battery for QL17

[thawkins]

Hello All - Just purchased a really neat QL17 frkom an e-bay seller. I put three rolls of film throught the camera and am really pleased overall with it. As it s a keeper I took it to my local camera repair shop for a CLA. The battery was replaced with a new 1.55 v PX 625A and now the exposure is off by 😕 two stops in bright conditions and about one stop or less in dim conditions. The rapairman states he checked the meter and it was accurate before it left the shop. Does this sound like a meter that needs adjustment for the 1.55v battery or do I have another problem?

 

[mr. mohaupt]

http://www.criscam.com/old/mr9.htm


for 30 bucks is it worth it?

or make your own
http://www.buhla.de/Foto/eQuecksilber.html scroll down a bit or go to page 6-8 on this pdf http://www.buhla.de/Foto/batt-adapt-US.pdf

~Mike

 

[bmattock]

It is worth it if you feel it is. It works, if that is your question. There are others as well, including some made by a fellow RFF'er in the UK, as I recall. You can also use zinc-air hearing aid batteries, which are 1.4 volts. Or you can adjust the ISO by two stops. Or you can use an external meter and ignore the internal meter. Or you can use sunny 16, as some RFF's claim to have calibrated eyeballs.

But whatever you do, that's a good solution for you. It is 'worth it' if you think it is.

Best Regards,

Bill Mattocks

 

[Flinor]

I've been using the MR-9 adaptor in many cameras for the last few years and the work fine. There are times that I've got a $30 adaptor in a $20 camera, but as Bill says, it's worth it to me for the lack of hassle.

 

[sockdaddy]

does that MR-9 adapter fit into the QL-17 - and if so what battery does it take then? what is the exposure / meter compensation at that point?

 

[mr. mohaupt]

Since I am in college I decided to see if I can get an electrical engineer put one together for me. If not I will invest 30 bucks on the 30 dollar camera I am getting 😀


~Mike



sockdaddy
No need for adjustment after you purchase the adapter, just plug and play. All it is, is a schottky diode if I understand. Just regulates and reduced the Voltage.

"have a lower forward voltage drop than a normal PN junction, because they are constructed from a metal to semiconductor contact. Their forward voltage drop at forward currents of about 1 mA is in the range 0.15 V to 0.45 V, which makes them useful in voltage clamping applications and prevention of transistor saturation. They can also be used as low loss rectifiers although their reverse leakage current is generally much higher than non Schottky rectifiers. Schottky diodes are majority carrier devices and so do not suffer from minority carrier storage problems that slow down most normal diodes. They also tend to have much lower junction capacitance than PN diodes and this contributes towards their high switching speed and their suitability in high speed circuits and RF devices such as mixers and detectors."

accordind to Wikipedia

 

[Fedzilla_Bob]

Or take the lazy guys approach-

http://cgi.ebay.com/Wein-Cell-PX625...610347710QQcategoryZ43479QQrdZ1QQcmdZViewItem

I have no affiliation with the seller. I have one in the fridge and one in a camera.

 

[sockdaddy]

how long do those Wein cells last?

 

[Creagerj]

I find it eiser to use the zinc air 1.35 volt battery availble from interstatebatteries.com. Sure their kind of spendy, but the batteries last a while, and have a shelf life of 10 years.

 

[derevaun]

I read some instructions around here somewhere for soldering a diode onto the positive (or was it negative?) battery wire. I did it and it works, but the heat from the soldering iron destroyed the plastic battery holder. We don't need no stinking resale value anyway.

 

[gitarzan]

I just use size 675 zinc-air hearing aid batteries in my Canonet Giii 1.7. I've folded a small peice of aluminum foil to shim it snugly. It's works fine if not for long.

 

[sockdaddy]

i ordered one of the Wein Cells from the eB@y link listed above - and it came today. that's great shipping for the price.

installed the battery in my GIII this afternoon, and it looks like the meter is consistently 1 stop less than the settings it was reading with the old battery in there (625 U - whatever that means). i'm excited to have another stop to work with on the meter, especially indoors.

 

[Pherdinand]

Or take the lazy guys approach-

http://cgi.ebay.com/Wein-Cell-PX625...610347710QQcategoryZ43479QQrdZ1QQcmdZViewItem

I have no affiliation with the seller. I have one in the fridge and one in a camera.

I understand the one in the fridge, you might have a large fridge, but how do you put a seller in a camera?

 

[Pherdinand]

sockdaddy, i wonder if you checked immediatley after installing the battery.
The zinc-air i bought had to be äctivated" by removing a sticker from the holes, and it needed stg like 20-30 minutes to start working properly.

 

[Pherdinand]

By the way, on a flea market two weeks ago i have found a px675 (the original,mercury)unopened in package. I wonder if it's still good, cost me 2 euro. There were several other mercury-based batteries but no 625 or others that would have been interesting for any camera i know about.

 

[vladhed]

why d'ya have to be so complicate?

why d'ya have to be so complicate?

I just use standard Silver Oxide batteries (376) with a bit of tin foil and set the film to 2/3 of a stop slower (e.g. set ISO 260 for ISO 400 film).

 

[willie_901]

My most recent Wein battery for the Canonet lasted three months.

willie

 

[gitarzan]

You can force the washer off the Wein battery and press it onto 675 hearing aid batteries. (at least you could last time I did it a few years ago)

That way you can use a $5 six pack of hearing batts.