|
I'm thinking that who ever started using the word vibrator for what folks these days associate with it must have worked with tube car radios.
If you have ever played with relays you would probably know that a relay can be made oscilate by wireing it such that the coil will be energised through it's switch contacts when ever it becomes unenergised. And if you know about coils then you know that they don't like changes in voltage (or is it curent?), and respond every time the switch opens by generating a strong magnetic pulse to try and counter the change. Another coil can be wound around the coil of our self oscillating relay to make that magnetic pulse into the sets unfiltered (often unrectified) B+ voltage.
I believe that is basically how a car radio vibrator works (correct me if I'm wrong).
Tom C.
|