Shutter how do you do the test

[smithdoor]

You can use your sound card on PC and a photo transistor with some work.

Dave

[smithdoor]

Found a program for windows pc use and using the mic jack

http://cameraego.com/html/the_program.html
http://cameraego.com/html/running.html

[smithdoor]

Schematic for mic jack

[smithdoor]

This one looks to be the best and very low cost
http://lalob.info/?page_id=66
http://lalob.info/?page_id=69
http://lalob.info/?page_id=72

This show how to better but the mic jack is hard to make
http://www.davidrichert.com/sound_ca...ter_tester.htm

Software for both
http://audacity.sourceforge.net/download/windows

Dave

[smithdoor]

Just try this shutter test work great simple to build.
Screen was good after find out how to use the software
Try out on a Pearl Rive S4 and ever setting speed was right.
I use one Cadmium Sulfide and just a phone plug Radio Shack 276-1657

Dave

This one looks to be the best and very low cost
http://lalob.info/?page_id=66
http://lalob.info/?page_id=69
http://lalob.info/?page_id=72

This show how to better but the mic jack is hard to make
http://www.davidrichert.com/sound_ca...ter_tester.htm

Software for both
http://audacity.sourceforge.net/download/windows

Dave

[smithdoor]

Here some more detail

[Roger Hesketh]

I have test shutters with clocks, lathe and motor just by taking a photo this is not hard to do. Most motor on no load run at 1800 or 3600 rpm does good job for high speeds. I was telling a member early this month on how to do this check. for slow speed check I use a lathe on slow speed it to has a known rpm. Clock is same way. Use a bright light a flash will NOT WORK

Dave


[This is off the
http://tech.groups.yahoo.com/group/c.../message/30439

If you can find a 78 rpm record player and record, your problem would be solved by seeing how many degrees a white line from the center point of the record traveled while the shutter was open.]

For those of us who still have access to a 78rpm turntable I for one would be grateful if you could let us into the secret please.

[Ari]

For those of us who still have access to a 78rpm turntable I for one would be grateful if you could let us into the secret please.

Me too; I've been itching to fire up the Victrola before heading out to have my fedora blocked at the local haberdasher's!

[Ari]

After that I will watch the Boston Americans play the Pittsburgh Pirates; I hear that Honus Wagner is a fine ball player.