I might have been looking for the trouble yet if a
friend of mine hadn't given me a tip what to look for."
By this time they had reached Bob's room, and Dr. Dale and Mr. Brandon
inspected the boys' outfit with great interest.
"Pretty good for beginners, isn't it, Brandon?" said the minister
at length, when they had gone over the thing at length and Bob had
explained the way they had made the different units.
"I should say so," acquiesced the expert. "They've made up one of
the neatest amateur jobs I've seen in a long time. Let's see how it
sounds."
He and the doctor donned head phones, and Mr. Brandon manipulated the
tuning coil and the crystal detector with a deftness that spoke of
long experience. He showed the boys how they might get even clearer
and louder tones than any they had yet obtained by adjusting the
detector until the best possible contact was obtained with the
crystal.
"You could hear better with a more elaborate set, of course," he said,
"but you get mighty good results with what you've got. Of course,
you're range is limited to less than two hundred miles with this set,
and your tuning range is limited, too. But you've made a fine start,
and with this as a foundation you can go on adding equipment, if you
like, until you have a first class receiving station."
"Yes, and after we get a little more experience, we want to try our
hand at sending, too," said Joe.
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