I have a canon 70D I was trying to use with a Novatron head/pack lighting kit. Attached the Wein Safe Sync to the hot shoe of the camera, plugged the PC sync cable into it and then into the pack. Flashes didn't fire. Tried it on an older 10D and it worked fine.
Mounted a Canon speedlight on the hot shoe and that worked fine. Using the built in flash to wirelessly trigger Canon speedlights works fine. Tried different settings such as turning off Wi-Fi, messing around with the flash settings. No luck.
Any idea what's going on? Any other suggestions? Has anyone had this work attaching a PC sync cable to the 70D via a hot shoe adapter?