I am seeking a royalty free picture of:
A carbon microphone, the kind the screwed into the mouthpiece of older telephones. An old speaker with and electromagnet from a 1930's radio. If you have one of these things and could send me a picture I would be happy. Its for my cell phone adapter book. I am going to do the history of microphones and end with the amplified cartage electrolet which we will use. I will also do transformers and end with the audio transformer that we will use. I have all the picture I need here. Frank Znidarsic
