Copeland writes:

On Wed, 26 Oct 2005 00:24:34 +0000, john smith wrote:

I also have the same unit. Is there any reasonable way to replace the
original rechargable battery?

If it is a detachable battery pack, there are several suppliers that can
swap the old pack for a new. I replaced a NiCd pack for a NiMH on an
ICOM.

Be careful when switching to alternate battery technologies. NiCads are
designed to be charged at rates up to 3C while most NiMH are
typically designed to be charged no faster than 1 to 1.2C. As a rule of
thumb, NiCads charge FAST while NiMH charge slow but have much
larger capacities. Another important distinction between the two battery
types, when peak charging, each battery type indicates "full" differently.
Long of the short, if you change battery technologies, make sure you
change chargers too! Otherwise, you may be in for a surprise including
very short battery life, batteries which never hold a full charge, and
maybe even fires.

All my NiMH chargers claim to be able to charge NiCD batteries too;
are they lying to me? Or are there big compromises? This is
completely intellectual curiosity, since haven't used any AA NiCD
batteries in years.
--
David Dyer-Bennet, , http://www.dd-b.net/dd-b/
RKBA: http://noguns-nomoney.com/ http://www.dd-b.net/carry/
Pics: http://dd-b.lighthunters.net/ http://www.dd-b.net/dd-b/SnapshotAlbum/
Dragaera/Steven Brust: http://dragaera.info/

On Mon, 30 Jan 2006 10:40:05 -0600, David Dyer-Bennet wrote:

[snip]

All my NiMH chargers claim to be able to charge NiCD batteries too;
are they lying to me? Or are there big compromises? This is
completely intellectual curiosity, since haven't used any AA NiCD
batteries in years.

Well, you really didn't provide enough information to say one way or
another. But chances are, you're safe as along as it says it supports the
battery type. My own high-end DC charger must be told the type of battery
it is charging, when it is charging in peak mode. I suppose it's possible
that a charger can automatically detect both types of fall-off but it may
run a higher risk of a false positive. Keep in mind, that's a guess on
my part. Assuming it's peak charger, a false positive would mean the
battery did not get charged to capacity.

If it is a trickle charger, a false positive/negative means it's either
over or under charged. And frankly, trickle chargers are well known for
over charging batteries. Over charging a battery can result in everything
from simple cell damage (reduced capacity and lower supported discharge
loads) to an actual fire. Also, don't forget that damaged cells may cause
a fire during high load discharge cycles too. Which is to say, an
undamaged cell versus a damaged cell, is more prone is be a victim of
excessive heat build up, during high load cycles. Lastly, "high load" is
largely dependant on both the type of cell. Remember, not all rechargable
cells are equal.

As a rule of thumb, given your cells, if your cells are hot to the touch
during and immediately after use, the application is probaly high load for
them. Likewise, if during charging, your batteries are getting hot to the
touch, long before the charge cycle is complete, you might question if the
battery is being over charged...especially if it's a trickle charger.


Greg