"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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