Re: [Repeater-Builder] Re: Genesis series bank charger question

2008-08-11 Thread Bob M. 
Yes, the IR thermometer will show a lower temp on the outside of the case than 
the cells are actually experiencing. However, it won't be too far off, and 
since the charger stops the rapid charge cycle at about 104 degrees Fahrenheit, 
a few more degrees one way or the other won't really make much of a difference. 
The temperature rise is also fairly slow, as in several minutes per degree even 
when the battery finally reaches full charge, so the thermal lag is minimal, 
even though the plastic doesn't transfer the internal cell temp very well.

Bob M.
==
--- On Mon, 8/11/08, Albert <[EMAIL PROTECTED]> wrote:

> From: Albert <[EMAIL PROTECTED]>
> Subject: [Repeater-Builder] Re: Genesis series bank charger question
> To: Repeater-Builder@yahoogroups.com
> Date: Monday, August 11, 2008, 10:04 AM
> Thank you all for the input. As always, I can trust that
> this group 
> has a wealth of distributed knowledge.
> 
> Allow me to respond to a few of your suggestinos and
> comments.
> 
> I did look through my P200 Radius manual (don't have it
> handy or I 
> would write down # of manual) and found a small section in
> the back 
> describing the theory of opperation regarding the bank
> charger. There 
> was also a schematic and expoded diagram. It was very
> enlightening. 
> The six slot charger is much more complicated than I
> thought. I am 
> glad I took digital circuits or else I would have been
> lost.
> 
> Thank you Mike for your comments on Bob's article. I
> had a feeling 
> that was the case. As I have researched, experiemented, and
> learned a 
> little more I came to the same realization. Either you
> could modify 
> the charger or modify the resistor and thermistor in the
> battery. I 
> guess manufactures have finally picked up on that and begun
> to 
> install different components in the packs.
> 
> So, this raises another question. Monitoring battery
> temperature 
> while charging. I guess the IR thermometer would be ok but
> I immagine 
> the batteries inside the shell would be a bit hotter than
> the outside 
> of the case. What would be a better way of monitoring
> battery 
> temperature in order to determine if the battery was
> charging 
> properly or not?
> 
> I guess I will leave the charger alone for now since the
> circuitry 
> seems different enough from the desktop fast charger that
> the same 
> modifications can't be made. Also, as stated above, the
> modifications 
> may not be necessary at all.
> 
> Thanks as always.
> 
> Albert
> KI4ORI
> 
> --- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ
> 
> <[EMAIL PROTECTED]> wrote:
> >
> > At 04:14 PM 08/10/08, you wrote:
> > >Hey guys, I am back with yet another Motorola
> Genesis series 
> question.
> > >I have acquired a 6 slot bank charger and would
> like to convert it
> > >over to handle NiMH batteries. I have done both my
> stand alone fast
> > >chargers and my MVA, but not the bank charger, but
> I immagine it
> > >shares at least some similarities with the others.
> I was wondering 
> if
> > >anyone would mind offering guidance?
> > >
> > >Thanks.
> > 
> > Note that the mod listed in Bob's article was
> required because of
> > the different thermal response of the NIMH cell
> chemistry, and the
> > fact that the manufacturer  of the particular
> batteries Bob received
> > used the thermistor intended for NICDs.
> > 
> > Different manufacturers may use different thermistors.
>  In some
> > cases no mod may be needed.
> > 
> > At one time the local Radio Shack had their hand-held
> remote IR
> > Thermal readout device for $20.  I wish I had
> purchased one then,
> > but by the time I heard about it they were out of
> stock.
> > See
> <http://www.radioshack.com/product/index.jsp?productId=2460852>
> > One of these would making the measurments mentioned in
> Bob's
> > article very easy.
> > 
> > Mike WA6ILQ

[Repeater-Builder] Re: Genesis series bank charger question

2008-08-11 Thread Albert 
Thank you all for the input. As always, I can trust that this group 
has a wealth of distributed knowledge.

Allow me to respond to a few of your suggestinos and comments.

I did look through my P200 Radius manual (don't have it handy or I 
would write down # of manual) and found a small section in the back 
describing the theory of opperation regarding the bank charger. There 
was also a schematic and expoded diagram. It was very enlightening. 
The six slot charger is much more complicated than I thought. I am 
glad I took digital circuits or else I would have been lost.

Thank you Mike for your comments on Bob's article. I had a feeling 
that was the case. As I have researched, experiemented, and learned a 
little more I came to the same realization. Either you could modify 
the charger or modify the resistor and thermistor in the battery. I 
guess manufactures have finally picked up on that and begun to 
install different components in the packs.

So, this raises another question. Monitoring battery temperature 
while charging. I guess the IR thermometer would be ok but I immagine 
the batteries inside the shell would be a bit hotter than the outside 
of the case. What would be a better way of monitoring battery 
temperature in order to determine if the battery was charging 
properly or not?

I guess I will leave the charger alone for now since the circuitry 
seems different enough from the desktop fast charger that the same 
modifications can't be made. Also, as stated above, the modifications 
may not be necessary at all.

Thanks as always.

Albert
KI4ORI




--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ 
<[EMAIL PROTECTED]> wrote:
>
> At 04:14 PM 08/10/08, you wrote:
> >Hey guys, I am back with yet another Motorola Genesis series 
question.
> >I have acquired a 6 slot bank charger and would like to convert it
> >over to handle NiMH batteries. I have done both my stand alone fast
> >chargers and my MVA, but not the bank charger, but I immagine it
> >shares at least some similarities with the others. I was wondering 
if
> >anyone would mind offering guidance?
> >
> >Thanks.
> 
> Note that the mod listed in Bob's article was required because of
> the different thermal response of the NIMH cell chemistry, and the
> fact that the manufacturer  of the particular batteries Bob received
> used the thermistor intended for NICDs.
> 
> Different manufacturers may use different thermistors.  In some
> cases no mod may be needed.
> 
> At one time the local Radio Shack had their hand-held remote IR
> Thermal readout device for $20.  I wish I had purchased one then,
> but by the time I heard about it they were out of stock.
> See 
> One of these would making the measurments mentioned in Bob's
> article very easy.
> 
> Mike WA6ILQ
>

RE: [Repeater-Builder] Re: Genesis series bank charger question

2008-08-11 Thread Dave Gomberg 

At 18:47 8/10/2008, Eric Lemmon wrote:
Albert,  Don't bother calling Motorola Parts.  I found the manual 
number for the

NTN4668A:  6881106C66.  Unfortunately, it has only recently been cancelled
and is NLA.  Bummer!


Good news from Pacific Wireless 
Communications  800-327-1949   http://www.pwchi.com/parts_sale.htm


6881106C66 MULTI U CHGR INSTR MAN  2 avail3.77USD each



--
Dave Gomberg, San Francisco   NE5EE gomberg1 at wcf dot com
All addresses, phones, etc. at http://www.wcf.com/ham/info.html
-

RE: [Repeater-Builder] Re: Genesis series bank charger question

2008-08-10 Thread Eric Lemmon 
Albert,

Don't bother calling Motorola Parts.  I found the manual number for the
NTN4668A:  6881106C66.  Unfortunately, it has only recently been cancelled
and is NLA.  Bummer!

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Sunday, August 10, 2008 6:14 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Genesis series bank charger question

Albert,

Bob Meister has written an article which describes how to make the NiMH
modification:


I checked on MOL and found that the NTN4668 multi-charger is still in the
catalog, although it is now being sold in the "C" revision. If you don't
have the manual for your charger, call 800-422-4210 and order a copy from
Motorola Parts. Navigate through the telephone maze to Parts ID, and ask
what manual covers the NTN4668A multi-charger.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
[mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Albert
Sent: Sunday, August 10, 2008 5:22 PM
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
Subject: [Repeater-Builder] Re: Genesis series bank charger question

Eric and others, please pardon my brief moment of mental flatulence.
At this point in my hobby I should know to include those kinds of things.

The charger model number is NTN4668A 

--- In Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> , "Eric Lemmon" <[EMAIL PROTECTED]>
wrote:
>
> Albert,
> 
> What is the complete model number of your charger? There are several
> different versions of the multi-charger.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> 
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Albert
> Sent: Sunday, August 10, 2008 4:15 PM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> 
> Subject: [Repeater-Builder] Genesis series bank charger question
> 
> Hey guys, I am back with yet another Motorola Genesis series question.
> I have acquired a 6 slot bank charger and would like to convert it
> over to handle NiMH batteries. I have done both my stand alone fast
> chargers and my MVA, but not the bank charger, but I immagine it
> shares at least some similarities with the others. I was wondering if
> anyone would mind offering guidance?
> 
> Thanks.
>

RE: [Repeater-Builder] Re: Genesis series bank charger question

2008-08-10 Thread Eric Lemmon 
Albert,

Bob Meister has written an article which describes how to make the NiMH
modification:


I checked on MOL and found that the NTN4668 multi-charger is still in the
catalog, although it is now being sold in the "C" revision.  If you don't
have the manual for your charger, call 800-422-4210 and order a copy from
Motorola Parts.  Navigate through the telephone maze to Parts ID, and ask
what manual covers the NTN4668A multi-charger.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Albert
Sent: Sunday, August 10, 2008 5:22 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Genesis series bank charger question

Eric and others, please pardon my brief moment of mental flatulence.
At this point in my hobby I should know to include those kinds of things.

The charger model number is NTN4668A 

--- In Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> , "Eric Lemmon" <[EMAIL PROTECTED]>
wrote:
>
> Albert,
> 
> What is the complete model number of your charger? There are several
> different versions of the multi-charger.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Albert
> Sent: Sunday, August 10, 2008 4:15 PM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> Subject: [Repeater-Builder] Genesis series bank charger question
> 
> Hey guys, I am back with yet another Motorola Genesis series question.
> I have acquired a 6 slot bank charger and would like to convert it
> over to handle NiMH batteries. I have done both my stand alone fast
> chargers and my MVA, but not the bank charger, but I immagine it
> shares at least some similarities with the others. I was wondering if
> anyone would mind offering guidance?
> 
> Thanks.
>

[Repeater-Builder] Re: Genesis series bank charger question

2008-08-10 Thread Albert 
Eric and others, please pardon my brief moment of mental flatulence.
At this point in my hobby I should know to include those kinds of things.

The charger model number is NTN4668A 






--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Albert,
> 
> What is the complete model number of your charger?  There are several
> different versions of the multi-charger.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Albert
> Sent: Sunday, August 10, 2008 4:15 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Genesis series bank charger question
> 
> Hey guys, I am back with yet another Motorola Genesis series question.
> I have acquired a 6 slot bank charger and would like to convert it
> over to handle NiMH batteries. I have done both my stand alone fast
> chargers and my MVA, but not the bank charger, but I immagine it
> shares at least some similarities with the others. I was wondering if
> anyone would mind offering guidance?
> 
> Thanks.
>