I believe that an old system called a ringing transformer was used by the telephone company to convert 60 hz 120 v to 20hz 40 volt AC
it used 2 transformers 2 transistors and 2 large capacitors and many small resistors and no ICs.
I want to build one for a discrete 400 hz. I have the original one at 20 hz and the wave shape is excellent
so I wonder if someone would send me the wiring diagram I would appreciate it
Many thanks. Jeff
it used 2 transformers 2 transistors and 2 large capacitors and many small resistors and no ICs.
I want to build one for a discrete 400 hz. I have the original one at 20 hz and the wave shape is excellent
so I wonder if someone would send me the wiring diagram I would appreciate it
Many thanks. Jeff