[NTLK] 2000 battery pack temperature switch

[Christian Burk]

Hi, Forrest,
Thanks so very much. I am definitely on the very beginning of the learning
curve with the kind of electronics tinkering keeping a Newton going
requires, so your advice is just as welcome as your generosity.

I am replying in the thread to confirm that it's totally cool to keep this
message visible to all list members.
Yours,
Christian

On Fri, Sep 29, 2023 at 2:37 PM Forrest <newton_phoenix at mindspring.com>
wrote:

> Hi Christian,
>
> In the spirit of how we do things in NewtonTalk—there would be no charge
> to mail that off to you. It might be a day or so until I can ship that off,
> though.
>
> I know I have one, I might also have a second one I could include as
> well—or perhaps one that I had already done. I’ll see if it still works…I
> stopped using it because it was just easier to go with the AA sled and
> Ni-MH cells. It is a bit tight in the MP2x00, so use care if you want to
> test it. That’s one of the reasons I stopped rebuilding them—with soldering
> tabs on the cells the fit was pretty tight. The cells vary in thickness,
> and the soldering tabs running alongside them in the case doesn’t help, but
> the tabs are just about a necessity as it is much easier to solder to them
> as opposed to the top and bottom of the cells; plus, continued exposure to
> the heat from the soldering iron or gun can damage their capacities. This
> is less of a problem with the tabs as there is less direct contact, and you
> can use a heat sink—I had a hemostat that clamped on there nicely between
> the Tab and cell.
>
> I am sharing this email thread with the rest of NewtonTalk. I hope that is
> agreeable with you.
>
> Mahalo,
> Forrest
>
> Sent from my T-Mobile iPhone 11
>
> On Sep 29, 2023, at 7:33 AM, Christian Burk <omahane at gmail.com> wrote:
>
> 
> Hi, Forrest,
> Given that I haven't actually opened up a battery pack myself and have
> seen what they look like before they are rebuilt, I would really like to
> get to have an actual pack, rather than parts. What would you charge to
> send me one?
> I'm in Omaha, Nebraska, USA.
> Yours,
> Chrstian
>
> On Thu, Sep 28, 2023 at 12:04 AM Forrest <newton_phoenix at mindspring.com>
> wrote:
>
>> I would add that the RMP is really nothing more than a metal disc. I
>> would go to the hardware store, get some thin sheet metal and simply cut a
>> new one and solder to that—that’s what I have done in the past with a
>> torn-up one like yours.
>>
>> It is enormously helpful that you have been to Frank’s site and have seen
>> what things are supposed to look like. A picture is indeed worth a thousand
>> words. Saves all the trouble of trying to describe what you should have and
>> apparently don’t. For example, I’ve not seen a thermistor that looks like
>> that with a small capacitor on the end, but again I’ve left mine stuck to
>> the white piece of tape and so have not seen one “naked”, so to speak.
>>
>> Mahalo,
>> Forrest
>>
>> Sent from my T-Mobile iPhone 11
>>
>> > On Sep 27, 2023, at 3:35 PM, Christian Burk <omahane at gmail.com> wrote:
>> >
>> > Thank you, Forrest,
>> >
>> > I will reach out to you directly about next steps, but I wanted to show
>> > what I was talking about to the whole list.
>> >
>> > Here are the batteries and the pack (after I removed the batteries):
>> >
>> https://www.dropbox.com/scl/fi/83eahk6k7dww12fg4q9vc/newon-2000-battery-pack-front.jpeg?rlkey=d7trs0i1yf6yenfnem2yrpsxq&dl=0
>> >
>> > Here are the batteries from the end that should have the temperature
>> switch
>> > but I don't think it's there. I am not actually sure. What I am sure
>> about
>> > is that one of the batteries looks like it leaked.
>> >
>> https://www.dropbox.com/scl/fi/if50ljcz6lflodhhdjqxo/newton-2000-battery-pack-temperature-switch-side.jpeg?rlkey=b8pu4mq5sukggmehlmubw9hvy&dl=0
>> >
>> > Here is the inside of the empty pack with what looks like a damaged
>> RMP, as
>> > it's called on the pda-soft site:
>> >
>> https://www.dropbox.com/scl/fi/ins2okyenvehp2bslkqln/newton-2000-battery-pack-inside.jpeg?rlkey=855oickpmepqfdu9yt1w0wbyl&dl=0
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>> >
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>>
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>
>