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07-11-2009, 07:03 AM   #16
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QuoteOriginally posted by Blue Quote
I'd like to here Eric Hendrickson make a statement about the Spot F meter.
x 2

Me too.

woof

07-11-2009, 09:11 AM   #17
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QuoteOriginally posted by ChrisPlatt Quote
PX625 mercury cells were rated at 1.35V.

Chris
Exactly. I still have at least one still in the blister pack.


Last edited by Blue; 07-11-2009 at 09:28 AM.
07-12-2009, 05:09 AM   #18
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QuoteOriginally posted by Blue Quote
Exactly. I still have at least one still in the blister pack.
Ray, you are a true collector.

I have one in package too. I've thought about seeing what it would fetch on eBay...

woof
07-12-2009, 06:37 AM   #19
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QuoteOriginally posted by Blue Quote
I'd like to here Eric Hendrickson make a statement about the Spot F meter.
AFAIK Eric doesn't monitor Pentaxforums, so I wouldn't hold my breath waiting for one.
You might email him and ask though...

Chris

07-12-2009, 08:49 AM   #20
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QuoteOriginally posted by ChrisPlatt Quote
AFAIK Eric doesn't monitor Pentaxforums, so I wouldn't hold my breath waiting for one.
You might email him and ask though...

Chris
I didn't say he did. How ever, he does have an account here.
07-12-2009, 08:56 AM   #21
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QuoteOriginally posted by woof Quote
Ray, you are a true collector.

I have one in package too. I've thought about seeing what it would fetch on eBay...

woof

I keep it in a safe place because of possible contamination. However, I figure it is a good piece of info kind of like the old film cartridges and boxes that people have accumulated. I have wondered about ebay myself.
07-12-2009, 09:28 PM   #22
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QuoteOriginally posted by ChrisPlatt Quote
PX625 mercury cells were rated at 1.35V. Modern replacements are rated at 1.5V but will work fine in the Spotmatic F.
The silver-oxide cell is harder to find and more expensive than the alkaline, but has more stable output and lasts longer.

Chris
Apologies, my bad. I thought they had always been 1.5.
07-12-2009, 11:11 PM   #23
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The chances of a leak of mercury are slim, those energy-saving lightbulbs are far more dangerous.
Just don;t let the kids put the battery in their mouths

QuoteOriginally posted by Blue Quote
I keep it in a safe place because of possible contamination. However, I figure it is a good piece of info kind of like the old film cartridges and boxes that people have accumulated. I have wondered about ebay myself.


07-13-2009, 10:16 AM   #24
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Alkaline batteries will give inconsistent metering results toward the end of life. Silver Oxide batteries have a much flatter discharge curve that more closely matches that of the original mercury cells, and they last twice as long (as the alkalines).

Mercury = 1.35V
Alkaline = 1.5V
Silver Oxide 1.55V

All are usable in SP-F due to the bridge circuit which produces a differential output and is therefore voltage independent.
07-13-2009, 04:43 PM   #25
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IMO the silver-oxide cell is definitely worth the cost and extra effort to find.

Chris
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