Post on 15-May-2020
"Super RM" miniature telegraph transceiver
specification version V3
"Super octopus" (Super RM) originally by the SWL laboratory in 02, formerly known as "Rock Mite", has been popular in the United States, is a representative of the repeater receiver! Sales up to 6000 sets. In 2, 3 years ago was introduced into the domestic, conducted by the home fans after localization, named "super chapter
Fish ", and two issue of the journal is published in the "radio", is the domestic HAM.
On the basis of the original octopus, use STC12C4052 as main control chip, joined the computer auxiliary
function, can be flexible entry code automatic transmission, flexible adjustment speed of sending side tone
tone and so on.
Circuit principle
Transmission power: 6 w (9 v power supply), 8 w (12 v power supply)
Frequency: launch the vibration frequency, 7023 KHZ; Receive this frequency: about 7023-7026 KHZ
Working pattern: the CW
Power supply: 12 v (battery or linear regulated power supply is recommended for the)
Antenna: 50 ohms, is not balanced
Main indicators
See the appended drawings at the end of this document page, receiving part is the core of a NE602, inside it includes a balanced mixer, signal after two antenna came in
Crystal filter, into the mixer, oscillation circuit, composed of 9018 sent out the vibration signal at the same time, the two signals after mixing, the SSB/the CW signal directly
Frequency conversion for audio, NE602 output audio again to NE5532 do active low-pass filter and audio amplifier, thus complete the receiving process. So pick
With the rf signals directly mixing into audio receiver to be called "DC" receiver, DC mean frequency directly.Circuit composed of 2 n7000 field effect tube mute circuit to shut down when launch receive, at the same
time STC12C4052 internal timer constitute a side tone audio oscillator, the output to the headset, the
headset with "di tick" audio transmission.
Emission part of using 9018 for oscillation circuit, and then to do the buffer amplifier, 8050, 8050 as
keying, launch control sending and receiving circuit and signal switch, at the end of the class is made up of
class C D882 amplifier, after amplification by 1:4 output transformer do after matching the antenna after
LPF filtering of high frequency signals.
A simple introduction
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Note, not without a dummy load or does not match the antenna signal directly, avoid damage to the circuit!
Component selection
Choose around 130, 9018 magnification D882 magnification selection around 200.
T1 is 1:4 transmission line transformer, ferrite beads in FT37-43 (black) to use the 0.51 mm enameled wire pairs of hinge line and round 6 (see below), then the head of a coil and a tail.
T2 is the high frequency transformer, ferrite beads in FT37-43 (black) to use the 0.51 mm enameled wire winding, primary eight laps, secondary 2 laps (almost inconsistency of triode simulation features, such as it was found that the output power is a bit weak, can change the number of turns to prevail).
Method of use
Production debugging
Before you install all components all the transistor, resistor, capacitor with a multimeter test again. And then control circuit diagram and the identity of the PCB mounting of all components.
General compliance installation sequence of low to high. If there is a solder short circuit after welding must be checked. Due to the suite of MOS field effect tube 2 n7000, in order to prevent electrostatic breakdown, soldering iron should be properly grounded or disconnect the iron welding power supply with waste heat. To install socket in integrated circuit at the same time, this can effectively avoid the core of integrated circuit welding bad.
Checked everything is in order, after turn on the juice and the power of positive and negative polarity must not be wrong. The socket inserted headsets, should be able to hear white noise.
The antenna terminal connected to make a holiday 51 ohms resistor load and access key, testing the machine current, should be more than 700 ma.
Don't long time short answer the KEY launch, or D882 and false heat load is bigger, be damaged. The antenna terminal connected to the antenna, or touch filtering crystal shell, should be able to hear the noise larger or the CW signal.
L1 and L2 is high frequency filter inductance in T37-2 of the iron core is circular and (red) with 16 to 0.51 mm enameled wire around, about 25 cm, inductance around 1 uh.
All less than 1000 pf the capacitors for high frequency of ceramics, greater than 1 uf capacitance for aluminum electrolytic capacitors, all resistance is a quarter w 5% fixed resistance.
Resistance R21 selected value range is 200 ~ 4.7 K, choose the smaller the value, side tone will be, the greater the but choose the smaller values will also to receive the volume have certain attenuation
With the selection of 1 k.
Use half wave dipole antenna, the general conditions have security, communication distance at 500 km
distance from main more see the propagation environment and operator's skills.
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The configuration softwareThrough RS232 serial port and PC suite is linked together, can online configuration code speed,
frequency, maximum working hours, serial ports, prompting hold time, automatic BaoMa, and can use to
type on a keyboard instead of a key.
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The keyboardK5: automatic launch store number
K4: to improve lateral sound frequency
K3: lower side tone frequency
K2: improve the rate of fire
K1: emission reductions
This circuit has the function of automatic identification of automatic and manual keys, as long as the manual button to connect to the mono or referring to the following figure to stereo plug plug in the middle of the ring and the ground can be together, open the power supply when STC12C4052 SCM according to the inserted key for automatic detection.
Key plug wiring diagram
Automatic/manual keys
正常情况下,如不接天线,耳机中应当很安静,如果发现有低频的尖锐叫声,可在NE5532的1-2脚之间,接1只20P--100P左右的瓷片电容,以消除自激。
Under normal circumstances, such as no antenna, the headset should be quiet, if found to have low frequency sound, can be between 1 to 2 feet of the NE5532, pick 1 only 20 p - 100 p Ceramics capacitors, to eliminate self-excited.
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Component listing
Electrolytic capacitor
R1
R2、R3
R4
0
22
100
200
470
1K
CP1、CP4、CP5、CP6
E1、CP7、CP8
CP2、CP3
100uF /16V
10uF /16V
470uF /16V
1uF /16VR5、R6、R26 CP9
R7、R8、R9、R10
R11、R12、R13、R14
R15
The transistor
2.2K D1 1N4755A
1N4148R16、R17、R18、R19、R20、R21、R22、
4.7K D2、D5、D6、D7、D8R23、R24、R25
R27、R28、R29 10K
22K
D3、D4 1N4001
9018R30、R31 Q1
R32、R33 47K Q2
Q3、Q4
Q5
D882
R34 100K
220K
470K
8050
R35、R36 2N7000
8550R37、R38 Q6
Q7、Q8、Q9
D10
9013
W1、W2 47K(473) LED
LEDinductance D9
IC
U1
U2
U3
7805
NE602(DIP8)
NE5532(DIP8)Ceramics capacitors
C22、C23、C24、C25、C26、C27、C28、0.1uF(104) U4
U5
STC12C4052AD
MAX232E
C29、C30、C31、C32、C33、C34
C13、C14、C15、C16、C17、C18、C19、0.01uF(103)
C20、C21
C1、C2、C3、C4
C7、C8
33pF
100pF(101)
56pF
Other components
J1 BNC(Q9)
DCC5、C6 J2
J3C9、C10、C11
C12
470pF(471)
1000pF(102) J4
crystal RS232
Y1、Y2、Y3
Y4
7.023MHz SW1、SW2
SW3、SW4、SW511.0592MHz
Heat sinks
0.51mm Enameled wire
PCB × 1
FT37-43
Fixed resistor
Adjustable resistance
3.5mm(PHONE)
3.5mm(KEY)
T37-2
T1,T2
Magnetic beadsZ1
L1,L2
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The identification of color ring resistance and ceramics capacitors
Electrolytic capacitor has positive and negative polarity, insert the PCB for installation, please make
sure is negative corresponding correct, please do not install the wrong.
The polarity of the electrolytic capacitor
62=62pF 102= 1000pF
Ceramics electric capacity of capacitor on pF power of F - 12 (10) for the unit, some products using annotations directly, such as 1000 p, 1000 p, etc.;
More to index notation, such as 102, 102, the first two digits is an effective number of capacitance, behind a single digit is added after the number of zero, such as 102 said behind effective number is 10, 2, add 2 0, namely 1000 pf; Said 221 behind the number 22, 1, add 1 0, namely 220 pf.
Color ring resistance, the most common type of precision and accuracy of 1% with 5%, with 5% accuracy for
four color ring, 1% accuracy for five color ring, reads as follows:
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+
-
-
+
The circular coil winding
This suite includes two kinds of magnetic ring: 43 and T37 FT37-2, including FT37-43 appearance color is black, T37-2 in red, when the winding don't misjudge.
The circular coil number of turns of the judgment reference below:
The coil number of turns is 8 circle, at the same time pay attention to
the coil to be evenly distributed around the annular core.
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IC
Identification of a transistor
D882 pin arranged 9018, 8050, pin is arranged
1n40011n4148
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Object reference
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1 2 3 4 5 6
D
C
B
A
D
C
B
A
VCC_12VT1 C8
C19103Q6
8550CP116V/100u
C25 L2100pF
T37-2
J1R10
C16103
L1 1R3247K
FT37-43 T37-2C11470pF
2ANT2
1104D81N4148
C12 C9470pFR33
47KC13
103
Q2D882
1000pFT2
R111K
Y1 Q19018
D21N4148W1
47KR34
100K FT37-437.023MHZ D1
1N4755AD31N4001
C6 C7 Q38050C15
103VCC_12VJ2 1
23
Z1 56pFR3122K
100pFC556pF
123
R141K
FB
D41N4001
CP216V/470uF
CP316V/470uF
C28104
CLK R322/1W
R4100
Q48050R12 C23
1041K
Y2 Y3 C4
7.023MHZ 7.023MHZ
C3
33pFD61N4148
D51N4148
33pF
D10U17805
VCC_12VR5 R7 VCCVCC R2200 470 Vout VinLED_TX 22/1WQ8
9013C34104 C33
104CP416V/100uF
CP516V/100uF
CP616V/100u
R254K7
U2TR INA VCCC17
103
D9 INB OSCE
OSCB
OUTB
R37470K
CP716V/10uF
R152K2R23
4K7R8
VCC470 GND
OUTA
C18
C31
CLK103 U3A CP8
Q99013
LED_RX R28 U3B C14
103
104
104
10KR29NE602 C21
103NE5532 16V/10uF
C32 NE5532 Q52N7000R30
22KJ310KQ7
9013 R35R131K
R38 2 1220K 2W247K
1R9 470K
C10C20103
PHONE
VCC 470 470pFRS232 R36
220K162738495
VCC_12VU5
C27 104 21
14 TXXRXX
VCC D7V+C1+
T1OUTR1IN
R6131112
5
5
E15 R10470
VCCTXDRXD 200C26 104
C30 104
3
4
T1IN VCC 1N4148C1- R1OUT 5 R164K7
CP916V/1uF
16V/10uF
10K7 U4C2+ T2OUT
T2INR2OUT
R2IN
R27
Y4
109
1
4
12 TRRST ADC0/P1.0ADC1/P1.1ADC2/P1.2
56
13141516171819
C22C29 104 C2-
V- 8 com C1 30pF R26XTAL2
ADC3/P1.3 R22 200~4K7J4
MAX232E 10411.0592MHz ADC4/SS/P1.4
ADC5/MOSI/P1.5ADC6/MISO/P1.6ADC7/SCLK/P1.7
VCC5 R24
4K7
4K7XTAL1 VCCC2 30pF
236789
P3.0/RXDP3.1/TXDP3.2/INT0P3.3/INT1P3.4/ECI/T0P3.5/T1/CEX1/PWM1
KEY20
10
VCC
GND
R214K7R18
4K7VCC R19
4K7SW1SET
SW5SETSW4
SETR174K7
C24104
R204K7
SW2SETSW3
SET11 P3.7/CEX0/PWM0
STC12C4052AD GNDVCC
VCC VCCVCC VCC
1 2 3 4 5 6
When debugging,If found to have low frequency of sharp sound,Can be in U3 NE5532 between 1 to 2 feet, 1 100 p capacitance.
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