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[OM] Re: battery voltage

Subject: [OM] Re: battery voltage
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Tue, 08 Jan 2008 08:45:29 -0500
Alkaline 1.55V battery by itself introduces more error than can be 
dialed out with the meter eccentric. Also, results are non-linear and 
battery loses voltage as soon as you start to use it. A calibrated meter 
quickly goes out of adjustment. It's for these reasons that I never 
recommend the alkaline battery (625A, 625U).

With the silver oxide battery (357, 303, MS76, KS76, SR44W, G13) ditto 
on too much error to dial out if used without the diode (1N6263) and 
(also without diode) meter is non linear.  Ex.: If adjusted to be good 
at BV12 (asa 100, 1/125th @ f5.6), it'll be close at BV9 but probably 
off (needle high, underexposing) a full stop at BV15.

If meter is accurate and you're not getting an overhaul, the next best 
thing is using an MR9 adapter with the 386 silver oxide battery. I sell 
them if you are interested.

http://www.zuiko.com/index_016.htm

___________________________________
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington NY 11743
631-424-2121 | Olympus OM Service since 1977
http://www.zuiko.com  |  omtech1 AT verizon.net


Robert McFetridge wrote:
> On a slightly different note I am curious how everyone is dealing  
> with their battery in the OM1. It looks like my last 1.35V mercury is  
> on its last legs in my first OM1 and I have a 1.5V in my OM1n ( sort  
> of compensate about a stop). I also keep a Wein cell as a spare but  
> do not care for them. Can the cameras take an easy adjustment to work  
> with the 1.5V cells?
> Bob
> 

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