[NJARC] Building a B Battery for a portable

[Joe Giliberti]

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> wrote:

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> 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:
>
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>
>
>
> 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
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> _________________________________________________________
>
>
>
> 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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> --
> Al Klase – N3FRQ
> Jersey City, NJhttp://www.skywaves.ar88.net/
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