I had this problem a few years back with a 14" Wollensak Veritar in a #5 Alphax shutter. At first I thought that there was something wrong with the shutter and took it to a local photo store that also repaired shutters. Nothing was wrong with the shutter - just needed a "long throw" cable release to trigger it. They had a drawer full of used releases and we tried several but none had a long enough throw. They we tried a new release and it worked! It's been years but I believe this is the one: https://www.bhphotovideo.com/c/produ...ease_with.html
Thomas
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