Page:Jack Heaton, Wireless Operator (Collins, 1919).djvu/55

 which part of the apparatus was the sender and which made up the receiver; this was the key; that the sending tuning coil, over here the condenser; under the table the transformer; on the wall the spark-gap; and altogether these make up the transmitter. This the crystal detector, the potentiometer, the tuning coil, the variable condenser and the head-phones make up the receiver and, finally the aerial switch, or throwover switch as it is called, the purpose of which is to enable the operator to connect the aerial with the transmitter or the receiver, depending on whether he wants to send or to receive.

I acted as if I had never seen a wireless set before; all went well until he had finished and then I let the cat out of the bag. He had a peculiar kind of a loose-coupled tuning coil that I had never seen before and I asked him how it was wound. He grinned at me with his big mouth and blue eyes and put out his open hand, palm side up.

“Put it there, pal,” he said. “I was a wireless kid myself once.” We shook hands and it put me next to the fact that all professional operators are not alike and at the same time it