Dynalite studio pack instructions:
"When the power pack is not in use for one month or more, it is wise to periodically plug the power pack in and turn it ON for a couple of hours. It is not necessary to operate a flash head during this “idling” time."
Metz speedlight instructions:
"Formation of the flash capacitor
"The built-in flash capacitor changes physically when stored for long periods of time without the application of a voltage; it deforms. To prevent deformation the capacitor should therefore be activated every three months by switching the unit on for about 15 minutes without firing flashes or by operating from the mains for 15 minutes using the mains unit N22."
Speedotron studio light instructions:
"Do not immediately fire the unit on the first use or when the unit has been
idle for periods over 3 weeks. Allow several minutes for the power
supply’s capacitors to form. Once this procedure has been followed at
these times, subsequent use of the power supply requires no waiting
The very first speedlight that I owned, Honeywell Strobonar, back in the late 1960's had similar instructions.
My speedlight and studio flash units, purchased new and now about 20 years old, are still operating fine because I follow the recommendations published.
Last edited by wiltw; 07-18-2012 at 08:55 PM. Click to view previous post history.