ic boys.

"There doesn't seem to be a whole lot that I can tell you," remarked Frank
Brandon, after they had gone over everything in detail. "You seem to have
thought it out very thoroughly already, and outside of the few minor
things I've already told you, I can't think of much to suggest. It looks
to me as though you'd have a pretty good set there when you get through.

"There's one tip I want to give you though," he went on. "And that is to
be careful about your tuning. You've noticed, no doubt, that sometimes you
get first-class results, and then again the reception is so unsatisfactory
that you are disgusted. Now in nine times out of ten the whole trouble is
that you haven't tuned your receiver properly. You can't do the thing in a
haphazard fashion and get the signals clearly. You know what Michelangelo
said about 'trifles that make perfection.' Well, it's something like that
in tuning your receiver.

"Now I see that in this receiver you have separate controls for the
primary and secondary circuits. To tune in correctly you have to adjust
both circuits to the wave length of the special signal that you are trying
to get.

"First you start in with a tentative adjustment of the first primary. Fix
it, let us say, for between a third and a half of its maximum value. I see
that here the coupling between the primary and secondary is adjustable, so
place it at maximum at the start. Of course you know that maximum means
the position in which the windings are closest to each other.

"Then you fix up the secondary circuit for adjustment to the wave length,
turning it slowly from minimum to maximum until you come to the point
where the desired station is heard. When this is found, you again
readjust the primary until you find the point of maximum loudness.

"Now you see the advantage of this double control. If an interfering
station butts in, just decrease the coupling between primary and secondary
and then tune again the two circuits. You can feel pretty sure of cutting
out the interference and getting clearly just the station that you want."

"That's mighty good dope," said Bob. "I've had that trouble more than once
and haven't been quite clear as to the best way of getting around it."

"Then too," went on the radio expert, "you must be careful in adjusting
the tickler that gives the regenerative effect. Start in slowly by turning
the control knob toward the maximum. You'll soon strike a point where the
signal will b