[rollei_list] Re: Hearing Aid Batteries in Nikon F
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 3 Mar 2010 18:06:26 -0500
Here's another source... SO very flat according to them:
http://www.jaycar.com.au/images_uploaded/battprim.pdf
Eric Goldstein
--
On Wed, Mar 3, 2010 at 6:00 PM, Eric Goldstein <egoldste@xxxxxxxxx> wrote:
> Hi Stephen/Richard -
>
> Here is one source (watch applications) to judge for yourself:
>
> http://members.iinet.net.au/~fotoplot/accbatcc.htm#dc
>
> Eric Goldstein
>
> On Wed, Mar 3, 2010 at 5:52 PM, <stephen@xxxxxxxxxxxxxxxxxx> wrote:
>> Hi Richard:
>>
>> You are correct, silver does not have as flat a discharge curve as mercury.
>>
>> In practice, though, it hardly matters. I even use 1.5v alkalines in my
>> original Photomic. Horrors!
>>
>> -----Original Message-----
>> From: Richard Knoppow [mailto:dickburk@xxxxxxxxxxxxx]
>> Sent: Wednesday, March 3, 2010 02:50 AM
>> To: rollei_list@xxxxxxxxxxxxx
>> Subject: [rollei_list] Re: Hearing Aid Batteries in Nikon F
>>
>> ----- Original Message ----- From: "Stephen Attaway" To: Sent: Tuesday,
>> March 02, 2010 8:04 PM Subject: [rollei_list] Re: Hearing Aid Batteries in
>> Nikon F > Hi Richard: > > If you send your Nikon F to Robert Decker
>> (drwyn@xxxxxxx), > he can convert it to use 1.5v silver cells. > > I've had
>> him do several of my oldies and they work fine. > --- > Rollei List Thanks
>> for the tip. I am not sure whether silver oxide cells have as flat a voltage
>> characteristic as zinc air cells. It is the constancy of voltage which is
>> important. Very few of the devices that use mercury cells have any sort of
>> voltage regulation in them; they depend on the properties of the mercury
>> cell. If the voltage is not constant adjusting the meter to read right with
>> a fresh cell means it will drift off as the voltage drops. My research on
>> currently available cells indicates that the zinc-air cell comes closes to
>> the mercury cell in the flatness of its voltage output. It is simply not as
>> long lived. Mercury cells were used in some peculiar applications. A common
>> one was as bias cells in electronic equipment which ran on batteries.
>> Obtaining the bias from the cell allowed more of the main battery voltage to
>> be applied elsewhere. These cells were often soldered in because they
>> operated with essentially no load and would last for decades. -- Richard
>> Knoppow Los Angeles, CA, USA dickburk@xxxxxxxxxxxxx --- Rollei List - Post
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