Originally Posted by Steve Smith
The opto thyristors in my cheap Cactus triggers are rated at 400 volts.
There is a German language FAQ for these Yongnuo RF602 radio triggers which claims 50V and 100mA as the absolute limit.
If this FAQ is correct, an old flash with typically 300V would likely destroy the receiver.
Trying to be the best of whatever I am, even if what I am is no good.