The trigger voltage for my Vivitar 283 made in Korea is about 6 volts. Earlier Vivitar 283 made in Japan by National at the beginning of '70s had something from the previous Vivitar 260 flash model made by National too, the 260 used a 9v battery and a high trigger voltage, it was reduced for the units made in Korea and China, anyway a test with a digital multimeter is not a bad idea.- Carlos --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list