Yes, I'm using a PC640A (alkaline) in my 1/21 and that seems to be OK even although i suspect the voltage is too high (1.5v? vs 1.3v for mercury cells). Try it and see if you can arrange to compare your meter against another spotmeter just to make sure it doesn't read too high or low. In any case calibrating it would probably be a good idea - no need to fiddle with the internals so long as you know how much it is out by and can compensate appropriately.
Paul Ewins Melbourne, Australia ----- Original Message ----- From: "Bill Owens" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, December 18, 2001 8:16 AM Subject: Battery for Spotmeter > I just received my Pentax 1/21 Spotmeter from ebay. I want to replace both > batteries, one of which is a common 9V battery. The other battery appears > to be dead and is labeled "640". Does anybody know if this battery, or its > equivalent is still available? > > Bill, KG4LOV > [EMAIL PROTECTED] > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
