[NJARC] Building a B Battery for a portable

Tue Oct 9 21:41:06 EDT 2018

Hi Joe,

I found these coin tubes on Amazon. 
<https://smile.amazon.com/STORAGE-TUBES-plastic-NICKELS-Quantity/dp/B000PH8ILQ/ref=sr_1_1?ie=UTF8&qid=1539118084&sr=8-1&keywords=coin+tubes+plastic+nickle>
US Nickels are 21.21 mm in diameter, so 20 mm coin cells should be a 
good fit.

I'm not finding much on Google, you may be on your own, but we're 
following along with interest.

Al

On 10/9/2018 7:37 PM, Joe Giliberti wrote:
> The radio in question is approximately 7 inches wide by 4 tall by 2 
> deep. The tube compliment is 1R5, 1T4, 1U5 and 3S4
>
> I had pretty much the same idea of using a tube to stack 2032 cells 
> and tensioning with a spring. Was just wondering if there was 
> precedent or if I was in unknown territory.
>
> On Tue, Oct 9, 2018, 3:13 PM Al Klase <ark at ar88.net 
> <mailto:ark at ar88.net>> wrote:
>
>     Just remember
>     Reply = Poster
>     Reply All = Everyone
>
>     _________________________________________________________
>     Joe and Bill,
>
>     Bill:  I think you have a typo:  " At 190 ma drain they would give
>     you about 900 hours use"  Data sheet says capacity is 235 mAh.  I
>     think you tripped over "0.19 _mA_" on the datasheet.
>
>     Surprisingly, my quick calculation for a radio using 1R5, 1T4,
>     1S5, and 3V4 at 67.5 volts is 19 mA.  That would be 235/19 =12.4
>     hours.  I thunk that's pretty acceptable.   In bulk there are
>     cheap like 12-cents. EBAY
>     <https://www.ebay.com/itm/100-PCS-CR2032-Lithium-Battery-3V-Button-Cell-Digital-Scales-Calculators-Remote/142719064791?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D20150817211758%26meid%3D7f80520b0c8f4f40b3bca3d8c0ad1cf4%26pid%3D100507%26rk%3D1%26rkt%3D1%26%26itm%3D142719064791&_trksid=p2045573.c100507.m3226>,
>     23 cells @ $0.12 = $2.76.
>
>     If this is the Kent I think it might be, there isn't going to be
>     room for 7 9-volters.
>
>     I'd been thinking about using 2032 coin cells for this sort of
>     application, but never tried it.
>     My idea is to stack them in a tube, with a spring at one end to
>     provide tension. *Be careful of shorts*, you'll have a *LOT* of
>     current available for a short time! This is a little scary, could
>     it explode?  Might be a place for a fuse.
>
>     Let us know how you make out.
>
>     Al
>
>     On 10/9/2018 1:06 PM, William S Zukowski wrote:
>>     Just remember
>>     Reply = Poster
>>     Reply All = Everyone
>>
>>     _________________________________________________________
>>
>>
>>     Electrically I see no problem.  Might be a bit pricey though, as
>>     you would probably have to use batteries with tabs to enable
>>     connecting them in series, and using twenty three battery holders
>>     would require a "side car".
>>
>>     You could use the ubiquitous 2032, which due to modern battery
>>     chemistry would probably out perform the carbon zinc batteries of
>>     the 1960s.  At 190 ma drain they would give you about 900 hours
>>     use (not sure how much the radio draws).  See the attached 2032
>>     data sheet.
>>
>>     Bill
>>
>>     On 10/9/2018 12:18 PM, Joe Giliberti wrote:
>>>     Just remember
>>>     Reply = Poster
>>>     Reply All = Everyone
>>>
>>>     _________________________________________________________
>>>
>>>
>>>     Hey Everyone!
>>>     I have a Kent 4-tube portable radio that I'd like to get going.
>>>     It uses a D-cell A battery and an Eveready No. 416 67.5 volt B
>>>     battery. Aside from using a voltage booster, what can be used in
>>>     the small space I have available? Would twenty-three 3 volt coin
>>>     cells in series have enough amperage to get it going?
>>>
>>>     Thanks
>>>     Joe Giliberti
>>>
>>>
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>>
>>
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>
>     -- 
>     Al Klase – N3FRQ
>     Jersey City, NJ
>     http://www.skywaves.ar88.net/
>
>
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Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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