NRO

[wb5mmb]

Here is a reading list on PX625 battery replacements. My take is the 
675 zinc air hearing aid battery is the best short term solution. 
After the NRAO trip most of the cameras will go back in the closet. 
The shelf life of the 675s are supposed to be around 5 years if the 
tab is not pulled. The best long term solution seems to be silver 
oxide with a diode to drop the voltage.

http://rick_oleson.tripod.com/batt_adapt_us.pdf
http://www.acecam.com/photography/5591.html
http://silverbased.org/zinc-mercury-replacement/
http://silverbased.org/zinc-air-voltage/

      Sandy

At 10:20 AM 7/13/2010, Frank Gentges wrote:
>Tom,
>
>I have a Canon FT, SLR, which uses the type 625 mercury battery.  I 
>found one seller that has a zinc-air battery that has very similar 
>voltage but.....
>
>The zinc-air is activated by pulling a little piece of tape off the 
>cell that lets air in to start the chemistry.  I do not think the 
>cell lasts very long once activated.
>
>Batteries Plus is selling a Duracell photo battery type PX625ABPK 
>which lists as fitting Canon cameras.
>
>Rob found a site selling a type PR44 cell with a machined adapter to 
>fit where the 625 used to fit.  I kinda like this as it solves the 
>problem forever more.
>
>I am going by my favorite battery store, Walmart, and see what they have.
>
>So many choices......
>
>Frank K0BRA
>
>










>On 7/13/2010 9:15 AM, Tom Azlin N4ZPT wrote:
>>NRAO ???
>>
>>I have an old Cannon SLR film camera and lenses. Perhaps I will 
>>dust them off and make sure they are working. Hope to not have a 
>>problem finding the battery!
>>
>>73, tom n4zpt
>>
>>On 7/12/2010 8:22 PM, wb5mmb wrote:
>>>
>>><http://news.discovery.com/space/the-quiet-zone-avoiding-radio-interference-at-all-costs-part-1.html>http://news.discovery.com/space/the-quiet-zone-avoiding-radio-interference-at-all-costs-part-1.html 
>>>
>>>
>>>http://news.discovery.com/space/the-quiet-zone-hunting-that-radio-noise-part-2.html 
>>>
>>>
>>>
>>>Note the part about cameras.
>>>Sandy
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