quadgram

This is a table of type quadgram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

quadgram frequency
at a in fig88
tom swift and his86
in the plate circuit86
one end of the85
at the same time81
the other post of80
the other end of75
shown at a in74
as shown in fig73
the end of the71
the rest of the64
of the tuning coil63
to one of the62
the current in the56
as shown at a56
the ends of the49
a vacuum tube detector48
the posts of the48
of the secondary coil47
on the other hand45
in the united states45
set up by the45
to be able to45
other end of the45
as shown in the44
one of the posts44
of the posts of44
as shown at b42
set up in the41
current in the plate41
the plate of the40
in the wiring diagram40
the radio boys at40
shown in the wiring40
the aerial wire system40
other post of the40
the terminals of the38
what do you mean38
one post of the38
of a vacuum tube37
the grid of the37
in the first place36
the oscillations set up36
the edge of the36
or sent postpaid on35
receipt of price by35
postpaid on receipt of35
as it is called35
sent postpaid on receipt35
sale by all booksellers35
the voltage of the35
of price by the35
with one of the35
price by the publishers35
of the primary coil35
as a matter of35
on receipt of price35
for sale by all35
at the end of34
of the variable condenser34
loose coupled tuning coil34
in front of the34
the side of the33
to do is to33
the vacuum tube detector33
by means of a33
looked at each other33
of the vacuum tube32
at the other end32
terminal of the filament32
other post of this32
the resistance of the32
in series with the31
is shown in fig31
at the rate of31
and the other end31
a stream of electrons31
the boy allies with30
a good deal of30
and the other post30
for the first time30
a matter of fact30
for a long time30
the center of the30
secondary coil of the30
he was going to30
at the sending station29
you will have to29
the secondary coil of29
what do you think29
the other terminal of29
of this with the28
in the grid circuit28
to connect them up28
the plate circuit of28
of the latter with28
how to connect them28
was one of the28
and how to connect28
the middle of the27
the other side of27
so that it will27
connecting up the apparatus26
the radio boys on26
it consists of a26
of the a battery26
the frequency of the26
the use of the26
the primary coil of26
the strength of the26
oscillations set up by26
in the midst of26
number of turns of26
one terminal of the25
in the case of25
radio corporation of america25
if you want to25
of the united states25
the fact that the25
to one end of24
is shown at a24
the parts and how24
with one post of24
end of the secondary24
the or positive electrode24
of the radio boys24
our young aeroplane scouts24
electrode of the a24
as shown at c24
vacuum tube detector receiving24
the direction of the24
tube detector receiving set24
parts and how to24
other end of this24
the radio boys with23
you are going to23
in connection with the23
i am going to23
for a few moments23
in the same way23
are set up in23
it seems to me22
in a low voice22
connecting up the parts22
the part of the22
primary coil of the22
magnetic lines of force22
the apparatus you need22
by the publishers a22
may be able to22
in the direction of22
at right angles to22
or positive electrode of22
end of the wire22
at b in fig22
the filament of the22
the moving picture boys22
with one end of22
connect the other post22
that it would be22
a coil of wire21
one of the most21
other terminal of the21
is connected to the21
radio boys with the21
as soon as the21
at the receiving station21
the back of the21
the door of the21
three electrode vacuum tube20
the wiring diagram in20
the a battery and20
wireless telephone transmitting set20
a vacuum tube oscillator20
be able to get20
on the part of20
post of the variable20
all cloth bound copyright20
and connect the other20
of apparatus layout for20
connect one end of20
wiring diagram in fig20
view of apparatus layout20
connect one of the20
condenser and the other20
the rover boys on20
that are set up20
the post of the20
the top of the20
bound copyright titles price20
in the opposite direction20
top view of apparatus20
have to do is20
cloth bound copyright titles20
by means of the20
two electrode vacuum tube20
the camp fire girls20
vacuum tube receiving set19
it would have been19
you are ready to19
the operation of the19
ought to be able19
we ought to be19
the filament and the19
it will be a19
a current of ampere19
if you have a19
on the other side19
a large number of19
the same as that19
sending and receiving set19
are we going to18
east rd street new18
one of the terminals18
in the way of18
a plate potential of18
in the aerial wire18
from the b battery18
positive electrode of the18
a simple vacuum tube18
in spite of the18
in the hands of18
the head of the18
rd street new york18
oscillations set up in18
the result is that18
through the primary coil18
the radio corporation of18
the resistance of a18
the variable condenser and18
a or storage battery18
this kind of a18
of the b battery18
are set up by18
of one of the18
end of the primary18
long wave receiving set18
by the incoming waves18
post of the rheostat18
boy allies with the18
in the form of18
and there was a18
in the secondary coil18
of the terminals of18
at a and b18
the rover boys in18
you have to do18
it is shown at18
is going to be18
you can use a18
lord beyond the mountains18
grid of the detector18
young aeroplane scouts in18
one side of the17
the inductance of the17
the rear of the17
street new york illustration17
of the telephone receiver17
as well as the17
in a few minutes17
once in a while17
what do you say17
the man who had17
morales and von arnheim17
is one of the17
to put up a17
a few moments later17
of the current in17
the name of the17
plate circuit of the17
wireless telegraphy and telephony17
other side of the17
a few minutes later17
connected in series with17
by the use of17
to the end of17
electrode tube acts as16
which is shown in16
post of this to16
of turns of wire16
used as a detector16
boys of columbia high16
is known as the16
turns of wire on16
a wireless telephone transmitter16
in the course of16
i tell you what16
to mile wireless telephone16
the radio boys series16
frequency transformer amplifying receiving16
the owner of the16
shown at a and16
of this to the16
the radio boys were16
a and b in16
he was able to16
plate of the condenser16
mile wireless telephone transmitter16
post of this with16
tube acts as a16
are connected with the16
the closed oscillation circuit16
with the aid of16
the primary and secondary16
with the grid of16
of which is shown16
from time to time16
transformer amplifying receiving set16
or a vacuum tube16
shown at b in16
the oscillation choke coil16
or negative electrode of16
the same way as16
electrode vacuum tube detector16
for sending set no16
connect the other end16
are you going to16
all you have to16
resistance of the circuit16
there will be a16
out of the way16
the operation of c16
the high frequency currents16
that he had been16
by the radio corporation16
the boys of columbia16
is shown at b16
at c in fig16
for receiving set no16
clip of the tuning16
to go to the16
the latter with the16
shown at c in16
and b in fig16
you can get a15
we might as well15
in charge of the15
to take care of15
so as to make15
it was evident that15
in new york city15
i want you to15
of the wireless telephone15
the vibrations of the15
the fact that he15
to the plate of15
the face of the15
from one of the15
the bottom of the15
is the same as15
the length of the15
of the detector tube15
at the bottom of15
in the middle of15
in a short time15
out of the air15
their way to the15
the tuning coil and15
was the first to15
the number of turns15
on the mexican border15
a quarter of a15
you can see that15
the stream of electrons15
it would be a15
there will be no14
to get out of14
so that you can14
brown and sharpe gauge14
radio boys at ocean14
three coil loose coupler14
of which is connected14
in the center of14
then connect the other14
on the back of14
has an output of14
of wireless telephone transmitters14
just in time to14
the secondary coil and14
alternating current power transformer14
inches in diameter and14
post of the latter14
the case of the14
the a or storage14
the members of the14
of the spark coil14
is made up of14
the hands of the14
to his feet and14
the lord beyond the14
of this to one14
and then connect the14
negative electrode of the14
cotton covered magnet wire14
current from the b14
the current from the14
the tuning coil with14
end of the coil14
for the purpose of14
the secret of the14
plate potential of volts14
transmitters with direct current14
of a number of14
is connected with the14
arc or a vacuum14
of an electric current14
the coils of the14
boys at ocean point14
you want to receive14
exactly the same as14
of the alternating current14
buck looker and his14
in the wireless room14
a radio frequency transformer14
the vacuum tube oscillator14
tuning coil with the14
on top of the14
double slide tuning coil14
the roof of the14
with a vacuum tube14
operation of vacuum tube14
the positive part of14
a day or two14
the secondary of the14
drew a long breath14
filament and the plate14
continuous wave telegraph transmitter14
in touch with the14
wire wound on a14
the loose coupled tuning14
radio boys at the13
of the fact that13
they were able to13
voltage of the grid13
vacuum tube detector and13
in a vacuum tube13
in the other direction13
out of the window13
as they are called13
boys at the sending13
it is easy to13
boys at mountain pass13
the dots and dashes13
going to be a13
in a few moments13
of the storage battery13
as a generator of13
up and down the13
made by the radio13
as soon as they13
complete sending and receiving13
for boys to years13
that it will be13
the quantity of electricity13
a great deal of13
for a few minutes13
at the receiving end13
resistance of a circuit13
radio boys at mountain13
at the foot of13
radio boys on the13
boys on the mexican13
the number of volts13
the speed of the13
right angles to each13
free end of the13
for the time being13
on one of the13
angles to each other13
the operation of wireless13
a quarter of an13
in the same direction13
to the grid circuit13
i can tell you13
the free end of13
end of this with12
of the radio station12
pieces of apparatus are12
of the oscillation transformer12
the plate of a12
of the human voice12
described in connection with12
quarter of a mile12
the two older men12
simple vacuum tube receiving12
that it can be12
pole of the b12
a twinkle in his12
primary and secondary coils12
to set up the12
we may be able12
direct current motor generator12
and the other terminal12
coil of the loose12
i was going to12
to heat the filament12
as soon as i12
of the spark gap12
all of which is12
tom swift in the12
the first post of12
connect the sliding contact12
by a current of12
ends of the secondary12
to the other post12
short distance wireless telephone12
a wiring diagram of12
that he could not12
are connected in series12
current of ampere in12
the capacitance of a12
the way in which12
this with the grid12
and one of the12
the leader of the12
acts as a detector12
at the present time12
of the filament of12
the united states and12
are connected to the12
transmitters with alternating current12
a condenser or a12
direct and alternating currents12
for the sake of12
and you are ready12
the pressure of the12
swift and his electric12
one to the other12
is shown in the12
tube is used as12
able to get a12
or zinc pole of12
with the primary coil12
in a tone of12
an alternating current transformer12
wireless telephone transmitters with12
in one of the12
to one post of12
is made to flow12
volume of this series12
at e in fig12
mile wireless telephone transmitting12
of it to the12
a loose coupled tuning12
the wall of the12
direct current from the12
a wireless telegraph transmitter12
or carbon pole of12
the condenser in the12
with direct current motor12
the radio boys had12
of the enchanted city12
the surface of the12
and the rest of12
like that of fig12
applied to the grid12
the boy allies in12
the action of the12
to keep up with12
in the presence of12
first post of the12
it must have been12
of the rheostat and12
of dots and dashes12
so that it can12
the primary coil is12
operation of wireless telephone12
from one to the12
the spark coil and12
volume complete in itself12
every volume complete in12
for the rest of12
short wave regenerative receiving12
all there is to12
plate of a vacuum12
the secret tower room12
twinkle in his eye12
connect the post of12
connect the or positive12
for heating the filament12
used with microphone transmitter12
the use of a12
but there was no12
by this time the11
the same number of11
want to tell you11
the story of the11
that he had not11
has a resistance of11
on secret service duty11
they had reached the11
would have to be11
i have told you11
of the condenser and11
i want to tell11
made it possible to11
the radio boys trailing11
for the benefit of11
out of the question11
and in a short11
you never can tell11
radio boys on secret11
boat tom swift and11
boys on secret service11
and a pair of11
the current through the11
and at the same11
the end of a11
that they had been11
on account of the11
you will see that11
have to use a11
impressed on the grid11
and the boys were11
they would have to11
seems to me that11
boys trailing a voice11
positive terminal of the11
the primary of the11
and see if we11
the positive and negative11
radio boys trailing a11
boys with the revenue11
a little while ago11
you may be sure11
at the head of11
as soon as he11
to get hold of11
it was found that11
plate of the detector11
the rest of us11
of the induction coil11
he had made a11
the course of the11
on either side of11
waves in the ether11
for this set you11
with the revenue guards11
do you mean by11
boys looked at each11
had a chance to11
the boys had been11
not far from the11
for a few seconds11
he was thinking of11
oscillations are set up11
the easiest way to11
i had no idea11
battery and connect the11
shown in the diagram11
for us to do11
boys rescue the lost10
to make the grid10
a new series of10
the mountain rest hotel10
to one terminal of10
have a capacitance of10
the second post of10
zinc pole of the10
in the telephone receiver10
tubes are connected in10
what was going on10
of the aerial wire10
the electrons in the10
by the aid of10
an audio frequency transformer10
around the a battery10
so that we can10
rescue the lost alaska10
with the outside world10
made to flow through10
plate and grid circuit10
the energy of these10
used to energize the10
in search of the10
begin by connecting the10
set up in it10
the grid circuit and10
go down to the10
current is made to10
the same as those10
when it is called10
with a crystal detector10
between the filament and10
separate heterodyne receiving set10
up by the incoming10
the bureau of standards10
can be used as10
crystal detector receiving set10
wave length you want10
the simplest type of10
for setting up the10
ship of the air10
of wire on the10
described in this chapter10
on the end of10
in the closed circuit10
with the water pipe10
end of which is10
the aerial wire and10
described in chapter iii10
had no difficulty in10
quarter of an hour10
the radio boys rescue10
the blue grass seminary10
a direct current of10
rover boys on the10
the plate current is10
a battery and connect10
vacuum tube detector is10
is shown complete at10
with one terminal of10
is used in the10
do you want to10
end of the grid10
the low voltage direct10
condenser and connect the10
the millionth part of10
of the oscillations set10
which heats the filament10
each side of the10
he came to the10
continuous wave telegraph transmitting10
operation of the vacuum10
at each other in10
of a pair of10
is used as a10
at the age of10
you will need to10
waves in the air10
in the land of10
it looks as if10
of this with one10
connect the other terminal10
the wiring diagram at10
the energy of the10
negative terminal of the10
about turns of no10
coil as shown at10
when he had finished10
capacitance of a condenser10
inventor of the wireless10
one of the end10
the foot of the10
get in touch with10
with the binding post10
foreword by jack binns10
to make sure that10
electric and magnetic units10
the same kind of10
than that of the10
which is shown at10
of a given length10
radio boys rescue the10
the lost alaska expedition10
two watt oscillator tubes10
thousandth part of a10
coil with the other10
heterodyne long wave receiving10
the flow of the10
and this is the10
connected in the aerial10
the place of the10
uniform style of binding10
we shall have to10
the molecules of air10
set up by a10
and a moment later10
the parts for a10
vacuum tube is used10
a current of electricity10
shown complete at b10
the sliding contact of10
currents that are set10
variable condenser and the10
back in his chair10
be used as a10
a volt direct current10
end of the tuning10
new york illustration the10
volt direct lighting current10
heat the filament of10
the initial source of10
the ground wire and10
the latter with one10
a to mile wireless10
in the wad sus10
on the point of10
wiring diagram of a10
the soft iron core10
the mouth of the10
can be used with10
an aerial wire system10
which is connected with10
the position of the10
the sending and receiving10
the wiring diagram fig10
sliding contact of the10
of the grid leak10
condenser or a circuit10
face to face with10
an output of watts10
and this is called10
the mystery of the10
range of wave lengths10
this part of the10
how do you know10
to wire up the10
over and over again10
the grid leak resistance10
what shall we do10
shown at e in10
hampton and don ernesto10
battery and the or10
with a look of9
was silent for a9
boy allies in the9
current from the battery9
as a detector and9
on the edge of9
to the grid of9
the rover boys at9
the rotary spark gap9
to the side of9
other parts of the9
in order to make9
he said in a9
of the current is9
it is a good9
the size of a9
far as i can9
at the rear of9
the service of the9
the boy allies under9
boy allies on the9
on the roof of9
the boy allies at9
we are going to9
i should say so9
keep in touch with9
take a look at9
the heart of the9
to the post of9
all of them are9
the identity of the9
it is sometimes called9
message that saved the9
the message that saved9
current through the tube9
that it was a9
was the work of9
the sound of the9
of some of the9
at the top of9
i thought it was9
to connect up the9
the various pieces of9
going on in the9
as though they were9
the attention of the9
the grid and the9
his way to the9
the other hand if9
the captain of the9
what do you know9
on each side of9
go back to the9
at the service of9
the history of the9
the receiver from his9
so that there is9
into the hands of9
they looked at each9
it seemed as though9
the stars and stripes9
the grid of a9
all the rest of9
that he was not9
would you like to9
the silver fox patrol9
to do was to9
the way to the9
he was about to9
the united states navy9
in a little while9
that it was not9
and in a few9
was the fact that9
so that they could9
would be able to9
the progress of the9
as if he had9
the boy scouts on9
the spark gap and9
and a length of9
the midst of a9
to find out what9
the knob of the9
to the filament and9
jumping to his feet9
with a twinkle in9
the boy scouts in9
it might be a9
how to make a9
in a state of9
the entrance to the9
at the beginning of9
a wireless receiving set9
will be able to9
the boy allies on9
are at right angles9
end of the line9
it seemed as if9
as soon as possible9
with vacuum tube detector9
various pieces of apparatus9
be connected with the9
of the incoming signal9
that saved the ship9
is due to the9
the rest of you9
as soon as you9
used in the plate9
made their way to9
you mean to say9
as he did so9
winning the ferberton prize9
can be bought for9
the form of a9
receiver from his head9
the united states government9
the operation of a9
under the influence of9
to the fact that9
it was not until9
at the mercy of9
which he had been9
the boys looked at9
boy scouts in the9
at the edge of9
flowing in a circuit8
the nature of the8
the first thing to8
to get in touch8
telegraph transmitters with alternating8
the space between the8
it must be a8
a generator of oscillations8
on the opposite side8
variometer and three variable8
to and fro in8
the free terminal of8
of the aerial switch8
wiring diagram for receiving8
the three electrode vacuum8
of a condenser or8
in a few seconds8
series by victor appleton8
a capacitance of mfd8
they ought to be8
is used as an8
for a crystal detector8
tom swift among the8
that the vacuum tube8
in the history of8
when it comes to8
in the key circuit8
to the rest of8
fail to use a8
energize the plate of8
for one of the8
by the oscillator tube8
you ought to be8
the three electrode tube8
as well as a8
and two variable condensers8
at the radio plant8
of your tuning coil8
all over the country8
to break up the8
quantity of electricity transferred8
as shown at k8
such as is used8
turns of wire and8
sending and receiving sets8
of electric and magnetic8
it was necessary to8
and it will be8
millionth part of a8
from the sending station8
it is easier to8
as shown at d8
voltage of the current8
making good in the8
if you live in8
the pulsating direct currents8
rector of little farncombe8
i miss my guess8
in the oscillation circuits8
a short time they8
tuning coil as shown8
america at rocky point8
through the closed circuit8
apparatus layout for receiving8
as they neared the8
one of the ends8
get out of here8
must be used to8
covered magnet wire on8
in wireless telegraphy and8
secondary of the tuning8
intermediate wave set with8
listen in on the8
connecting up the transmitting8
he saw that the8
coil to one of8
to do with it8
a vacuum tube in8
short wave regenerative receiver8
the positive or carbon8
a detector that uses8
primary of the tuning8
apparatus for experimental c8
discharge of a condenser8
current in your home8
a quenched spark gap8
the two electrode vacuum8
the end of which8
we ought to get8
like nothing better than8
registered in the united8
layout for sending set8
electricity transferred by a8
the frequency with which8
he led the way8
apparatus layout for sending8
diagram of long wave8
of the current that8
oscillator tubes in parallel8
coil wound on the8
of the detector and8
the tuning coil to8
the right amount of8
low voltage direct current8
coil of the transformer8
secondary coil and the8
an alternating current power8
rover boys in the8
a safety match box8
formed of a number8
posts a and b8
a telephone receiver and8
and a secondary coil8
of putnam hall or8
in accordance with the8
corporation of america at8
i told him that8
audio frequency transformer amplifying8
diagram for sending set8
different pieces of apparatus8
of the circuit is8
regenerative audio frequency amplifier8
terminal of the a8
the secondary coil is8
the united states patent8
transformer in which the8
be mounted on a8
be able to hear8
parts for transmitting set8
the radio boys in8
of your storage battery8
parts and connections of8
see a in fig8
to energize the plate8
the different pieces of8
one variometer and three8
when i was a8
of the direct current8
one post of a8
the light of the8
you must have a8
from this you will8
with the ground wire8
what are we going8
of the power transformer8
are the same as8
with the aerial wire8
way in which the8
on the grid and8
set with vacuum tube8
the vacuum tube as8
wiring diagram of long8
layout for receiving set8
as shown at e8
where two or more8
the telephone induction coil8
good in the wireless8
variable condenser and connect8
watt oscillator tubes in8
coil is wound on8
he did not know8
and the other two8
vacuum tube as a8
the air has been8
a single watt oscillator8
telephone transmitters with direct8
post of the fixed8
the voice of the8
current after it has8
detector that uses a8
until the sounds are8
over the edge of8
of columbia high on8
and negative voltages of8
the midnight call for8
a moment or two8
radio frequency transformer amplifying8
of the adventures of8
the detector tube and8
current into direct current8
voltage secondary coil which8
most of the time8
but they were not8
at rocky point near8
high frequency currents are8
into magnetic lines of8
surge to and fro8
and three variable condensers8
one watt oscillator tube8
you live in a8
or insulated copper wire8
this done connect the8
you will need a8
i have an idea8
of an oscillation circuit8
up the transmitting apparatus8
the next few days8
where you have to8
swift and his air8
the rotor of the8
a and b batteries8
he told me that8
chapman author of the8
that flows through the8
minister of the interior8
both sending and receiving8
result is that the8
that part of the8
they were in the8
the oscillations that are8
you should have a8
the form of electric8
you can get one8
a certain amount of8
at the back of8
the variable condenser to8
wave telegraph transmitting sets8
variable condenser to the8
vacuum tube used for8
the aerial with the8
as it is sometimes8
carbon pole of the8
and sustained mechanical vibrations8
what in the world8
are shown in the8
same as those described8
of the rest of8
there seemed to be8
good results with a8
of the ends of8
we ought to have8
the only thing that8
separate heterodyne long wave8
the current flowing in8
of the oscillating currents8
be able to make8
from the plate to8
up by the oscillator8
you will be able8
watt oscillator vacuum tube8
of the electric waves8
is connected with one8
united states patent office8
not in the least8
how an electric current8
moving picture boys on8
of wire wound on8
electric oscillations set up8
form of electric waves8
four watt oscillator tubes8
in this way the8
has a capacitance of8
the trade name of8
flow through the detector8
coil loose coupler tuner8
the parts and connections8
is made and works8
post of the lightning8
is a very good8
and receiving set no8
either side of the8
all of the parts8
get out of the8
with three coil loose8
you can use an8
and is used for8
how transmitting set no8
the aid of the8
if you are going8
up the sustained oscillations8
a detector in which8
the remainder of the8
of the battery current8
current whose frequency is8
length you want to8
current that flows through8
filament of a vacuum8
a separate vacuum tube8
of a simple vacuum8
of a wireless telegraph8
to a distance of8
he made his way8
the last of the8
the output of the8
and it was a8
all over the world8
the capacitance of the8
experimental continuous wave telegraph8
out the pulsating direct8
a tuning fork is8
swift and his motor8
transmitting sets with direct8
this can be done8
the plate to the8
free terminal of the8
by allen chapman author8
are connected in parallel8
midnight call for assistance8
of the loose coupler8
positive and negative voltages8
on the side of8
the floor of the8
by connecting the leading8
the radio frequency currents8
how receiving set no8
wave regenerative receiving set8
is also called a8
you have a volt8
to look after the8
it as shown at8
of a telegraph key8
and shook his head8
of the fixed condenser8
copper wire wound on8
efficient regenerative receiving set8
come out of the8
with the other post8
the other way around8
of the circuit in8
allen chapman author of8
not be able to8
damped and sustained mechanical8
as soon as we8
in an effort to8
as good results with8
a hot wire ammeter8
one end of a8
large number of turns8
megohm grid leak resistance8
columbia high on the8
parts for a crystal8
for transmitting set no8
as much as possible8
of the latter to8
surge through the closed8
you ought to know8
do you mean to8
coil of wire wound8
in time to see8
made like the aerial8
the current in amperes8
how to put up8
can be connected in8
magnet wire on a8
receiving set with vacuum8
current in the coil8
some of them are8
of one of them8
it had not been8
jack shook his head8
the presence of the8
owned by the radio8
tube can be used8
to get back to8
plate to the filament8
a storage battery is8
and out of the8
of the lightning switch8
the only way to8
to tell you how8
and by the time8
as we have seen8
electrons away from the8
as far as the8
telegraph transmitting sets with8
that leads to the8
there was to be8
it is a very8
of the wireless telegraph8
that he had a8
was going to be8
one vacuum tube detector8
the superintendent of documents8
described under the caption8
now connect one end8
of electricity transferred by8
a transformer in which8
surge in a circuit8
the far end of8
that they will be8
the energy of an8
in the maine woods8
flow back through the8
posts of the variable8
send out continuous waves8
end of the aerial8
other terminal of this8
condenser as shown at8
boys with the forest8
or dry cell battery8
diagram for receiving set8
high frequency currents surge8
which is connected to8
transferred by a current8
with the forest rangers8
on the grid of8
wave lengths up to8
as in the case8
is impressed on the8
is the unit of8
coil of the oscillation8
thrown off by the8
the number of electrons8
the negative terminal of8
you can buy a8
sent out by the8
of the grid condenser8
single watt oscillator tube8
oscillations that are set8
be heard in the8
to send a message8
to the or positive8
silent for a moment8
easy to see that8
that he did not8
wave regenerative receiving sets8
connect a fixed condenser8
a vacuum tube used8
it looks to me8
is placed in the8
of america at rocky8
the rheostat and the8
a lot of fun8
it was decided that7
thing for us to7
the events of the7
and the resistance of7
and the radio boys7
is to put up7
proved to be a7
we are in the7
of the standard cell7
it looks as though7
then you will have7
between them and the7
to try to get7
could not have been7
transmitting and receiving sets7
do you know what7
they made their way7
have a frequency of7
the influence of the7
a flag of truce7
feel the same way7
i do not believe7
there was nothing to7
rose to his feet7
the positive terminal of7
and there is no7
for the reason that7
of the same size7
it had been a7
the other radio boys7
the circuit in which7
tube as a detector7
is a stream of7
and the way they7
was out of the7
there had been a7
that all of the7
which i have just7
you can count on7
the capacity of the7
the plate and grid7
the ears of the7
and see what we7
do you know about7
it ought to be7
the key to the7
when the grid is7
current in the antenna7
as long as it7
on the th of7
the aid of his7
it can be done7
you will find that7
in the head phones7
at a distance of7
what do you suppose7
of one hundred and7
a high frequency current7
to the conclusion that7
to the other side7
about a quarter of7
it would be just7
side of the ship7
see what you can7
the entrance of the7
in a series of7
first thing to do7
you going to do7
we going to do7
it is connected to7
a long way from7
we say that the7
it seems to be7
the tube and the7
with a loop aerial7
i thought you were7
the wave length of7
the location of the7
just as well as7
and was about to7
american telephone and telegraph7
he had not been7
circuit of the audion7
author of the famous7
the construction of the7
the same amount of7
that they would be7
ought to have a7
all parts of the7
in a receiving set7
to give it to7
alternating current in the7
the fact that they7
it was only a7
some of the electrons7
is exactly the same7
one of the big7
development of the telegraph7
with a piece of7
to one side of7
of a group of7
nothing of the kind7
make the grid positive7
it was easy to7
the interior of the7
for the radio boys7
he seems to have7
the rest of it7
the potential of the7
the size of the7
of the coil of7
would be all right7
author of the radio7
the outside of the7
think we ought to7
go over to the7
it is called a7
what has become of7
by the time the7
the discharge of a7
in wire to the7
the american telephone and7
to know how to7
voltage on the grid7
the eyes of the7
for a time he7
get the best results7
the scene of the7
swift and his great7
the grid circuit as7
and bob and frank7
the windows of the7
in the field of7
in the next few7
so much the better7
as though he had7
the first of the7
for a little while7
which the boys had7
of the morse code7
back and forth in7
is tuned to the7
from new york city7
you want to go7
the opposite side of7
and we ought to7
the other two boys7
in the nick of7
the filament to the7
the other end to7
he knew that the7
this is known as7
that they were not7
when at last he7
on the track of7
solving a wireless mystery7
there is only one7
to be in the7
on the lookout for7
as a means of7
with an air of7
the sensitivity of the7
to the left of7
in which he was7
used in connection with7
his way back to7
got a hunch that7
on their way to7
be able to see7
of the man who7
there are several ways7
united states of america7
see if we can7
nothing better than to7
what are you going7
in the air and7
at the prospect of7
the search for the7
at the same moment7
of electrons in the7
at once to the7
it is to be7
as though it were7
to flow through a7
an alternating current is7
was no sign of7
telephone and telegraph company7
in the morning and7
and it would be7
the soldiers of the7
hampton shook his head7
to the other of7
i would like to7
you know what the7
one or the other7
made it possible for7
a wire to the7
there was no sign7
if you can get7
mean to say that7
to know something about7
what to make of7
current flowing through a7
the united states of7
as well as i7
a lot of trouble7
it is necessary to7
are impressed on the7
of an alternating current7
of the secondary of7
so that they will7
way back to the7
the coil of wire7
the faces of the7
steps at a time7
if we want to7
moorish minister of the7
had to do was7
one of the men7
an arm over his7
in constant touch with7
of the same frequency7
was to be the7
one of the three7
to be on the7
in the matter of7
to the radio boys7
as one of the7
after it has been7
in a low tone7
when they reached the7
it go at that7
there is to it7
you were going to7
just as fast as7
as you will see7
we can make it7
of the palace guard7
jumped to his feet7
series with the primary7
he was in a7
that would have been7
of the head phones7
send a message to7
what do you make7
that he was a7
appeared to be a7
vacuum tube can be7
are connected with a7
the fall of the7
early in the morning7
set you will need7
from that of the7
as he turned to7
to get the best7
get back to the7
stream of electrons from7
members of the council7
as far as i7
how in the world7
an idea of the7
to tell you the7
to get as good7
fact that he was7
got to do is7
the plate circuit is7
sprang to his feet7
the nick of time7
but it is not7
nothing to do but7
a few moments he7
don ernesto and mr7
an alternating current in7
if we can only7
for all of us7
in the primary circuit7
in the plate current7
to live up to7
seems to be a7
what appeared to be7
up in the air7
about the size of7
in the last letter7
the filament of a7
as long as the7
there was a general7
a resistance of ohms7
at a loss to7
by the time they7
in the hope of7
the whereabouts of the7
the beginning of the7
when they are in7
acts as an amplifier7
looks to me as7
get out of this7
as though he were7
on one end of7
bob and his friends7
frequency of the current7
the other parts of7
to the attention of7
there seems to be7
the moorish minister of7
at the sound of7
terminal of the battery7
and a number of7
at the base of6
to the hotel and6
condenser connected in the6
of which is a6
a single oscillator tube6
with the plate of6
was not to be6
has a diameter of6
that the boys had6
connect it to the6
and some of the6
end of the latter6
the ranger boys and6
electromotive force and the6
aerial wire system you6
as the grid becomes6
contact of the primary6
as if it were6
of the two electrode6
to tell you that6
to use a lightning6
for a complete sending6
a receiving set for6
shown at k in6
form a conducting path6
secret service duty the6
battery current through the6
aerial that can be6
i might as well6
for stepping up the6
radiator or water pipe6
just the same as6
came to a halt6
the plate and the6
was too much for6
this coil with the6
the grid circuit of6
buck and his cronies6
in the radio boys6
and the other a6
by an amplifier tube6
in your home you6
he was unable to6
of turns of copper6
this you can do6
the engineers of the6
hundred and fifty miles6
in the receiving circuits6
connect the ends of6
b battery and the6
transformer and the other6
in sending and receiving6
is the quantity of6
frequency transformer and the6
to the other terminal6
i agree with you6
revenue guards the radio6
at a brisk pace6
at this time of6
of a primary coil6
connect one post of6
their way through the6
condenser and then connect6
the front of the6
a variable condenser connected6
the passage of the6
in this type of6
them at right angles6
one of these was6
the boys were so6
current flows through a6
his eyes on the6
commercial alternating current into6
should be able to6
and inches in diameter6
coil or a transformer6
one megohm grid leak6
in the motor boat6
diagram at a in6
heard in the headphones6
which the air has6
set to work to6
carl lutz and terry6
a variable condenser of6
camp fire girls at6
we are ready to6
one tuning coil as6
the watt tube transmitter6
all of the connections6
have a chance to6
the possibilities of the6
a few minutes the6
positive part of the6
to make a ground6
distance wireless telephone transmitting6
if the frequency is6
it to the wire6
rocky point near port6
when the radio boys6
of the aerial with6
current to heat the6
gauge cotton covered magnet6
those described in chapter6
of course there are6
to do this you6
i want to see6
waves of a given6
of watts and develops6
of the telephone art6
across the atlantic ocean6
includes the secondary coil6
is expressed by the6
vacuum tube acts as6
how are we going6
to be wondered at6
coil and the other6
i do not know6
tube and the headphones6
that the terminals of6
will carry a current6
wireless headphone is made6
limits the flow of6
at i in fig6
for complete sending and6
was going to do6
the parts are connected6
very small amount of6
shown at i in6
one volt storage battery6
filter reactor for smoothing6
this done connect one6
sets described in the6
wire of the aerial6
to megohm grid leak6
the operator at the6
they were on the6
one at a time6
a very short time6
are thrown off by6
end of the tickler6
in possession of the6
putnam hall or the6
the way he had6
a rotary spark gap6
voice from the void6
latter with one post6
that there is a6
leaned back in his6
the greatest amount of6
the same principle as6
thing to do is6
a single wire aerial6
you may be able6
other hand if the6
wireless telegraph and telephone6
other post to the6
as if he were6
the same as for6
the path of the6
into the mysteries of6
the filter reactance coil6
the part played by6
the radio boys and6
hundreds of thousands of6
to the top of6
to the ends of6
air has been exhausted6
transmission will be in6
cannot be used for6
the value of the6
little more than a6
is connected to a6
for connecting up the6
a very small amount6
blue grass seminary girls6
tuning coil you can6
copper or aluminum wire6
in the near future6
and the energy of6
through the coils of6
as the radio boys6
that was to be6
is used to energize6
output of watts and6
the transmitter can be6
binding posts of the6
treasure the radio boys6
the two electrode tube6
of the tickler coil6
give it to him6
is being sent out6
of the primary of6
is shown at d6
need for this set6
or positive terminal of6
in time to hear6
of the first amplifier6
he was trying to6
these surge through the6
a crystal detector receiving6
as long as they6
as i told you6
for one or two6
current flowing from the6
a current of amperes6
one aerial condenser as6
a crystal detector is6
it is only necessary6
of the new york6
to the place where6
impressed on the oscillations6
the latter to the6
i wish i could6
the vacuum tube rectifier6
one end of aerial6
the construction of a6
appleton uniform style of6
as much as i6
in the next room6
the positive half of6
an island in the6
in its simplest form6
is formed by a6
the current is flowing6
makes contact with the6
and which sends out6
time they had reached6
know what it is6
anything to do with6
to flow back through6
to me as though6
i shall tell you6
you do not need6
through the holes in6
or storage battery with6
the separate heterodyne receiving6
would have been a6
any part of the6
coil which develops volts6
transformer is shown at6
the binding posts of6
it is expressed by6
the tuning coil that6
of the apparatus for6
a number of turns6
of the a or6
turns of copper wire6
we can find the6
uses a crystal of6
to the wave length6
what are you doing6
changed into magnetic lines6
tell us about it6
there would be no6
is connected in the6
the difference between the6
as the initial source6
they were going to6
of this kind is6
duty the radio boys6
two coils of wire6
western union telegraph company6
it was on the6
at one of the6
by the positive part6
the old brownell place6
the first amplifier tube6
vacuum tube telegraph transmitter6
the detector and the6
with the wire that6
it was decided to6
have a look at6
was at that moment6
on the aerial wire6
a detector of electric6
he would not be6
post b to the6
in a telephone receiver6
to the electrode of6
for the production of6
ralph of the roundhouse6
electrons are separated from6
audio frequency transformer and6
off by the filament6
but it was a6
it was a long6
ralph on the army6
of the energy of6
a mile from the6
to the calomares ranch6
the turns of wire6
put in an appearance6
is wound on the6
you can use either6
one that has a6
owner of the catwhisker6
by the secondary coil6
of the two men6
you can make the6
that goes to the6
detector receiving set with6
same way as the6
which includes the secondary6
manhattan electrical supply co6
took charge of the6
shunt the grid leak6
the lightning switch and6
of the connections are6
in which the current6
of a couple of6
current into pulsating direct6
the holes in the6
marjorie dean high school6
of a variometer or6
a telephone induction coil6
when a current is6
by this time they6
was easy to see6
side of the house6
constants of an oscillation6
coil on the left6
which connects with the6
a range of wave6
head phones and the6
a few minutes before6
secondary coil is wound6
volt dry cell battery6
on the army train6
of exactly the same6
as you can see6
the volt direct current6
the end of this6
this to one end6
of an induction coil6
of which it is6
with attractive cover designs6
as they reached the6
wiring diagram at b6
for girls to years6
of a tuning coil6
of a crystal detector6
inventor of the telephone6
to tell the truth6
the base of the6
let it go at6
stand a plate potential6
of water flowing in6
in wire of the6
tube for setting up6
of bob and joe6
he said at last6
make their way to6
the mercy of the6
which they had been6
connected with a battery6
terminals of the secondary6
the high voltage secondary6
do you think of6
post of the switch6
makes it possible to6
is ready for use6
a current is made6
expressed by the symbol6
mexican border the radio6
where you are going6
used for all general6
all of which are6
to make and break6
high voltage direct current6
have been in a6
are ready to tune6
flows through the primary6
could not help laughing6
and listen in on6
out of the house6
one described in connection6
with an alternating current6
stories for boys of6
current in the primary6
from stem to stern6
put it up to6
water flowing in a6
to be at the6
in a day or6
in order to get6
from the lord beyond6
in the power circuit6
and connect the sliding6
you must use a6
the degree to which6
boy allies under the6
of the three boys6
an arc or a6
air gap lightning arrester6
a two electrode vacuum6
the high tension condenser6
consists of a primary6
if there is a6
of your receiving set6
is fixed to the6
by one of the6
do you think you6
for the mile transmitter6
a vacuum tube is6
that he was going6
a week or so6
with the tuning coil6
a condenser connected in6
regenerative action of the6
of the western union6
go up to the6
the other post to6
each of these is6
as shown at i6
the vacuum tube amplifier6
of the american telephone6
consists of a pair6
with the result that6
couple of layers of6
is shown at e6
much the same way6
for a few days6
a wire from the6
and this you can6
and made his way6
in an open circuit6
of this coil with6
fork so that it6
you will see from6
it is called an6
border the radio boys6
can be done by6
positive particles of electricity6
so far as i6
and the clip of6
ready to tune the6
grid leak as shown6
i suppose we might6
half an hour later6
the greater will be6
distances up to miles6
of apparatus are connected6
fixed and variable condensers6
the water pipe or6
transmitting set you need6
the revenue guards the6
and to do this6
the aerial wire is6
came in sight of6
it could be seen6
high in the air6
the radiator or water6
leaped to his feet6
of the filament with6
will flow through the6
had a number of6
there is a chance6
an electric current is6
the result was that6
the battery current through6
it was not long6
i only wish we6
do you think we6
the heat of the6
fine insulated copper wire6
watt vacuum tube oscillator6
described in the foregoing6
that it was only6
a few days ago6
volt direct current is6
used as a generator6
what is going on6
is made like the6
the apparatus and connections6
this time they had6
there was not a6
audion as an amplifier6
moving picture boys in6
a battery and the6
stream of electrons is6
of the plate circuit6
you know what i6
coil of the tuning6
i guess we can6
it is a little6
with a pair of6
enough to be heard6
will be glad to6
the wave form of6
is heated to brilliancy6
the western union telegraph6
grid of a vacuum6
in the secondary circuit6
the or carbon pole6
for all general public6
could not be seen6
a six step amplifier6
one or two watt6
coil with the ground6
of the rheostat with6
the last few days6
of the grid of6
series of copyright titles6
reactor for smoothing out6
modulating the oscillations set6
close at his heels6
the intensity of the6
are exactly the same6
get as good results6
damped and sustained electric6
over a range of6
which are set up6
got in touch with6
circuit which includes the6
a length of wire6
like the one described6
a loop of wire6
pieces of apparatus for6
made his way back6
or more amplifying tubes6
in one of those6
as to make the6
as far as that6
positive or carbon pole6
you want to know6
of the filament to6
i have a hunch6
up a magnetic field6
was thinking of the6
a crystal detector or6
plate of the oscillator6
a fixed condenser of6
the electrodes of a6
carry a current of6
out as shown at6
pieces of apparatus you6
audio frequency amplifier receiving6
got to do with6
where he had been6
we have to do6
there are many different6
the principle of the6
oscillator tubes with sockets6
the current of the6
a look at the6
it is made to6
how the two electrode6
the boy troopers on6
tube as shown at6
in which the vacuum6
definitions of electric and6
spark coil and the6
primary coil wound on6
you want to use6
to flow through the6
the life of the6
filament of the vacuum6
rheostat as shown at6
by a spark gap6
they found that the6
circuit of the tube6
the operation of vacuum6
that has a capacitance6
the filament storage battery6
aerial condenser as shown6
on the previous day6
can be set up6
the or positive terminal6
so that the oscillations6
the head phones and6
used for changing commercial6
filament and the other6
wire to one of6
edge of the clearing6
to the aerial and6
of copper wire wound6
might be able to6
appeared on the scene6
same pair of wires6
electrode of the storage6
lighting current in your6
by the fact that6
a source of direct6
are immersed in oil6
for the telegraph key6
the higher the frequency6
the sending station or6
the flow of water6
wave form of the6
make and break the6
all i can say6
telegraph transmitters with direct6
secondary coil which develops6
a soft iron core6
three electrode tube acts6
got to hand it6
that means that the6
inductance of a coil6
to find out the6
the middle post of6
this you will see6
frequency currents that are6
as described in chapter6
a step or two6
post of the condenser6
and the or positive6
the dry cell and6
tuning coil on the6
expect to get as6
between it and the6
or you can use6
one grid leak as6
part of the country6
the b battery and6
are in the same6
point near port jefferson6
hundreds of miles away6
tell you the truth6
as those described in6
potentiometer around the a6
he had been a6
two variometers and two6
produced by the incoming6
in the heart of6
service duty the radio6
electric oscillations that are6
to the radio station6
and connect it to6
one of the forks6
part of the coil6
the tuning coil is6
you strike one of6
binding posts a and6
it is shown in6
a resistance of ohm6
of the choke coil6
are told in the6
up to us to6
the alternating current transformer6
the electron stream in6
the only difference between6
in a line with6
was the son of6
the man at the6
vacuum tube for setting6
of apparatus for this6
of the air and6
how the three electrode6
twist the ends of6
variometers and two variable6
a bell telephone receiver6
opposite side of the6
the shelter of the6
up in the circuits6
to flow through it6
you will have a6
boys of all ages6
the telegraph and the6
lines of force and6
source of alternating current6
on the oscillations that6
in the city and6
after they had gone6
and this in turn6
wiring diagram for complete6
dean high school series6
found themselves in the6
there was no time6
kinds of wireless systems6
rose from his chair6
made his way to6
such as described in6
described and pictured in6
but at the same6
posts of the spark6
the electrode of the6
if you do not6
the officers and crew6
the direction from which6
or other good compact6
the aerial and the6
of the amplifier tube6
the rate of about6
see what we can6
what you can do6
one rheostat as shown6
in the secret tower6
series with the aerial6
to hand it to6
as long as we6
you might as well6
the boys in the6
the father of the6
know what to make6
you and your friends6
by the time he6
in sight of the6
the coming of the6
high potential alternating current6
the rate of one6
a complete sending and6
the grid will be6
a sheet of copper6
one hundred and fifty6
leak as shown at6
the wonders of the6
the circuit is in6
ground wire and the6
after they had been6
the passage of a6
setting up sustained oscillations6
of the detector filament6
think it would be6
of vacuum tube transmitters6
terminals of the filament6
latter with the other6
let me tell you6
of the oscillator tube6
wire on a spool6
and sustained electric oscillations6
i want to get6
the inductance of a6
current without connecting in6
when he spoke of6
don sturdy in the6
if you wish to6
and you want to6
is sometimes called a6
diagram for complete sending6
spark gap to the6
new series of copyright6
of rectifier vacuum tubes6
and the tuning coil6
had no intention of6
and the inductance of6
lost no time in6
which develops volts are6
right angles to the6
coils of the telephone6
see appendix for definition6
under the caption of6
the ends of a6
with the exception of6
the development of the6
which the current is6
your receiving set and6
tube as a modulator6
without the use of6
i tell you that6
in the preceding chapter6
in the coil cd6
caught sight of the6
through the detector tube6
of the loose coupled6
wave of his hand6
by means of an6
to their feet and6
at the radio station6
lutz and terry mooney6
for this transmitting set6
part of a henry6
and it was not6
rotor of the variocoupler6
he said with a6
oscillations in which the6
same as for the6
he could not see6
wait till i get6
in spite of his6
two loops of wire6
connect the free end6
current flowing in the6
send out waves of6
to a point where6
the current that flows6
the man in the6
receiving set with a6
a peach of a6
for a full moment6
the outdoor chums on6
closed magnetic lines of6
in the second place6
end of the condenser6
the higher the resistance6
a couple of layers6
same as that used6
used as a modulator6
if the grid is6
greater will be the6
circuit in which the6
nothing more than a6
the positive plate of6
wire wound on an6
telegraph and telephone messages6
out of the water6
when you come to6
rheostat and the other6
are said to be6
have a volt direct6
the other of the6
varied by means of6
bell telephone receiver is6
connect the first post6
a pair of head6
for setting up oscillations6
posts of the condenser6
to see what was6
to the ground wire6
to be found in6
as a sort of6
potential of the plate6
the secondary coil in6
there are two general6
be back in a6
at the far end6
sets up sustained oscillations6
by the light of6
that it is a6
up in the oscillation6
parts and these are6
on the contrary he6
get away from the6
connect clip of the6
he was on the6
the point of the6
watt oscillator tubes with6
the same sort of6
they could see the6
victor appleton uniform style6
come to an end6