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hamradio

Amateur Radio (Hobby)

радиосвязь

радиолюбительство

радиолюбители

радиостанция

рация

связь

приёмник

scanner

uniden

receiver

радиостанции

обзор

00:00:04

[music]

00:00:07

hello, I will continue to tell you

00:00:09

about the radius carved receivers, that is, about

00:00:11

the receivers are not intended for receiving

00:00:13

radio broadcasting stations, I am intended

00:00:15

for listening to radio communication signals,

00:00:18

today it will be a uniden BC 72 receiver, the

00:00:28

full name of the uniden BC

00:00:31

72 xlt receiver is one of the cheapest of the

00:00:34

most simple radii of prominent receivers

00:00:36

in general and the uniden receiver in particular,

00:00:39

this receiver is made for the American

00:00:41

market, but this does not prevent it from being used

00:00:43

somewhere else in the world; it’s

00:00:44

just that some functions will remain

00:00:45

unclaimed. Uniden receivers have

00:00:48

such a feature, the simpler the receivers are, the

00:00:50

narrower the frequency range it is.

00:00:52

the better its characteristics work, the

00:00:55

better it is, first of all, the dynamic

00:00:56

ranges in non-band selectivity,

00:00:58

this receiver in general

00:01:00

works there a little better than the much more

00:01:03

expensive uniden receivers operating in a

00:01:05

wider frequency range, and so the

00:01:07

frequency range of this receiver is not

00:01:09

continuous but consists of three segments

00:01:13

of three sections, the first section is the low

00:01:16

band from 25 to 50 4 megahertz, yours

00:01:19

covers 27 megahertz and 40 and 50

00:01:22

megahertz, the second section is the evening

00:01:25

range, which is divided into two parts, the

00:01:27

aviation band is 108,137 and the radius

00:01:31

in the spring, the usual range is 137,174

00:01:34

megahertz and 3 section is its check range

00:01:37

from 406 megahertz to 512 megahertz, more and more,

00:01:40

no other ranges,

00:01:42

this receiver does not work, not even 300

00:01:44

megahertz, you can’t listen to it, and

00:01:46

you can’t even listen to the broadcast range

00:01:48

88-108 MHz and there are no such frequencies, and

00:01:51

white f m modes are also in this

00:01:53

there is no receiver, we can say that this is a very

00:01:57

highly specialized receiver, it is designed

00:01:59

exclusively for listening to radio

00:02:00

communications of ordinary voice radio communications and

00:02:03

there are no other capabilities in it; you

00:02:06

cannot listen, observe various

00:02:07

other frequency sections; moreover, it

00:02:10

has amplitude frequency modulation, but

00:02:13

the user cannot switch it

00:02:15

manually is turned on automatically or

00:02:17

one or the other depending on the range,

00:02:18

and so in the range of 27 others, that is, from

00:02:22

25 to 28, only amplitude modulation is turned on

00:02:26

in the rest of the body of the bed, only frequency modulation

00:02:28

in the aviation range, also

00:02:31

only amplitude modulation, and in all

00:02:33

other ranges 137 174 Ilyichev

00:02:36

only frequency modulation is such a

00:02:38

rigid binding in this receiver, in

00:02:41

general, it will not interfere with its

00:02:43

use in any way, and in ninety-nine and

00:02:44

nine percent of cases, since warbend is

00:02:46

naturally only amplitude modulation,

00:02:48

you need to listen to 27 megahertz on such a

00:02:51

receiver in the small majority of

00:02:53

cases, no one will need it in the

00:02:56

first place everyone will listen to which

00:02:57

if i and ii chef, well, maybe also low

00:02:59

band and our band, naturally in these

00:03:02

modulation ranges everything is fine with this receiver,

00:03:04

well, even if someone wants to obey

00:03:06

truckers on 27 135, then it is in

00:03:08

amplitude modulation that they are there

00:03:10

they work in the same way as this

00:03:13

receiver works, in general the functionality of this

00:03:15

receiver is very strictly limited, somewhat

00:03:17

reminiscent of even a sea beach

00:03:18

radio station in which the channel frequencies are

00:03:20

programmed, nothing

00:03:21

can be changed, here a lot of things

00:03:24

cannot be changed either except modulation, here

00:03:26

the user also cannot control the

00:03:28

tuning step the step here is also

00:03:30

fixed and in most ranges

00:03:32

it is equal to 5 kilohertz and in the

00:03:35

range of veche flow bendy

00:03:37

it is equal to 5 kilohertz itself in the aviation

00:03:40

band for some reason it is equal to 12 and a

00:03:42

half kilohertz itself although no one there

00:03:44

works with such a step in Basically,

00:03:46

99 and 9 percent of all radio traffic is carried out in

00:03:48

steps of 25 kilohertz, but in general these are two

00:03:51

tuning steps of 12, which are available in this

00:03:54

receiver, and in its h range the

00:03:57

tuning step is 625 kilohertz, which in

00:03:59

general is also not bad, but the best step is of course

00:04:02

could be changed by the user himself, here

00:04:04

this function is not present, these are the strict

00:04:07

restrictions in this receiver if you

00:04:09

know what frequencies you want to

00:04:11

listen to, want to observe certain

00:04:13

frequencies in different orders, scan them,

00:04:15

divide them into some groups, listen to one

00:04:18

group or several groups, manage

00:04:19

these groups,

00:04:20

then in general then all this can be done in this

00:04:22

receiver; there are no restrictions associated with the

00:04:24

tuning horns of the modulation, you

00:04:27

most likely will not be prevented from doing this,

00:04:29

so the receiver is actually

00:04:30

quite multifunctional;

00:04:33

it will allow you to listen to a lot of things; the

00:04:34

user interface of this receiver is

00:04:36

usual for uniden receivers and

00:04:39

some other manufacturers,

00:04:40

but If you have not used such

00:04:42

receivers and only used

00:04:44

different radio stations, at

00:04:46

first you will find the user interface of this

00:04:48

bait very very

00:04:50

unusual and very inconvenient, but in

00:04:52

fact it is not inconvenient, it’s just

00:04:54

very different from the

00:04:55

user interface of radio stations, it is

00:04:57

optimized specifically for searching and

00:04:59

scanning for monitoring broadcasts,

00:05:01

so it is very different from a

00:05:03

radio station where the interface is optimized

00:05:05

for other purposes

00:05:20

[laughter]

00:05:31

in general, usually within a radius of connected

00:05:33

receivers there are three main

00:05:35

operating modes, the first mode is the myth mode when

00:05:38

the receiver is set on the same frequency and

00:05:40

the user can either use buttons

00:05:42

or using the wolfhound to control this

00:05:44

frequency, change it with a certain step,

00:05:46

for example, dial a

00:05:48

new frequency directly from the keyboard,

00:05:50

but the receiver itself does not perform any action; the

00:05:51

second mode, usually found

00:05:54

in all radius-carved receivers, is

00:05:56

search; in this mode, the user sets the

00:05:59

boundaries of the frequency range that the receiver

00:06:02

should view and this receiver

00:06:04

will run from lower frequencies to

00:06:05

upper ones with a step set by the user

00:06:07

and look for some kind of activity there, you

00:06:09

can combine several such

00:06:12

sections of ranges in the receiver and it

00:06:14

will search not in one range, but in

00:06:16

several different

00:06:17

ranges described to users, and the third mode

00:06:20

is scanning when the receiver

00:06:22

goes through channels In memory,

00:06:24

we usually see this mode in portable radio stations

00:06:26

when we have written down in a

00:06:29

memory cell what frequencies we start

00:06:30

scanning through these memory cells.

00:06:33

In receivers, this mode is also usually

00:06:34

there, it is called scan, that

00:06:36

is, once again a thriller,

00:06:37

usually from the receiver to the top search and

00:06:41

scan and in uniden receivers there is

00:06:43

usually a wave mode, but there is no mode at all in

00:06:46

Aura receivers there is usually a

00:06:48

dfu mode in almost all of them, but uniden and that’s how it

00:06:50

comes in, so in this

00:06:51

receiver there are two main modes:

00:06:54

scanning and search, of course in the

00:06:57

search mode you can press the hold button,

00:07:00

this is stop search, it also works

00:07:02

in scanning mode, and if we

00:07:05

stop scanning in search mode, then you can

00:07:07

use the up and down buttons

00:07:09

to change the frequency with a selected step

00:07:12

manually, almost like the top mode, but

00:07:14

the only difference is that you

00:07:16

can change the frequency only within the receiver

00:07:18

controls specified for the search range

00:07:21

there are such natural ones, a

00:07:23

keyboard on the front panel and a

00:07:25

liquid crystal monochrome display,

00:07:27

there are two analogue knobs on the top

00:07:30

side, this is a volume control and a

00:07:31

squelch control, the knobs are

00:07:34

not combined with anything, just independent

00:07:36

separate knobs at any time

00:07:37

you can take and instantly change the

00:07:39

squelch settings or change

00:07:41

the volume very conveniently, you don’t need to press any

00:07:44

button, you just turn the knob

00:07:46

for receivers for devices, so to speak,

00:07:49

search monitoring, listening to

00:07:51

something in portable mode, this is a very

00:07:54

important function so that you can

00:07:55

instantly turn down the volume if something happens

00:07:57

so as not to disturb anyone or give

00:07:59

yourself away, or vice versa turn it up and if

00:08:01

you heard some interesting signal,

00:08:04

here these are two separate knobs, the

00:08:06

volume knob is not combined with the

00:08:08

power switch, which is also a big plus, so

00:08:10

there is a separate power button

00:08:12

here on the case, also not combined with anything, it

00:08:14

simply turns

00:08:15

the receiver on and off and, accordingly, turning on

00:08:18

the receiver we immediately find ourselves in the

00:08:21

same volume position as we

00:08:23

turned it off, that is, the knob does not need to be changed; there are no

00:08:25

more control levels on the

00:08:27

body; the receiver has no connectors; the following

00:08:30

beyonce antenna connector is included with the

00:08:32

receiver; this antenna is given here,

00:08:34

supposedly it is positioned for the entire

00:08:37

operating range Well, of course,

00:08:38

it works best in the range of which if,

00:08:41

having increased a little similar to the lobby of India

00:08:44

27, it is practically ineffective; also

00:08:47

on the top side of the case there is a

00:08:49

three and a half millimeter jack for

00:08:51

connecting headphones or an external

00:08:52

speaker; there is also a connector on the side

00:08:55

wall for connecting the

00:08:56

power adapter, unfortunately the voltage The required power supply

00:08:59

for this connector is 6 volts, not 12

00:09:02

a6, not very convenient, but the

00:09:06

receiver usually comes with this same

00:09:07

six-volt adapter, you can

00:09:09

use it; there are no other connectors on the

00:09:11

receiver body. There is a

00:09:13

battery compartment in which

00:09:15

two batteries are installed, or two

00:09:18

batteries under the batteries on the

00:09:20

body. receivers inside in the

00:09:21

battery compartment there is a switch for the

00:09:24

type of batteries one type is disposable

00:09:27

alkaline batteries the second type and these are

00:09:29

nickel-metal hydride

00:09:31

batteries when using

00:09:33

nickel-metal hydride batteries and an

00:09:34

external 6 volt adapter,

00:09:36

these batteries are

00:09:38

simply charged with a fixed current except for the

00:09:41

network adapter with the receiver Also included in the

00:09:42

kit is this plastic

00:09:45

clothespin which is installed on the back side of

00:09:47

the case using two

00:09:49

screws. I never installed my clothespin and have

00:09:50

n’t even unpacked it. I still

00:09:52

have the package, although I bought the receiver 10

00:09:55

years ago somehow I didn’t need it. No

00:09:58

clothespin. This is a

00:10:00

paper instruction that can be downloaded as a

00:10:03

pdf and that’s what I actually did on

00:10:05

the computer, it’s somehow more convenient for me to read than

00:10:07

paper, but it exists and is supplied

00:10:10

with the receiver. There is a separate

00:10:12

button for turning on the display backlight. The

00:10:14

backlight stays on for a while then

00:10:17

turns off automatically unfortunately.

00:10:18

There is no keyboard backlight, the button is just

00:10:20

black during operation,

00:10:22

scanning modes, that is, when the receiver

00:10:24

goes through memory cells, frequencies are not displayed on the screen,

00:10:26

but the

00:10:28

message scan in search mode hangs when

00:10:31

the receiver is looking for activity in the specified

00:10:34

frequency range, the current frequency at a given time is already directly

00:10:36

displayed on the screen

00:10:39

developers this receiver did not try

00:10:42

to achieve the maximum of some

00:10:43

gigantic sensitivity of this

00:10:45

receiver, therefore, as a result, the

00:10:46

dynamic range also turned out to be not

00:10:48

completely terrible, and this receiver, except

00:10:51

for the standard antenna, at least how can you

00:10:53

work with some external antennas,

00:10:55

of course, a

00:10:56

highly efficient antenna is installed

00:10:58

high in the large in a

00:11:00

city in a large populated area it doesn’t

00:11:01

work, but at least with some simple

00:11:03

external antennas it still allows you to

00:11:05

work, and so its sensitivity in the

00:11:08

evening is in the range of 0-3 microvolts, but

00:11:12

offended it’s the same in the range of 0-4

00:11:15

microvolts and the screams are difficult modulation in

00:11:17

half microvolt modes and the value is

00:11:20

not very high; for many radio stations, the

00:11:23

sensitivity is usually better than 02

00:11:25

microvolts 015 017 and so on, here

00:11:27

it is stated 03 in speech in the range in frequency

00:11:31

modulation, in fact, in practice,

00:11:33

this difference is almost not noticeable in the city, the

00:11:35

whole signal is very the powerful level of interference is

00:11:37

usually very high, so such a

00:11:40

sensitivity it will have a more or

00:11:41

less normal difference in the quality of

00:11:44

reception with a conventional portable radio station

00:11:46

whose stated sensitivity is 015

00:11:48

microvolts and we usually will not notice the current

00:11:51

consumed from the batteries in standby

00:11:53

mode when the noise suppressor is closed and the

00:11:55

backlight is turned off 110 milliamps it

00:11:57

may seem at first glance,

00:11:58

this is a lot, but in fact there are

00:12:00

only two batteries and the

00:12:02

supply voltage when installed here is not a battery; the

00:12:06

battery is all two and a half volts,

00:12:08

so for such a low voltage

00:12:10

this is a completely normal current in its

00:12:13

architecture and circuit design, this is an ordinary

00:12:15

classic analog receiver with a

00:12:17

digital synthesizer with PLL

00:12:18

3 frequency converter 1 to 4 180 megahertz 2

00:12:22

20 13 megahertz and third 450 kilohertz

00:12:26

natural no digital processing or

00:12:28

anything else like this in this receiver

00:12:30

everything is at a minimum

00:12:36

[music]

00:12:44

[laughter]

00:12:47

[music]

00:12:54

in scanning mode receiver has

00:12:57

only 100 memory cells 100 channels for a

00:13:00

scanning receiver, this is very little

00:13:02

at first glance, but in fact, for

00:13:04

most cases,

00:13:05

listen to the entire broadcast in some small

00:13:08

locality or some

00:13:10

specific group of only signals in

00:13:12

any even very large

00:13:14

locality, for example frequencies local

00:13:15

airfields or something else local

00:13:18

amateur cleanliness is quite

00:13:20

enough these 100 memory cells 100

00:13:23

channels are organized into 10 banks of 10

00:13:26

pieces in each

00:13:27

toning is started by pressing the

00:13:29

scan button after that the receiver immediately

00:13:31

scans any number of channels any

00:13:34

number of banks can be scanned at one

00:13:36

time one bank, that is, 10

00:13:38

memory cells, two banks 3 or

00:13:40

as many as you like, turn banks on and off

00:13:43

by pressing buttons with numbers,

00:13:45

press 1, which means the first bank, add

00:13:47

2, you know the second bank and we see which

00:13:49

banks are currently selected for

00:13:51

scanning, you can scan with any

00:13:53

number banks from one to ten

00:13:54

in general the binding of channels to banks is rigidly

00:13:58

fixed nothing can be configured

00:14:00

nothing can be changed the search mode

00:14:02

approximately also there are 10 memory cells

00:14:04

that describe the boundaries of the

00:14:06

frequency sections for search the search is started by

00:14:09

pressing the function button and then the

00:14:11

scan button after that the receiver

00:14:15

scans one or several ranges

00:14:16

in the same way by pressing buttons with numbers we

00:14:19

select which numbers by range

00:14:20

the receiver is now scanning; there is also an

00:14:24

American version of scanning when the

00:14:25

frequencies or boundaries of frequency ranges are

00:14:28

rigidly fixed are written into the receiver;

00:14:30

nothing can be changed there and this

00:14:33

mode is turned on by pressing the

00:14:35

function button and the number 3 at the same time there are

00:14:38

several scanning options, they

00:14:39

are sorted out one by one by pressing

00:14:41

the same buttons again

00:14:56

in the receiver there are 50 cells for storing

00:15:00

exclusion frequencies in search mode, that

00:15:03

is, if the receiver in search mode

00:15:04

constantly stops at some

00:15:06

frequency at which there is a

00:15:08

lot of activity but traffic is on this frequency

00:15:10

for example, is completely uninteresting or

00:15:12

there are carriers at this frequency, then

00:15:14

you can add a list of exceptions to this frequency

00:15:16

in which there can be a maximum of 50 frequencies

00:15:19

in this receiver, and then when searching in the

00:15:22

search mode, the receiver will simply

00:15:23

bypass this frequency and not pay

00:15:25

attention to activity on this frequency

00:15:26

very convenient, this mode is called log

00:15:29

out

00:15:30

in scanning mode, also each

00:15:32

memory cell, each channel can

00:15:34

also be marked as log out and then

00:15:36

the receiver will not scan it

00:15:38

yet in this receiver as in most

00:15:40

other uniden receivers, but not all

00:15:43

have the claus q mode the system is a mode

00:15:47

the ability to detect closely

00:15:49

located sources in hours of radiation from

00:15:52

closely operating radio stations, very

00:15:54

interesting functions for those who like to

00:15:56

observe, walk around the city with the receiver,

00:15:58

you will find where it is

00:15:59

emitted from, roughly speaking, it is a frequency meter built into the

00:16:03

receiver that instantly

00:16:04

detects and measures the frequency of the most

00:16:07

powerful signal that arrives at the input

00:16:09

if several signals,

00:16:11

respectively, the most powerful and after

00:16:13

this purely measure detected

00:16:15

some kind of signal of some exact

00:16:17

frequency, he measured then automatically the

00:16:20

receiving path of this device is

00:16:23

also switched on at this frequency of

00:16:24

the processor, it is possible to command the synthesizers

00:16:26

to also become at this frequency that was

00:16:28

detected stomer if it actually

00:16:31

opens the receiver squelch at this frequency

00:16:32

and there is a signal there when

00:16:34

this claw of schools is triggered, very

00:16:36

convenient functions in more expensive, more

00:16:39

developed uniden receivers, this function

00:16:42

can also automatically

00:16:43

save memory cells, it

00:16:46

cannot save detected frequencies in this receiver,

00:16:47

but it can easy to detect in the general

00:16:50

radiation, this function is turned on by

00:16:52

pressing the faction button and the home button, the

00:16:55

klo schools icon is drawn above it,

00:16:57

let's see how it works,

00:16:59

now I have turned on the Klaus Kol mode, the

00:17:01

receiver is silent, shows an indication of the

00:17:03

activated

00:17:04

Klau Schools mode, now I am at a

00:17:06

car station in the two meter

00:17:07

range here I press the transmission antenna

00:17:11

from this radio station is located on the roof of the

00:17:13

building in which I am, but still the

00:17:15

radiation will be very high, powerful

00:17:17

enough for this receiver and the

00:17:20

claw school will work in it, it will be clear that

00:17:22

my signal has been detected, including the transmission,

00:17:26

the receiver has emitted a

00:17:27

tone signal indicating

00:17:30

that the pieces have worked and also

00:17:32

the noise suppressor was opened in it and we hear from

00:17:35

the receiver all the radio traffic that is

00:17:37

happening at our frequency, to

00:17:39

see at what frequency

00:17:41

the radio traffic was, you need to press the half button,

00:17:43

otherwise the screen will only get

00:17:45

infected with the inscription found,

00:17:47

indicating that radiation has been found, this is such a

00:17:49

small inconvenience or maybe maybe

00:17:51

this is some kind of special function, but

00:17:53

I don’t understand why it did it, for me it was

00:17:55

better to immediately show the frequency

00:17:56

found in the receiver, there are, of course,

00:17:59

many less significant functions of

00:18:01

nuances that are all described in favor of

00:18:04

ska writing in this video, I tell

00:18:06

only the most significant ones

00:18:08

capabilities and features there is no

00:18:11

computer interface for controlling the

00:18:13

receiver from a computer or for

00:18:15

reading a saved record of the

00:18:17

receiver settings, but this is not surprising,

00:18:19

the receiver is the simplest despite the fact that it is so

00:18:21

simple, with the help of it you can

00:18:24

listen to a lot of things, its

00:18:26

functionality, in my opinion, is very

00:18:28

convenient for searching for monitoring for

00:18:30

listening and for detecting some

00:18:32

signals, of course, it does not work in the entire

00:18:35

huge frequency range from 100

00:18:37

kilohertz to gigahertz, but in fact, the

00:18:40

main radio exchange is what

00:18:42

happens which if i and ii h in

00:18:43

the ranges, but also our band is interesting to

00:18:45

listen to

00:18:46

there is also a low band here, so

00:18:48

all the main ranges in this receiver

00:18:51

are there. I used it quite a lot,

00:18:54

as you probably saw in the image,

00:18:56

this is a receiver that is a little shabby and

00:18:58

dusty, and unlike, for example, the

00:19:01

AUR 8 200 I recently showed,

00:19:03

I used this receiver much more often although someone

00:19:05

is 8 208 600 I don’t even remember what it’s

00:19:08

called, it’s much more

00:19:10

expensive, it’s much more functional, but for

00:19:12

some reason I like using this receiver better, I have

00:19:16

other much more expensive

00:19:18

functional receivers,

00:19:19

but despite this, I still

00:19:21

used this receiver quite a lot

00:19:24

for such an inexpensive receiver, the

00:19:27

capabilities and characteristics of this

00:19:28

device, in my opinion, are very good;

00:19:31

normal, not cheap receivers cost

00:19:33

around $500, plus minus expensive ones of

00:19:35

1000 or more, and this carrot costs

00:19:38

around $100, which is very little

00:19:40

for a portable scanning receiver,

00:19:43

and he made it with this limited

00:19:45

functionality, not because it was

00:19:47

produced a very long time ago and then all

00:19:50

receivers were like this with a standing

00:19:51

component, no, it was specially made

00:19:53

so durable, it’s just a cheap model,

00:19:57

at the same time the company

00:19:59

produced much more expensive,

00:20:01

much more functional receivers with

00:20:03

thousands of memory cells and all sorts of

00:20:05

other possibilities, just

00:20:07

such a cheap model was also produced, and that’s

00:20:09

it, my story about the uniden

00:20:12

BC

00:20:13

72 xlt receiver is over, thank you for watching this

00:20:17

video, work on the air from different radio stations,

00:20:19

listen to the broadcast on different receivers,

00:20:21

watch my video, subscribe to the

00:20:24

channel on the VKontakte group facebook

00:20:26

Alexey Igonin was here, goodbye

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Плейлист "Приёмники": https://www.youtube.com/playlist?list=PLoiTe5OknmXoMXw3uJJiC-TEjcLzcLpnG Приёмник Uniden BC72XLT. Один из самых дешевых радиосвязных приёмников (сканеров). Диапазон частот 25 - 54 МГц, 108 - 174 МГц, 406 - 512 МГц. Режимы модуляции АМ/ЧМ Питание 2.5 В (6 В внешнее) В видео рассказано об основных возможностях приёмника, показан приём сигналов на внешнюю антенну дискоконус. Инструкция оригинал: https://vk.com/doc-126082062_566811884 Инструкция на русском: http://www.radioscanner.ru/files/uniden/file12135/ Спасибо за просмотры и подписку! Для помощи каналу и благодарностей: ЯндекДеньги: 410017381931812 PayPal: [email protected] Пишите комментарии, подписывайтесь на мой канал, не пропустите новые видеоролики. Группа ВКонтакте: https://vk.com/igoninalexey Instagram: https://www.facebook.com/unsupportedbrowser Facebook: https://www.facebook.com/unsupportedbrowser

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