Back in the "Good Old Days" Western Electric produced a number of products that used different lamp on/off cadences to indicate various circuit conditions. 1A and 1A2, for example had a flash cadence (~500ms on, 500ms off) and a wink cadence (~250ms off, 750ms on). There was another cadence on some products that I recall being called "flutter" which had a very rapid on/off cycle. Does anyone know what the on/off time intervals of this cadence were?
Thanks in advance!
Al