Simon,
an adapter reduces the voltage by 0.2 V from 1.55 V to 1.35 V with a
Schottky diode (1N6263 o.a. ) and does not any kind of voltage
stabilization. So if the voltage of the silver cells drops down to 1.5
V, the adapter delivers 1.3 V. On the other hand, the voltage-over-time
characteristic of the silver cells are similar to the quicksilver cells,
both deliver a very constant voltage over their lifetime, and this is
the reason you can use the adapter with the 1.55 V silver cell for
replacing the quicksilver cell.
Charlie L.
Simon Worby wrote:
>I am about to send my father's OM-1 off for a CLA. The old chestnut of
>the battery "issue" reared its head.
>
>Both my father an I have a good stock of mercury cells in the fridge,
>hence we have no *need* for an adapter / re-calibration. This being the
>case, is it better to leave it at 1.35V? Or is it better to do something
>whilst it's in for the service anyway?
>
>Assuming a switch to 1.55V silver cells, is a re-calibration better, or
>is it better to use an adapter? I'm not an electronics expert, but IIRC
>the 1.55V cells drop in voltage over time, whereas the 1.35V cells stay
>constant almost till the end. This being the case, surely a
>re-calibration will mean the camera will give false readings as soon as
>the voltage drops slightly below 1.55V, whereas with an adapter reducing
>the voltage to 1.35V that voltage of 1.35V would stay constant until the
>1.55V cell was flat. Or have I got the wrong end of the stick?
>
>Thanks in advance.
>
>Simon
>
>
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