[Motorola] NTN1171A Rapid Charger for HT1000 Radios

Sat Jul 5 21:32:36 EDT 2014

Go to eBay and search for WPLN4111.

eric lemmon <wb6fly at verizon.net> wrote:

>The link you provided is no longer valid.
>
>-----Original Message-----
>From: Motorola [mailto:motorola-bounces at mailman.qth.net] On Behalf Of
>tvsjr at tvsjr.com
>Sent: Saturday, July 5, 2014 2:09 PM
>To: 'Discussion of equipment manufactured by Motorola'
>Subject: Re: [Motorola] NTN1171A Rapid Charger for HT1000 Radios
>
>The 1171s are NiCd only. Even for NiCd, they were a poorly designed charger
>and were prone to failures (the transformer brick going wonky and generating
>improper voltage was a favorite)
>
>The NTN1168, then the NTN7209, then the RPX4747 charger (all styled
>IntelliCharger 2) were released when the factory NiMH batteries for Jedi
>became available. There were aftermarket NiMH batteries for Jedi that came
>out before the newer chargers did... these were all poorly regarded, likely
>because they were charged with 1171s!
>
>These days, the right answer is to buy the WPLN4111 impres charger. This
>will safely charge both "dumb" and impres batteries in the NiCd, NiMH, and
>LiIon flavors. You can charge anything from Jedi forward to XTS5000, plus
>Saber, in these natively... adapters are available for APX and Visar (for
>KVL3000/3K+). Just make sure the firmware version is at least 3.40,
>preferably 3.90. Flashing these isn't hard, but it requires a special $150
>box that is rather uncommon unless you find someone who has a large fleet of
>impres hardware to maintain. There are several up on ebay, for instance:
>http://www.ebay.com/itm/Motorola-IMPRES-Battery-Charger-Model-WPLN4114AR-NIB
>-V3-90-/321413232429?pt=US_Radio_Comm_Device_Batteries_Chargers&hash=item4ad
>5b8b72d
>
>-tvs
>
>
>-----Original Message-----
>From: Motorola [mailto:motorola-bounces at mailman.qth.net] On Behalf Of eric
>lemmon
>Sent: Saturday, July 05, 2014 3:48 PM
>To: 'Discussion of equipment manufactured by Motorola'
>Subject: Re: [Motorola] NTN1171A Rapid Charger for HT1000 Radios
>
>Scott,
>
>Thanks for the response.  I, too, know of folks charging NiMH batteries with
>the 1171A charger, but Motorola states unequivocally that the 1171A is for
>NiCd batteries only, and has been replaced by the RPX4747A for NiMH and
>NiCd.  The three-contact models do, in fact, monitor the temperature sensor
>inside NiCd batteries.  However, as Bob Meister wrote in a Repeater-Builder
>article, the trip points in some such chargers must be modified to avoid
>damaging a NiMH battery, unless the charger can detect which battery
>chemistry is in the pocket.
>
>Before even experimenting with an expensive NiMH battery, I'd like to know
>whether the four-contact NTN1171A is an early production version of the
>RPX4747A charger that is appropriate for NiMH, or not.
>
>Monday morning, I will open a case on MOL to get Motorola to answer the
>question.
>
>73, Eric Lemmon WB6FLY
>
>
>
>-----Original Message-----
>From: Motorola [mailto:motorola-bounces at mailman.qth.net] On Behalf Of KB0NLY
>Sent: Saturday, July 5, 2014 10:28 AM
>To: Discussion of equipment manufactured by Motorola
>Subject: Re: [Motorola] NTN1171A Rapid Charger for HT1000 Radios
>
>I know of 1171A's being used to charge NiMH batteries but I don't know for
>sure if its Motorola recommended.  I do know that generally the ones with
>four contacts are rapid chargers with the thermal sensor input that can
>handle NiMH, the three contact models are just dumb slow chargers though
>some of the three contact models had a circuit in them that would light an
>LED and turn it green based on battery voltage or current draw to indicate
>fully charged, its been a long time since I went over the schematics for
>one.
>
>One thing I always hated about the 1171A is that when the light goes green
>the battery is only about 80% charged, so most people that are in a hurry to
>charge it won't ever fully charge the battery.  You have to let it go green
>then wait another hour or so.  What I would do is put your NiMH battery in
>the 1171A and closely monitor it and see if it starts getting hot, if it
>does then don't use it for NiMH.  The NiMH chargers really only add a
>thermal sense input to let the charger know if the battery is too cold or
>too hot and stop charging.
>
>
>73,
>
>Scott KB0NLY
>
>
>-----Original Message-----
>From: eric lemmon
>Sent: Saturday, July 5, 2014 9:20 AM
>To: Motorola-Radius at yahoogroups.com ; 'Discussion of equipment manufactured
>by Motorola'
>Subject: [Motorola] NTN1171A Rapid Charger for HT1000 Radios
>
>I have several NTN1171A Rapid Chargers for HT1000 portable radios.  I
>noticed that some of them have four spring contacts while others have only
>three.  I opened one of each to see what was different.  The three-contact
>PCB has a part number of 8480648C01-P6, while the four-contact board has
>part number 766V-A.  There are significant differences between them in
>component count and layout.
>
>I know that the NTN1171A charger is to be used only with NiCd batteries, and
>was replaced by the RPX4747A charger, which can charge both NiCd and NiMH
>batteries.  The RPX4747A is now NLA, so I can't examine its PCB to see if it
>might resemble the 766V-A PCB.  Neither my HT1000 nor my Visar manuals
>include any information about the NTN1171A or the RPX4747A chargers.
>
>I am well aware that a NiMH battery can be toasted if placed in a NiCd-only
>charger, and I don't want to risk damaging a new NiMH aftermarket battery.
>I wonder: Is it possible that the four-spring version of the NTN1171A is
>actually an early embodiment of the RPX4747A?  Moreover, is it safe to use
>the four-spring NTN1171A to charge NiMH batteries?
>
>73, Eric Lemmon WB6FLY
>
>
>______________________________________________________________
>Motorola mailing list
>Home: http://mailman.qth.net/mailman/listinfo/motorola
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Motorola at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html 
>
>______________________________________________________________
>Motorola mailing list
>Home: http://mailman.qth.net/mailman/listinfo/motorola
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Motorola at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>
>______________________________________________________________
>Motorola mailing list
>Home: http://mailman.qth.net/mailman/listinfo/motorola
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Motorola at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>
>______________________________________________________________
>Motorola mailing list
>Home: http://mailman.qth.net/mailman/listinfo/motorola
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Motorola at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>
>______________________________________________________________
>Motorola mailing list
>Home: http://mailman.qth.net/mailman/listinfo/motorola
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Motorola at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html