At 11:31 AM 8/5/2002 +0200, you wrote:
Hi,
As I said a few days ago I still have PX625 Hg
on my OM-1n body.
It seems that MR-9 Zinc/Air not last very long.
And I found that about criscam MR-9 replacement kit :
http://members.aol.com/drwyn/myhomepage/webdoc4.htm
about a N*k*n F camera.
What are your experiences about MR-9 replacement kit
from criscam or others sources on OM-1n bodies ?
Could we choose the type (SR44 or SR43) of the battery
to place in these MR-9 replacement kits ?
Both John Lind and I posted on this topic a couple days ago. I guess you
didn't see it?
First, to be clear: the MR-9 has no application with zinc-air
batteries. Zinc air batteries are already about 1.4 volts, which is
sufficiently close for some people to use as a replacement for the Hg
cells. The MR-9 is a casing with a diode in it that with a 1.5 volt
silver-oxide cell and produces an output (1.35 v) suitable for running the
meter of an OM-1/1N.
The type of MR-9 units being sold now take a SR43/386 cell. Older units
were designed to take an SR44/357 cell. I believe that the newer MR-9
units are brushed metal, whereas the older MR-9's that take the SR44 are
polished. I am still trying to get confirmation of this.
(To make matters more confusing, I learned from a Japanese friend who went
to the manufacturer's website -- not Criscam, which is a distributor --
that there are at least three different MR-9's which have been made. In
addition to the two mentioned, there was apparently a third which must have
replaced 1.5 volt Hg cells. So this unit probably has no diode. I have
never seen one.)
If you buy a MR-9 new, it will say on the package to use an SR43
battery. If you buy one used, I am guessing that if it is brushed metal
finish, it takes an SR43. If it is polished metal, it takes a SR44.
Perhaps someone else who has both will confirm or deny this?
Joel W.
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