MR Meter

<p>I have acquired a Leica system which includes an MR black meter. Athough it works, It appears that the meter has been exposed to damp conditions. The two setting dials appear to have some corrosion and they do not move independantly. Is it feasable to remove the two dials, clean them up and replace them. Or is there something more complicated in fixing the dials? <br>

Any suggestions are gratefully accepted.<br>

John G.</p>

Just remove the center screw from the dials, they come off easily, and can be cleaned, etc.

 

You might not even have to remove the screw completely, it's easy to overtighten the screw and disable independent movement of the dials.

<p>the innards of the MR is pretty dense. suggest professional help.. DAG will do the job and convert the meter to 625A batteries. Worth it. much to screw up in there.</p>

<p>the innards of the MR is pretty dense. suggest professional help.. DAG will do the job and convert the meter to 625A batteries. Worth it. much to screw up in there.</p>

<p>Isn't the 625a an alkaline. I have had one MR converted to use, I think, an alkaline replacement.& it works just fine.<br>

You can use the same air cell batteries as for hearing aids. I forget the precise voltage of the original mercury batteries, but they are the same. I have one fitted with one of these batteries, which reputably don't outlast a year, but I am sure it has been in longer than that & works OK.<br>

I have yet another that uses superannuated original mercury batteries, which just seem to last forever. They all work fine and agree with one another, but all periodically suffer from the original problem; too loose; too tight, which I can fix.<br>

The worst problem is when the meter needle tends to stick against the brake; that's when I would recommend a DAG type job.</p>

 

<p>Thanks to all for the information. Now I have to go looking for a small spanner wrench to loosen that screw. Then I can truly claim to have a screw loose.<br>

I just discovered that I have 18 days left on my Kodachrome. I will take out 1 roll (of 6) tonight and shoot like crazy (HI). Tomorrow I will call Dwaynes to see if my last few Kodachrome mailers are still good for the last few days. <br>

At least 1 of the rolls will feed the M4, perhaps a roll through my Retina (my almost first camera) and a roll through my last film Pentax for old times sake.<br>

John G.</p>

<p> </p>