Re: Zeiss Ikonta Shutter - Rapid and Synchro - both have flash?

<jjs> wrote in message 
news:13seve6aqb88of8@[EMAIL PROTECTED]
>
> "Richard Knoppow" <dickburk@[EMAIL PROTECTED]
> wrote in 
> message news:13serbt1qjvdl5c@[EMAIL PROTECTED]
>
>>     Just never fire a bulb off in your face... YIKES!!
>>     I agree about using solenoids for remote tripping. 
>> Silent and no limit on distance. Some shutters, 
>> particularly the Kodak Supermatic and Flash Supermatic, 
>> will not trip at 1/400 with just two batteries and 
>> sometimes not with three. This was a problem in the old 
>> days and extra-high-voltage photoflash batteries were 
>> made for just this purpose.
>
> Yup! I know. Radio-Shack, still offer the old 22.5V 
> batteries that those units used. This link shows a camera 
> that used the same.
> http://www.digoliardi.net/ks6/
>
> I had that set since 1968, and later sold that for a 
> bloody fortune. Sometimes life it good. :)
>
    The 22.5V batteries were used in several BC type 
flashguns including one of the Rolleiflash units. I don't 
think they were ever used for solenoid flash. The "high 
voltage" batteries I was talking about were standard Size-D 
cells with something special about the mix. They were enough 
higher than the standard 1.5V so that three of them in a 
standard flashgun would have enough extra oomph to deal with 
hard to trip shutters. I don't think these have been made 
for decades. I don't know what was done to them to increase 
the voltage but they had a reputation for having short life.
    When Wollensak came out with the Rapax shutter it was 
designed to eliminate this problem by having a constant and 
relatively low "trigger pull" at all speeds. Although 
Wollensak made some flakey lenses their shutters were always 
excellent.


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Richard Knoppow
Los Angeles, CA, USA
dickburk@[EMAIL PROTECTED]