"I have an expert radio
man visiting me here this evening. How would it be if I dropped
around some time during the evening, and brought him with me?"
"Fine!" exclaimed Bob, delighted at the prospect of talking with
an experienced radio man. "We'll all be looking for you, sir."
Bob was delighted over the doctor's promise, and told his friends
about it as soon as they arrived that evening. They were all
equally pleased.
"He can tell us just what we need to know," commented Joe. "You can
dig a lot of stuff out of books, but lots of times just the question
you want answered doesn't seem to be in them."
The boys had just raised the Newark station, end were listening to
the first number on the program, a soprano solo, when the minister
and his friend arrived. He introduced the stranger as Mr. Brandon,
and the latter immediately made himself at home.
"I hear you fellows got your set working first crack out of the box,"
he said, as they were going upstairs. "You're luckier than I was with
my first one, because I had a lot of trouble before I got my first
signal through. I fooled around a long time before I found out what
the trouble was, too."
"What was it?" asked Bob.
"I finally found that the water pipes were insulated from the street
pipes, as they are in some houses, so that I really didn't have any
ground at all, even though my ground wire was connected with a pipe
in the bathroom.
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