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Download "FM радио усилитель + фикс регулятора громкости"

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ремонт
своими руками
радиотехника
спаяй сам
советские радиодетали
кт3102
кт316
кт315
пайка
канифоль
олово
ностальгия 90-е
приемник плохо ловит FM
как улучшить прием
как сделать громкость
нерегулируется звук
нет сигнала
очень тихо
с помехами
как собрать усилитель самому
как паять
как сделать плату
как наматывать катушки
усилительсигнала
универсальный
сделатьсамому
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  • ruRussian
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00:00:00
Hello everyone, max power and today
00:00:02
we are repairing the radio receiver and also
00:00:04
improving its signal reception, the essence is
00:00:06
this, this is my neighbor’s receiver,
00:00:09
he lives as a woman
00:00:10
in the village and he asked my grandfather to
00:00:13
tell me to make a better radio receiver,
00:00:16
he has very bad reception of it 1 and
00:00:19
here the whale also has problems with the volume when
00:00:21
turning, the sound is bad,
00:00:23
we will now fix the volume control and
00:00:25
also make an antenna for the plants, an antenna,
00:00:28
even a good amplifier because
00:00:30
the antenna will be here the same, but it
00:00:32
will be amplified several times
00:00:34
better to redo the circuit a little and
00:00:36
made an amplification module, let's say so
00:00:38
let's see what works with the
00:00:43
[music] receiver,
00:00:46
but the volume aggregator is
00:00:49
already unusable, okay, there are even
00:00:51
cassettes,
00:00:52
look how they are made, and even
00:00:54
someone has a laser of some kind
00:00:55
for 3 ranges, work on it once the
00:00:58
batteries are powered by four and a
00:01:02
half volts internally, even
00:01:04
Marika Chu has batteries and it
00:01:07
really works on them, it’s cool from the tone, most
00:01:12
likely the module itself works on three,
00:01:13
let’s take it apart and see what’s inside, in
00:01:17
principle it’s a good model when large
00:01:19
batteries last for a long time, you know,
00:01:23
these are more in radio reception mode so that it will be able to
00:01:26
provide good reliable reception
00:01:28
great, that’s actually all the
00:01:30
filling,
00:01:31
so here we have power from a 220 volt
00:01:34
500 milliampere network, for example, a transformer
00:01:36
and it’s even written here the main board with airborne
00:01:41
radio antenna tuner
00:01:43
microcircuit coils for f em reception here
00:01:47
we have a variable capacitor
00:01:49
that’s actually responsible for the school
00:01:53
and here We have,
00:01:57
yes, usually there is sound, because it’s a
00:01:59
non-pony thing,
00:02:02
I hate these and flat variable resistors
00:02:04
they constantly break because of something that is
00:02:06
only known to them, while the purely
00:02:10
Chinese floor is mounted somewhere, that is, it’s
00:02:13
even rigidly made, but what can you do
00:02:16
about it or Receivers for such
00:02:18
people, millions of saffron milk caps, are stamped like
00:02:21
nothing will work if you finish them with
00:02:22
a file, it will be generally excellent.
00:02:25
We have an antenna connected to the beam, but here
00:02:27
personally there and the idiot is very strange with this,
00:02:30
they soldered the antenna somewhere incomprehensibly directly
00:02:33
onto the resistor, the details are present
00:02:38
and always here in general half of them are not
00:02:41
here, there must be some kind of amplifier here, there must be one, there is
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no
00:02:44
China, there is China, everything is very fragile, very
00:02:48
small, this is the backlight, by the way, we have the
00:02:49
backlight of the division, I want to touch this
00:02:55
circuit because it can fall apart
00:02:57
into a vessel, another one, I quickly smoked it
00:03:00
on the Internet and immediately I came across a
00:03:01
very good site called radius code
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and there they discuss and lay out
00:03:07
cool circuits and one of the questions
00:03:09
will already be answered in 2013,
00:03:12
maestro, thanks to him, a user with this
00:03:15
nickname, he already has such an amplifier circuit
00:03:17
on one transistor when 38,
00:03:19
while using two coils
00:03:21
a little capacitors, a few resistors,
00:03:23
you get a similar circuit which
00:03:26
remains, for example, in a car amplifier, that
00:03:29
is, car radios stand attacking a module
00:03:30
to amplify the antenna, and this helps very well
00:03:32
here, describing approximately the principle of
00:03:34
its operation,
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but its essence is that it has
00:03:37
good gain for such a size 18
00:03:39
itself, the gain is achieved this is because
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here there are two filters, the first filter is from
00:03:44
up to 6 megahertz and lowers the pure cubes,
00:03:48
they pass the frequency, and the other is above 120, this is to
00:03:50
massage exactly what we need, from
00:03:52
this it turns out more accurately, the amplification is
00:03:54
needed, but the circuit is simple, it is usually an
00:03:56
amplifier based on an npn transistor
00:03:58
structure, here Now we will
00:04:00
solder this one and we will put it in the gap from here we
00:04:02
put the antenna at the input from the sweat at 50,
00:04:05
we will solder it off with posts here
00:04:07
and here we will solder the output from the amplifier
00:04:10
directly to where the water was,
00:04:11
where the antenna was,
00:04:12
this device is powered by 9-12 volts, but
00:04:16
there is a variant of it I think it should be powered at a lower
00:04:19
voltage; for this, the
00:04:22
value of this resistor, which
00:04:24
is on the base, is usually reduced; if we
00:04:27
halve your voltage, you can reduce it, and
00:04:29
I also think
00:04:30
we’ll try to solder such a unit twice, now
00:04:32
I’ll look for capacitors, all 220
00:04:34
microfarads of emergency farad, two pieces
00:04:36
and two peak farads, after all, we will create
00:04:39
picofarads and 2727
00:04:40
I think we can find it to make a
00:04:43
filter for the main problem, then we
00:04:44
can make a filter without them, the population will already be
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with this, it will be just what is needed in the
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unit and very far away to receive signals
00:04:51
well
00:04:53
double let’s immediately make a variable
00:04:56
resistor what's the deal with everyone, a variable
00:04:59
resistor volume control, essentially this is a
00:05:01
very simple part and there are 3 contacts
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one year act mass another contact is the
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input of the amplifier
00:05:07
and the third contact is the output from the radio i.e.
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look here there is a signal, so
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the contact is blue and green contact 2 is the
00:05:14
input of the amplifier, that is, the green contact
00:05:16
floats from top to here and down to here,
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what can be as close as possible
00:05:21
to the move here will be the maximum
00:05:23
volume, and if we twist it here, then he will
00:05:25
go minus the volume is less less and
00:05:27
added goes that is,
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the potential between these two points is removed here,
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so I’m looking for a variable resistor, they
00:05:34
were called potentiometers,
00:05:36
you can replace it with the same variable resistors,
00:05:37
they all come in different shapes, sizes, but the
00:05:39
essence is the same for all of them, 10 4 7 to 47
00:05:43
kilo-ohms usually be audio amplifiers cost
00:05:45
47 kilo-ohms replaced something like this, for example,
00:05:55
this would be suitable
00:05:56
sp3 4k 747 kiama
00:06:00
to the house will be more than enough, well, they
00:06:03
almost match a little, as
00:06:05
always, you will need to work with a file on the pieces,
00:06:07
we’ll also remove it if it comes off and everything doesn’t
00:06:11
fall apart completely and you need to glue it
00:06:13
here there will be at least those, but here you
00:06:16
don’t even need to glue anything, Soviet Chinese
00:06:18
technology, it’s as if they were created at the same
00:06:20
time in the same factories, so it
00:06:22
fits perfectly, so music centers like
00:06:24
these rule and again now you just
00:06:27
need to fix everything more beautifully to the end of the
00:06:31
house in general, of course you you can
00:06:33
try to clean them with alcohol, this
00:06:35
thing of removing a drop of alcohol there, but it doesn’t
00:06:37
always work out that way and in short, and
00:06:39
replacing it for a long time is not enough, this
00:06:43
Chinese scream is everywhere, I remember these
00:06:46
for the sake of a sign in Kazakhstan, I spent all my
00:06:47
childhood in the dachas, they were crazy and it was
00:06:52
cool to listen back then, it was still
00:06:54
Europe, plus all the hits were shown yet,
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I won’t be the same
00:06:58
about copyright as now and often 1 pop
00:07:01
game it was then really interesting and the wills and the
00:07:03
music are cool, you can hear the hits of
00:07:05
the nineties while listening to the Lego block, but it was
00:07:10
sent here, so we’ll put it exactly
00:07:13
also, just like that, it matches perfectly for a long time,
00:07:15
practically the rest, you can, as always,
00:07:17
you know, use glue to play around with the curve from the
00:07:25
era, it sticks to it, so now it soldered
00:07:30
our recruiter volumes, by the way, how much does it cost to
00:07:35
roll the film, the member reminds me of repairing
00:07:37
consoles, including dandies, the same ones
00:07:39
lived until it was made, it’s unclear
00:07:42
which ones the snot is the same, these
00:07:45
solderings are mounted mounting, no any
00:07:50
strictness, not only they are remade right at the
00:07:52
factory, these fruits are so
00:07:55
thin, they can break in your hands right now,
00:07:57
you need to fill them with a glue gun and then
00:08:13
everything is very fine, by the way, the resistor is
00:08:16
very old, but still less, it works well
00:08:19
[music]
00:08:30
but I just don’t want to lift it all
00:08:32
cleanly, it can go wrong in our hands,
00:08:34
you can see for yourself how it’s done, just
00:08:37
like I’ll do it for you with electrical tape
00:08:39
and hot-melt adhesive, also the Chinese have another 90 diodes,
00:08:43
well, even parity is the work written the house
00:08:47
will stand to listen to him, why
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not the most important thing of the Chinese, one thing is
00:08:52
the cost in this situation and the cost
00:08:55
turns out to be a pittance, so they are in
00:08:57
every house
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so that it stays better, they put up pieces of paper,
00:09:00
friends are brilliant, dudes, you
00:09:04
need to put up pieces of paper too more often,
00:09:07
here it is and it still costs as much as it should
00:09:10
I love this quality of these Sonys, so
00:09:13
you open the equipment and there is a piece of paper
00:09:15
placed there, what’s better is that it’s a pity the button,
00:09:19
oh well, everything in the mountain with the repairs is
00:09:22
finished, we already have another one left, we are
00:09:24
absolutely now interested in modifications,
00:09:27
depending on the type of antenna rupture, we will install
00:09:31
our wall, there will be a sphere diagram
00:09:34
high-frequency
00:09:35
amplifier now I will look for all the details,
00:09:37
select the nominal value, check all this with a
00:09:39
multimeter for
00:09:41
operability and I will show you the
00:09:42
final result practically,
00:09:44
but I will also show you how to make a lazy
00:09:45
circuit, the so-called one, using pieces of PCB
00:09:48
or hanging mounting, it can even be done,
00:09:50
let's go, we assemble from what we have all
00:09:53
that she is waiting for menu points
00:09:55
scatter of details can be plus or minus usually 5
00:09:58
there is even 25 percent on the tap boring
00:10:00
example of a capacitor
00:10:01
to our surprise almost all
00:10:03
the details they even match the legs at
00:10:05
face value it’s true u10 capacitors
00:10:07
had to be found only these
00:10:09
Chinese 27 picofarads because it says 27
00:10:11
And . on top and with black paint you are here this
00:10:13
designation is picofarad and so everything
00:10:16
is practically 2727 51 51 47 picofarad
00:10:22
I just found one like this there
00:10:24
will be a slight variation in the purity of
00:10:27
deathwing the most important thing of course is how you
00:10:28
wind it and those same coils with you
00:10:31
we will deal with the coils then there are no problems this
00:10:34
just a wire on a mandrel there is 4
00:10:36
millimeters by 5 millimeters, you can use it
00:10:38
depending on the formula of a special
00:10:40
calculation program, we need a coil
00:10:43
to be at 60 megahertz and the other at
00:10:46
120 megahertz and that’s all we need now, we’ll
00:10:50
figure it out, ran a friend there is no such
00:10:52
transistor that 68 a bunch like 315 of them
00:10:55
You can also use them as a last resort,
00:10:57
but they have a
00:10:58
very low gain, I have such a board, it’s a
00:11:01
pre-amplifier from Babin’s
00:11:02
tape recorder, and it’s very old in its
00:11:06
legs, and the most important thing is that these are the
00:11:07
transistors with the white designation in
00:11:09
this KT3102, as far as I remember, and with white
00:11:12
. face down they have the highest
00:11:14
gain, that is, if they are installed, this
00:11:17
will still be a more or less normal replacement,
00:11:18
unlike in 315, now we will unsolder them
00:11:21
and check some that 40 cent
00:11:29
gain is excellent npn structure, everything is as
00:11:32
it should be, you can see right away 1 2 3 1
00:11:35
we have 2 emitters, we have a base of 3 collectors,
00:11:38
so if only it turns out that the tact has everything
00:11:41
soldered perfectly, the basin is there, well, the
00:11:47
caste also concerns the coils, here you need a
00:11:49
special wire 04
00:11:51
as an amendment of 4 millimeters, but as a signal
00:11:54
this is all in theory, in practice this is not
00:11:57
found at I have two coils like that of the
00:11:59
power supply, but there are very thick
00:12:01
wires, it will be too thick, it will be
00:12:04
larger, it’s almost a millimeter,
00:12:05
and if this one is thinner, then part 3, that
00:12:10
is, it’s not so wrong, but it’s better to take less
00:12:12
and it’s not scary,
00:12:13
you can compensate with others,
00:12:16
for example what we wind on will be a
00:12:19
precision instrument, not to increase the
00:12:22
cost of such that the diameter will be measured,
00:12:24
but there is a drill, a drill is perfect
00:12:27
as a mandrel for winding like this
00:12:29
43 millimeter form,
00:12:31
that is, we will wind the necessary coils on it,
00:12:34
the wire will be a little thinner, but there will
00:12:36
definitely be more winding here four and three
00:12:38
tenths of a millimeter to us from it like this, we
00:12:41
take the end like this,
00:12:44
we put it here, we only need two
00:12:48
coils 1 we have three and a half
00:12:52
turns 2 4 and a half turns and so we
00:12:56
wind it like this then this is the first turn because
00:12:58
it reaches this is the first turn like this, here
00:13:00
they are where they intersect, this is the second
00:13:06
turn,
00:13:11
3 turns and a half, that's it, that's it, we have
00:13:16
1 coil ready, you don't even have to
00:13:24
remove the dogs, now we'll also clean the
00:13:25
contacts and
00:13:26
this three and a half turns is
00:13:28
sitting here, but can we do something like this? do something prettier
00:13:32
later, form the turns, there
00:13:35
will be very few of you in such a coil, here
00:13:37
all of these are
00:13:39
easy to do up to 3 and a half and 2 4 and a
00:13:45
half everything is the same, well, I hope
00:13:48
I get it clean, the most important thing here is
00:13:49
to get between 60 and 120 megahertz, the
00:13:52
main thing is that they don’t block sit down with the
00:13:54
wrong preparation of them, they just may
00:13:55
not have what range to carry to cut us,
00:13:59
which is not very good, okay now I want to
00:14:02
do now, we will collect everything and then
00:14:04
we will test if the coils can be
00:14:06
taken like this and moved apart, then the
00:14:09
range will shift and it will be possible in this way to be
00:14:13
rough adjust it right on
00:14:14
the go and we will check at the
00:14:16
dream station there are no special devices
00:14:18
like there is a field indicator and other things,
00:14:21
so we will just look in practice
00:14:23
just a penny station, which means the
00:14:26
normal frequency is not good, you know
00:14:27
the coil, we avoid it, we reduce or
00:14:30
increase it and then we don’t protect it I’ll sing
00:14:32
now Let's understand all this using
00:14:35
scarves like this, I'll make it, you need to
00:14:37
cut it, this is the lazy way, as we
00:14:40
call it here, the main one is the pros and
00:14:44
cons, one
00:14:45
two three 4 5 6 7 8 9 10.
00:14:49
if you need to make cubes here, the
00:14:52
first one we have minus is
00:14:54
used everywhere, so I’ll immediately cut it into
00:14:57
2 parts and use minus the
00:15:00
main contracts from below like this, we
00:15:04
cut the text of the rare advice of this
00:15:05
copper foil which is glued to a non-
00:15:09
conductive layer of some material
00:15:18
like this so we cut
00:15:29
how the sound goes onto a small board, just
00:15:32
roll
00:15:44
[music]
00:15:49
now we tin what happened and the
00:15:54
board is ready,
00:16:06
just like that, we solder all the parts,
00:16:28
well, really, I assembled something like this,
00:16:33
look, it turned out, it’s a super
00:16:36
sweaty installation, but now we just need to check
00:16:40
for a short circuit I'm poking the multimeter
00:16:42
that in between the tracks there hasn't been yet again
00:16:44
about the games connection, the values
00:16:46
seem to be set correctly and the gums I'll
00:16:48
replace this smaller resistor I've put
00:16:50
instead of one kion 560 I've set it to
00:16:52
plus and here's 10 and 6 and 2 kilo-ohms and I have 3 and 3
00:16:57
even 36 so that
00:17:01
the transistor feeds us at a lower voltage, that is, we need to
00:17:03
make the bias on the base
00:17:05
smaller, well, in short, it reduces the resistance of
00:17:08
this resistor and we need to reduce the
00:17:10
resistance of this resistor so that the
00:17:12
total current remains the same photo 9 12 volts,
00:17:14
actually the circuit is supposed to be for
00:17:16
a car f m radio receiver
00:17:18
and we will now have this universal
00:17:20
for all other radio receivers, unless of
00:17:23
course cnd dead parts it will be
00:17:25
just this size and it will be
00:17:28
less than a penny, but I made
00:17:30
all the Soviet parts on old Soviet parts
00:17:32
except these two initiators,
00:17:36
now we will call the coils and check them
00:17:39
it should be closed like this,
00:17:42
but between them there should not be a short circuit between the eyelids, the
00:17:45
initiators are worth it, and so on, in general, I still
00:17:50
made a little mistake,
00:17:53
I placed this coil incorrectly to see how it
00:17:55
should be positioned; it goes to ground; the second
00:17:58
coil also damps vibrations, so this is it
00:18:02
look carefully again when you
00:18:05
assemble
00:18:06
how the coils are arranged, how they stand together,
00:18:08
and so on, well, let’s check everything
00:18:10
else, you’re not shorting,
00:18:13
and so now all that’s left is to solder this
00:18:17
circuit here and you can go anywhere and
00:18:20
place it here, there’s a place
00:18:22
here instead of a lot right behind the speaker,
00:18:24
the main thing is to solder the plus and minus, the
00:18:26
red one is the plus, here it is, and the
00:18:28
resistor which and the minus are in common with the
00:18:31
bottom and you need to turn it.
00:18:37
we remove the board as a last resort, if you do
00:18:40
n’t want to bother at all, you can
00:18:42
throw the plus and minus here, here
00:18:44
it comes from the power supply from the
00:18:46
batteries, but everything will be
00:18:47
switched on here and there and it will still drain
00:18:50
the battery,
00:18:54
so the scale is more accurate,
00:19:03
well, 6 am gem
00:19:11
[applause]
00:19:16
yes, here it is 42 volts, here are the files, plus
00:19:21
here you see, in the middle of
00:19:23
the switch,
00:19:25
there goes further to the resistor stone and
00:19:28
then over there goes to the power supply, all this is
00:19:33
soldered like a plus, but the mass is just a nickname,
00:19:37
most likely this is the body of the part, well, here is the
00:19:42
mass here is this contact
00:19:46
and the multimeter shows zeros from here the
00:19:49
smell of the mass is
00:19:50
right next to it
00:20:00
so I temporarily soldered
00:20:02
a switch here so that there is no influence from
00:20:05
what I touch
00:20:07
[music]
00:20:08
if you turn on the antenna goes through the
00:20:12
amplifiers and if you turn it off then the antenna
00:20:15
closes directly and that’s how it is
00:20:20
it costs an hour directly, that is, it comes with an
00:20:23
antenna, 1 board, and listen through amplifiers
00:20:31
until there is less interference,
00:20:33
and so everyone appears in Mecca, and here’s a
00:20:38
simple proof that the services
00:20:40
work, although lilac is very weak,
00:20:42
anyway, after many experiments
00:20:44
with different transistors, it’s optimal
00:20:47
for me 316
00:20:49
I found this transistor with
00:20:51
high frequency, it works better than the cotton circuit,
00:20:53
it’s not a local station, there’s not
00:20:56
nearby, I thought there was no tower here, here’s a
00:21:00
view of a standard tynd
00:21:02
if we turn on the iron, we turn it off, too, with
00:21:11
a hiss, so far it’s
00:21:13
possible with the values ​​of
00:21:16
these resistors, I put them on base 3 and 6
00:21:20
I have a kilo ohm and here it costs me 560
00:21:22
ohms to lower the supply voltage
00:21:24
you can somehow build a new one even more accurately
00:21:27
today I already sat all night with
00:21:29
him so it will be done another time, the
00:21:31
circuit works on 9 and dunsford and the house
00:21:34
will be the result yet better much at 3
00:21:37
volts you want a little new helps it seems like you have
00:21:40
n’t heard anything yet so
00:21:44
something appears
00:21:46
accordingly where
00:21:48
this radio will be used just outside the cities
00:21:50
there the effect will be well manifested a
00:22:00
completely different matter
00:22:06
super
00:22:09
days schipper
00:22:11
great spider finally set it up everything
00:22:14
sprinkle directly the switch is no longer
00:22:17
needed and we collect everything and you can give
00:22:20
the gift to your grandfather, it’s not ready for my grandfather, but it
00:22:24
will still be nice to have it here, you can be even more precise with
00:22:27
us setting up the coil, more accurately
00:22:29
adjusting the bias based on the voltage
00:22:35
[music]
00:22:37
brush immediately play
00:22:39
[music]
00:22:47
wires finish anthro you so
00:22:49
I’ll put one so thick and fat on the
00:22:52
antenna because that one was complete
00:22:56
garbage,
00:23:03
we’re all holding this whole thing together, we
00:23:07
don’t skimp on more glue and we place it there, it wo
00:23:11
n’t interfere with the photo on the other side on the
00:23:17
synod, it’s electric, so there won’t be any short circuits
00:23:28
[music]
00:23:46
[music]
00:23:58
[applause]

Description:

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