president george modyfikacje - dxx.eu · pdf file · 2015-10-03solder 3 wires on...

PRESIDENT GEORGEMODYFIKACJE

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MODTFIKACJA MOCY

President George CB-Radio50 Watt RF Power modification

To get 50 Watt RF output power for President George, replace finale transistirs Q501 and Q502 2SC1969 with 2SC2094

Cut Collector connection and cut cooling on right side of transistor. Solder 3 wires on the transistor for connection to PCB.

Re-adjust VR201 and VR202 for minimum crossover.

MODYFIKACJA ODBIORNIKA

Receiver modification for President GeorgeVaricap Tuned Circuits

In the first stages of the HF input L2 and C4 is responsible for the selectivity of the receiver. This is a narrowband



filter, and will not cover the hole 26.065 to 28.755 frequency band with full senistivity. To achive maximum sensitivity for 26.065MHz C4 will increase to 36pF, and for 28.755MHz C4 will reduce to 29pF. This is possible by a varicapdiode. To cover the hole band, replace C4 with 22pF ceramic capacitor and connect the varicap tuned circuits across C4. Connect 100kohm resistor to TP2. Set the station to RX AM 27.405 MHz. Connect the DC Voltmeter to TP2 and adjust L405 for 2.5 Volt +/- 0.01 Volt. The VCO-Voltage will then be 4,[email protected] and 1,[email protected]. The BB134 or BB156 is 14pF@1,5Volt and 7pF@4,4Volt, and 14pF||22pF=36pF and 7pF||22pF=29pF. Re-adjust L2 for maximum gain.

C4TP2

Improved receive gainQuieting of SSB and AM reception and improving gain of incoming signals is a common request from radio operators.

In the first stages of the HF input 2SC1674 (Q8) transistor can be found. This transistor is responsible for the amplification of a small detected signals. A problems exist if the transistor itself is noisy as is such the case of the 2SC1674 when compared to other low noise packages. Along with the amplification of the incoming signals is transistor noise. Replacement of this transistor with a higher gain, lower noise transistor greatly improves the signal to noise ratio of your receiver.

The transistor Q8 operates at VCE= 6Volt and IE= 2,5mA. We will use an 2SC2999 transistor that has higher gain and lower noise characteristic. Replace 2SC1674 (Q8) with 2SC2999 (or similar low noise and high gain transistor) to achieve this improved signal to noise ratio. Re-adjust L2. The gain will improved with more than 6dB with the same signal to noise ratio.



P£YNNA REGULACJA CZÊSTOTLIWOŒCI

President George CB-RadioHow to modify The George for external control of VFO.

1. Disconnect the wire in the middle of the connector J408 on the principal plate (Mother board). 2. Take off (remove) the adjustable VR211 (TX-frequency adjust). 3. Connect the wire you took off (J408) and solder it at the place middle point of the adjustable VR211 (Diode side D215) 4. Cut the middle of the wirw linking the modulation between MIC CONNECTION plate and MIC GAIN plate, position 2 on both connectors (near the orange wire).



5. For the part of the wire connected to the MIC CONNECTION plate; solder the other side onto J408 on the principal plate. 6. For the part of the wire connected to the MIC GAIN plate; solder the other part on VR211 strapp side (The other part is on the ground) 7. Replace R408 1kohm by an 500 ohm adjustable potentiometer 8. Solder the two contacts of the potentiometer MIC GAIN.9. Set MIC GAIN in middle, and adjust R408 500 ohm potentiometer to get 27.205 MHz.10. You can now use MIC GAIN for adjusting the center frequency.

PROGRAMOWANIE

President George CB-RadioResetting Access Codes

a) Depress POWER NB/ANL and PROGRAM simultaneously and keep pressed down to the display lit off. b) Release POWER and keep pressed NB/ANL and PROGRAM down: "codE" flashes in the display, and wait for "codE" disappears. c) Release NB/ANL and PROGRAMd) Push MODE one times. e) Push M1 one times. f) Push M3 one times. g) Push PROGRAM one times. h) Push PROGRAM 4 times. i) Push POWER

Changing the configuration

Programming :a) Turn your set on by pushing POWER. b) Turn your set off by pushing POWER, c) Depress POWER and keep pressed down. Your set goes on and then goes off. d) Keep POWER depressed and press PA and DIMMER simultaneously. e) Release POWER after 5 sec. while keeping PA and DIMMER pressed down: ''codE'' flashes in the display for 5 seconds. f) ''codE'' disappears and the display remains lit up. g) Release PA and DIMMER. h) Press :M1



for 240 ch. FM/AM/SSB (International configuration, 20 Watt AM/FM, 50 Watt SSB), the display goes out.M2for 40 ch. FM 4 Watt and ch. 4-15 AM 4 Watt (Germany), the display goes out.M3

for 40 ch. FM 4 Watt (CEPT), the display goes out.MODEfor 40 ch. FM 4 Watt (Britain and Poland), the display goes out.PROG

for 40 ch. AM/FM/SSB 4 Watt (French standard), the display goes out. i) Enter your access code, then press POWER. Your set is now in new configuration.

Available functions in the international configuration:

DIMMER:In the international configuration only, the DIMMER key allows you to change band, thereby giving you the use of 240 channelsA short depression allows you to advance by one band at a time - A B C D E F A.... (6 bands, 40 channels),A longer depression allows you to do the same thing in reverse - F E D C B A F ..... SELECT.This key allows you to go up or down by 5 KHz at a time around the reference channel. It is used in conjunction with the CH UP and CH DOWN keys.

Display test:a) Turn your set on by pushing POWER. b) Turn your set off by pushing POWER, c) Depress POWER and keep pressed down. Your set goes on and then goes off. d) Keep POWER depressed and press M1 and CH19 simultaneously. e) Release POWER after 5 sec. while keeping M1 and CH19 pressed down: ''codE'' flashes in the display for 5 seconds and the station vil start Display-Test. Push M1 to stop test.

Adjustment



VR 205 Adjust for 30 Watt AM in international modeVR 206 Adjust for 30 Watt FM in international modeVR 210 Adjust for 4 Watt FM in CEPT mode



VR 601 Adjust Ecco

VR 212 Adjust FM-Deviation (FM-Modulation) VR 207 Adjust AM-ModulasjonVR 208 Adjust SSB-Modulation

VR 3 Adjust S-Meter for SSBVR 4 Adjust S-meter for FM/AMVR 213 Adjust Modulation MeterVR 204 Adjust RF-meter (Power output)

Remote Control for President George

How to use PA-Jack for Remote Control.

P£YTKI

CZO£OWA



ECHO

ROZMIESZCZENIE ELEMENTÓW



ROZSZERZENIE PASMA NADAWANIA



PLL Converter for President GeorgeConverter for 12-meter and 10-meter HAM-Radio Band

The President George PLL-Circuit

The VCO generate 36.760MHz to 39.450MHz. The transmit/receiver frequency is fVCO - 10.695MHz.

The Converter

The Converter consist of an Mixer, 2.000MHz X-Tal Oscillator and a Band Pass Filter. The Band Pass Filter`s input controls the band select and fine Tuning in the band.

The Converter is connected in the PLL feedback-loop, and will convert the VCO-frequency 2MHz up or down. This will let the PLL2002A to beliwe that the VCO-frequency allways is 36.760MHz to 39.450MHz. In the High Band (10-meter) the Display will be 26.065 in Band A Channel 1, so you have to add 2MHz to the Display value. In the Low Band (12-meter) the Display will be 26.065 in Band A Channel 1, so you have to subtract 2MHz from the Display value.

The President George PLL-Circuit with Converter



The Converter will cover 10-meter band, 11-meter band and 12-meter band. Remove C433. Insert the Converter between TP1 and PLL2002A Pin 8. Connect the Control input to a 3-way switch, + 8 Volt at top and GND at bottom (the midle pin left open).

The VCO will now generate 34.760MHz to 41.450MHz, and the Transmitting/Receiving frequency is 24.065MHz to 30.775MHz. The transmit/receiver frequency is: fVCO - 10.695MHz + 2MHz for Control=LOW (10-meter band) fVCO - 10.695MHz for Control=OPEN (11-meter band) fVCO - 10.695MHz - 2MHz for Control=HIGH (12-meter band).

Circuit Diagram

Component Type/Value CommentD1 NE612 Balanced RF Amplifier and OscillatorD1 BB809 VHF variable capacitance diodeD2 BB809 VHF variable capacitance diodeL1 1uH DrosselL2 0,6uH/0,8uH Adjustable CoilR1 47kR2 47kR3 47kR4 47kR4 6,8kC1 4,7nFC2 4,7nFC3 12-22pF Trimmer



C4 10pFC5 120pFC6 120pFC7 100pFC8 100pF

UK£ADY I TRANZYSTORY

DRIVER

2SC1973 Silicon NPN Transistor

RF Amplifier

The 2SC1973 is a silicon NPN epitaxial planer type transistor designed for RF amplifiers on HF band mobile radio applications.

B C EApplication:

· Driver Amplifier Applications in HF BandAbsolute Maximum Ratings: (TC = +25°C unless otherwise specified) Collector-Emitter Voltage (RBE = Infinity), VCEO 55VCollector-Base Voltage, VCBO -VEmitter-Base Voltage, VEBO -VCollector Current, IC 0,5ACollector Power Dissipation (TA = +25°C), PD 1WOperating Junction Temperature, TJ +135°CStorage Temperature Range, Tstg -55° to +150°CThermal Resistance, Junction-to-Ambient, RthJA -°C/W



FILTR CZÊSTOTLIWOŒCI

TOKO Y219SBS-344 Band Pass Filter

ELECTRICAL CHARACTERISTICS: Center frequency, fo : 28MHz- 3dB bandwidth at fo: 5.0MHz min. Insertion loss at fo: 2dB max. Selectivity @ fo + 20MHz : 45dB min. Selectivity @ fo - 20MHz : 23dB min. Ripple in passband: 1dB max. Input impedance : 2,25 kohmInput capacitance : 3pFOutput impedance : 2,25 kohmOutput capacitance : 2,5pF



MIXER

AN612 Modulator / Demodulator / Mixer

Pin Name Description1 Signal input2 Bias input3 Signal input4 GND Ground5 Bias output6 VCC Positive Supply Voltage7 Output



MODULATOR2SB1133

Silicon PNP Transistor 60 Volt - 3 Ampere - 20 Watt

The 2SD1133 is a silicon PNP epitaxial planer type transistor in TO-220ML package, designed for LF Power applications.

B C E

PAMIÊCI 8-BITOWE

M54995FP 8-BIT SERIAL-INPUT LATCHED DRIVER

DESCRIPTIONThe M54995 is a semiconductor integrated circuit consisting of 8stages of CMOS shift registers and latches with serial inputs andserial or parallel outputs. It is based on Bi-CMOS processtechnology, and has 8 bipolar drivers at the parallel outputs.

FEATURES



l Serial input and serial or parallel outputl Serial output enables cascade connectionl Built-in latch for each stagel Enable input provides output controll Low supply current (standby current ICC=10mA) l Serial I/O level is compatible with typical CMOS devicesl Driver features: High withstand voltage (BVCEO=30V) l Wide operating temperature range Ta=-20 – +75°C

FUNCTIONThe M54995 consists of 8 stages of D-type flip flops connected to8 latches.Data is input to serial input S-IN, and clock pulses are input toclock input T. When the clock changes from low to high, the inputdata enters the first shift register and data already in the shiftregisters is shifted sequentially.The serial output S-OUT is used to connect multiple M54995 toexpand the number of parallel outputs. S-OUT is connected to S-INof the next stage.For parallel output. When the clock pulse changes from low tohigh, latch input (LATCH) is high and output enable input (EN) islow the serial input data at S-IN appears at output O1 and the otherdata already present is shifted sequentially to outputs O2 throughO8.The parallel outputs are inverted.When the latch input is held low, the latch retains the stored data.When the EN input is high, outputs O1 through O8 all turn off. Asthe internal logic is unstable when the power is turned on, the ENinput should be kept high (setting outputs O1 through O8 off) untilinput data is set and the internal logic is initialized.L-GND is the GND of CMOS logic circuit and P-GND is the GND ofoutput driver circuits O1 through O8 which employ bipolartransistors capable of large drive currents.

Pin Name Description IC405 in President George1 T2 S-IN3 L-GND4 Vcc5 S-OUT6 LATCH7 /EN8 P-GND9 /O8 S/RF10 /O7 SWR11 /O6 CAL12 /O5 MUTE13 /O4 PA14 /O3 T/R15 /O2 DIM16 /O1

Pin Name Description IC406 in President George1 T2 S-IN3 L-GND4 Vcc5 S-OUT6 LATCH7 /EN



8 P-GND9 /O8 ECHO10 /O7 HI CUT11 /O6 NB/ANL12 /O5 USB13 /O4 LSB14 /O3 AM15 /O2 FM16 /O1

PODWÓJNY PRZEDWZMACNIACZ OP.

Dual Operational Amplifier

SWITCHING TRANZISTOR 1

2SB1143 PNP Transistor 50 Volt 4 Ampere 10 Watt

The 2SB1143 is a silicon PNP epitaxial planer type transistor in TO-126ML package, designed for Voltage regulators, relay drivers, lamp drivers, electrical equipment.



SWITCHING TRANZISTOR 2

2SD1667 NPN Transistor 50 Volt 5 Ampere 25 Watt

The 2SB1143 and 2SD1683 is a silicon PNP/NPN epitaxial planer type transistor in TO-220ML package, designed for Relay drivers, high-speed inverters, and other general high-current switching applications.

B C EAbsolute Maximum Ratings: (TC = +25°C unless otherwise specified) Collector-Emitter Voltage (RBE = Infinity), VCEO 50VCollector-Base Voltage, VCBO 60VEmitter-Base Voltage, VEBO 6VCollector Current, IC 5ACollector Power Dissipation (TA = +25°C), PD 2WCollector Power Dissipation (TC = +50°C), PD 25WOperating Junction Temperature, TJ +150°CStorage Temperature Range, Tstg -55° to +150°C

TRANZYSTOR MOCY



2SC1969 Silicon NPN Transistor Final RF Power Output

The 2SC1969 is a silicon NPN epitaxial planer type transistor designed for RF power amplifiers on HF band mobile radio applications.

B C E

Features:

· High Power Gain: Gpe >/= 12dB (VCC = 12V, PO = 16W, f = 27MHz)

· Ability to Withstand Infinite VSWR Load when Operated at: VCC = 16V, PO = 20W, f = 27MHz

Application:

· 10 to 14 Watt Output Power Class AB Amplifier Applications in HF BandAbsolute Maximum Ratings: (TC = +25°C unless otherwise specified) Collector-Emitter Voltage (RBE = Infinity), VCEO 25VCollector-Base Voltage, VCBO 60VEmitter-Base Voltage, VEBO 5VCollector Current, IC 6ACollector Power Dissipation (TA = +25°C), PD 1.7WCollector Power Dissipation (TC = +50°C), PD 20WOperating Junction Temperature, TJ +150°CStorage Temperature Range, Tstg -55° to +150°CThermal Resistance, Junction-to-Case, RthJC 6.25°C/WThermal Resistance, Junction-to-Ambient, RthJA 73.5°C/W

Electrical Characteristics: (TC = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit

Collector-Base Breakdown Voltage V(BR)CBO IC = 1mA, IE = 0 60 - - VCollector-Emitter Breakdown Voltage V(BR)CEO IC = 10mA, RBE = Infinity 25 - - VEmitter-Base Breakdown Voltage V(BR)EBO IE = 5mA, IC = 0 5 - - VCollector Cutoff Current ICBO VCB = 30V IE = 0 - - 100 ¾AEmitter Cutoff Current IEBO VEB = 4V, IC = 0 - - 100 ¾ADC Forward Current Gain hFE VCE = 12V, IC = 10mA, Note 1 10 50 180 Power Output PO VCC = 12V, Pin = 1W, f = 27MHz 16 18 - WCollector Efficiency 60 70 - %

Note 1. Pulse test: Pulse Width = 150¾s, Duty Cycle = 5%.



TRANZYSTOR ODBIORU


High frequency applications.

The 2SC1674 is a silicon NPN planar epitaxial transistor in a TO-92 type package. This device is suitable for use as FM RF amplifier, Mixer and IF amlifier applications.

ECB

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Collector-Base Voltage, VCBO 30VCollector-Emitter Voltage, VCEO 20VEmitter-Base Voltage, VEBO 4VCollector Current, IC 20mA



Total Device Dissipation (TA = +25°C), PD 250mWOperating Junction Temperature, TJ +125°CStorage Temperature Range, Tstg -55° to +125°C

Electrical Characteristics: (TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max UnitForward Current Transfer Ratio hFE VCE = 6V, IC = 1mA 40 90 180 Current Gain-Bandwidth Product fT IC = 5mA, VCE = 6V, IE 400 600 - MHzPower Gain PG VCE = 6V, IC = 1mA, f = 100MHz 18 22 - dBNoise Figure NF IC = 1mA, VCB = 6V, f = 100MHz - 3 5 dB

TRANZYSTOR W. CZ.




High frequency applications.

The 2SC2814 is a silicon NPN planar epitaxial transistor in a SOT type package. This device is designed for general purpose amplifier applications.

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Collector-Base Voltage, VCBO 30VCollector-Emitter Voltage, VCEO 20VEmitter-Base Voltage, VEBO 5VCollector Current, IC 30mATotal Device Dissipation (TA = +25°C), PD 150mWOperating Junction Temperature, TJ +125°CStorage Temperature Range, Tstg -55° to +125°C

Electrical Characteristics: (TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max UnitForward Current Transfer Ratio hFE VCE = 6V, IC = 1mA 40 - 270 Gain-Bandwidth Product fT IC = 1mA, VCE = 6V, 200 230 - MHzPower Gain PG VCE = 6V, IC = 1mA, f = 100MHz - 25 - dBNoise Figure NF IC = 1mA, VCB = 6V, f = 100MHz - 3 - dB



UK£AD NISKIEJ CZÊSTOTLIWOŒCI

IR3N06 Low Power Narrowband FM IFIR3N06 is similar to MC3361, MC3371, MC3372, MC3357, LM3361, KT3361, KA3361 and

NJM3357

The IR3N06 is a low power narrow band FM detector integrated circuit for FM dual conversion of communication equipment. The IR3N06 includes oscillator, limiting amplifier, AFC circuit, quadrature detect, operational amplifier, squelch circuit, scan-control and muting switch.

Pin Name Description1 Crystal oscillator (10.245MHz)2 Crystal oscillator (10.245MHz)3 Mixer output to Filter (455kHz)4Vcc Positive Supply Voltage5 Limiter input6 Decoupling7 Limiter output8 Quadrature Coil input9 Demodulator output10 IF Filter input11 IF Filter output12 Squelch input13 Scan Control14 Audio Mute15GND Ground16 RF / MF input (10.7MHz)



WZMACNIACZ

LA4485 Power Amlifier

2 x 5 Watt in two-channel mode 15 Watt in BTL mode (Bridge)

Pin Name Description1 CH1 IN Channel 1 input2 CH2 IN Channel 2 input3 SS GND Small-signal ground4 BTL IN BTL-mode feedback input5 BTL OUT BTL-mode feedback output6 FILTER Filter capacitor connection7 LS Vcc Large-signal supply8 SS Vcc Small-signal supply9 STADBY Stanby control input10 MUTE Mute control input11 CH2 OUT Channel 2 output12 LS GND Large-signal ground13 CH! OUT Channel 1 out



SYNTEZA

PLL2002A Serial Input PLL Frequency Synthesizer

The PLL2002A is a serial data programmable PLL Frequency Syntheseizer. Ratios of reference frequency divider and input frequency divider can be independently set.

Pin Name Description1 RI Reference X-tal Oscillator Input2 RO Reference X-tal Oscillator Output3 NC No Connection4 Vcc Positive Supply Voltage - 5 Volt5 PD Phase Detector Output - VCO Voltage Out6 GND Ground7 LD Loop Detector - Loop Detected=HIGH - Not Detected=LOW8 Fin VCO Frequency In9 CL Clock from CPU10 Data Data from CPU11 EN Enable from CPU12 DOA Charge pump output for activ lowpass filter13 NC No Connection14 Test Connect to Vcc15 OV Phase detector output to differential lowpass filter16 OR Phase detector output to differential lowpass filter

Serial Data for PLL2002A



Serial data input timing

Divider data setting procedure

Input data must be MSB first. Final bit (17th bit) is assigned to the control bit. Data are written into shift register at the rising edge of the CLK signal. When LE is HIGH, data is transferred from the shift register to either the latch of reference divider or input divider. Thus data must be written on the shift register while LE is remaining L0W.

While all bits of the N latch to are "0", the N counter will be disabled, DOA, DOP are floating, and the supply current will be decreased. While all bits of the R latch are "0", oscillator will be disabled. While all bits of R and N latches are "0" , supply current decreases to 10uA or less.

PROCESOR

HD404829FS Hitachi MCU



Pins marked with bold is alternativ function for the MCU.

Pin I/O Symbol Function President George1 NUMO Non-user pin. Do not connect it to any lines Not connected2 NUMG Non-user pin. Connect it to GND Not connected3 AVcc Power pin for A/D converter + 5 Volt4 I AN0 Analog input pin for A/D converter Not connected5 I AN1 Analog input pin for A/D converter Meter level input (RF/SWR/S/MOD)6 I AN2 Analog input pin for A/D converter Channel UP/DOWN from Mic.7 I AN3 Analog input pin for A/D converter Not connected8 I AVss Ground pin for A/D converter 0 Volt

9 I TEST Used for factory testing only. Connect this pin to Vcc

10 I OSC 1 Input pin for the internal oscillator circuit11 O OSC 2 Output pin for the internal oscillator circuit12 I RESET Reset the MCU

13 I X1 Used for a 32.768 kHz crystal for clock purposes

Not connected

14 O X2 Used for a 32.768 kHz crystal for clock purposes

Not connected

15 GND Connected to ground 0 Volt16 I/O D0 Input/output pin adressed by individual bits. TX/RX switch in17 I/O D1 Input/output pin adressed by individual bits. Not connected18 I/O D2 Input/output pin adressed by individual bits. Not connected19 I/O D3 Input/output pin adressed by individual bits. Not connected20 I/O D4 Input/output pin adressed by individual bits. Not connected21 I/O D5 Input/output pin adressed by individual bits. Not connected22 I/O D6 Input/output pin adressed by individual bits. Keyboard strobe input23 I/O D7 Input/output pin adressed by individual bits. Keyboard strobe input24 I/O D8 Input/output pin adressed by individual bits. Keyboard strobe input25 I/O D9 Input/output pin adressed by individual bits. Keyboard strobe input26 I D10 Input pin adressed by individual bits. Mode SW: 1=Defalt 0=CEPT

26 I STOPC Input pin for transition from stop mode to active mode

27 I D11 Input pin adressed by individual bits. Stop27 I INT0 Input pin for external interrupts

28 I/O R0-0 Input/output pin adressable by individual bits Mode select: 0=Defalt 1=Allways Internationell

28 I INT1 Input pin for external interrupts29 I/O R0-1 Input/output pin adressable by individual bits Channel UP from rotary knob29 I INT2 Input pin for external interrupts30 I/O R0-2 Input/output pin adressable by individual bits Channel DOWN from rotary knob30 I INT3 Input pin for external interrupts31 I/O R0-3 Input/output pin adressable by individual bits31 I INT4 Input pin for external interrupts32 I/O R1-0 Input/output pin adressable by individual bits BEEP output32 O TOB Timer output pin33 I/O R1-1 Input/output pin adressable by individual bits GREEN lamp



33 O TOC Timer output pin34 I/O R1-2 Input/output pin adressable by individual bits ORANGE lamp34 O TOD Timer output pin35 I/O R1-3 Input/output pin adressable by individual bits Not connected35 I EVNB Event count input pin Not connected36 I/O R2-0 Input/output pin adressable by individual bits Serial data output to EEPROM36 I EVND Event count input pin37 I/O R2-1 Input/output pin adressable by individual bits Serial data input from EEPROM37 I/O SCK Serial interface clock input/output pin38 I/O R2-2 Input/output pin adressable by individual bits Chip select to EEPROM38 I SI Serial interface receive data input pin39 I/O R2-3 Input/output pin adressable by individual bits Clock to EEPROM39 O SO Serial interface transmit data output pin40 I/O R3-0 Input/output pin adressable by individual bits41 I/O R3-1 Input/output pin adressable by individual bits Keyboard strobe output42 I/O R3-2 Input/output pin adressable by individual bits Keyboard strobe output43 I/O R3-3 Input/output pin adressable by individual bits Keyboard strobe output44 I/O R4-0 Input/output pin adressable by individual bits Keyboard strobe output45 I/O R4-1 Input/output pin adressable by individual bits46 I/O R4-2 Input/output pin adressable by individual bits Not connected47 I/O R4-3 Input/output pin adressable by individual bits Not connected48 I/O R5-0 Input/output pin adressable by individual bits Clock to PLL49 I/O R5-1 Input/output pin adressable by individual bits Data to PLL50 I/O R5-2 Input/output pin adressable by individual bits Chip select to PLL51 I/O R5-3 Input/output pin adressable by individual bits TX/RX output to analogboard52 I/O R6-0 Input/output pin adressable by individual bits Sqelsch input53 I/O R6-1 Input/output pin adressable by individual bits POWER switch (ON/OFF)54 I/O R6-2 Input/output pin adressable by individual bits High/Low power output55 I/O R6-3 Input/output pin adressable by individual bits Not connected56 O SEG Segment signal pin for LCD Not connected57 O SEG Segment signal pin for LCD Not connected58 O SEG Segment signal pin for LCD Not connected59 O SEG Segment signal pin for LCD Seg. 160 O SEG Segment signal pin for LCD Seg. 261 O SEG Segment signal pin for LCD Seg. 362 O SEG Segment signal pin for LCD Seg. 463 O SEG Segment signal pin for LCD Seg. 564 O SEG Segment signal pin for LCD Seg. 665 O SEG Segment signal pin for LCD Seg. 766 O SEG Segment signal pin for LCD Seg. 867 O SEG Segment signal pin for LCD Seg. 968 O SEG Segment signal pin for LCD Seg. 1069 O SEG Segment signal pin for LCD Seg. 1170 O SEG Segment signal pin for LCD Seg. 1271 O SEG Segment signal pin for LCD Seg. 1372 O SEG Segment signal pin for LCD Seg. 1473 O SEG Segment signal pin for LCD Seg. 1574 O SEG Segment signal pin for LCD Seg. 16



75 O SEG Segment signal pin for LCD Seg. 1776 O SEG Segment signal pin for LCD Seg. 1877 O SEG Segment signal pin for LCD Seg. 1978 O SEG Segment signal pin for LCD Seg. 2079 O SEG Segment signal pin for LCD Seg. 2180 O SEG Segment signal pin for LCD Seg. 2281 O SEG Segment signal pin for LCD Seg. 2382 O SEG Segment signal pin for LCD Seg. 2483 O SEG Segment signal pin for LCD Seg. 2584 O SEG Segment signal pin for LCD Seg. 2685 O SEG Segment signal pin for LCD Seg. 2786 O SEG Segment signal pin for LCD Seg. 2887 O SEG Segment signal pin for LCD Seg. 2988 O SEG Segment signal pin for LCD Seg. 3089 O SEG Segment signal pin for LCD Seg. 3190 O SEG Segment signal pin for LCD Seg. 3291 O SEG Segment signal pin for LCD Seg. 3392 O COM1 Common signal pin for LCD Com.193 O COM2 Common signal pin for LCD Com. 294 O COM3 Common signal pin for LCD Com. 395 O COM4 Common signal pin for LCD Not connected96 V1 Power pin for LCD driver.97 V2 Power pin for LCD driver. Not connected98 V3 Power pin for LCD driver. Not connected99 Vcc Applies power voltage + 5 Volt100 NUMO Non-user pin. Do not connect it to any lines Not connected

PLL CARIER OSC. - STROJENIEPresident George CB-Radio

ALIGNMENT PROCEDUREPLL CARIER OSCILLATOR PORTION

Test equipment required:

Power Supply: 13,2 V DC Volt Meter Oscilloscope Frequency Counter

Preparation alignment:



Clarifier CenterRF Power ClockwiseVR205 and VR206 CenterRemove PB 201

Step Condition Adjustment Procedure

1 RX AM27.405 MHz

L405 Connect the DC Voltmeter to TP2Adjust for 2.5 +/- 0.1 V

2 RX AM26.965 MHz

Same as Step 1More than 2.0 V

3 TX AM27.205 MHz

L401 Connect oscilloscope to TP1Adjust for 37.900 MHz +/- 20 Hz

4 RX AM27.205 MHz

Check Same as Step 337.900 MHz +/- 20 Hz

5 TX FM27.205 MHz

Check Same as Step 337.900 MHz +/- 20 Hz Reading

6 RX FM27.205 MHz


7 TX USB27.205 MHz

VR211 Connect oscilloscope to TP1Adjust for 37.9025 MHz +/- 20 Hz

8 RX USB27.205 MHz


9 TX LSB27.205 MHz

L402 Connect oscilloscope to TP1Adjust for 37.8975 MHz +/- 20 Hz

10 RX LSB27.205 MHz


11 TX AM27.205 MHz

L406 Connect oscilloscope to TP 3Adjust for10.695 MHz +/- 20 Hz

12 TX FM27.205 MHz


13 TX USB27.205 MHz


14 RX USB27.205 MHz


15 TX LSB27.205 MHz


16 RX LSB27.205 MHz


17 RX FM28.755 MHz

Check Same as Step 1Less than 4.2 V

18 RX USB26.065 MHz

Check Same as Step 1More than 1.2 V



Oscillator-frequency at 27.205MHzVFO OSC- TP1 Adjust X-tal OSC - TP3 Adjust Mod.



37.9000MHz L401 10.6950MHz RX - AM37.9000MHz 10.6950MHz RX - FM37.9025MHz 10.6975MHz L408 RX - USB37.8975MHz L402 10.6925MHz L407 RX - LSB37.9000MHz 10.6950MHz L406 TX - AM37.9000MHz 10.6950MHz TX - FM37.9025MHz VR211 10.6975MHz TX - USB37.8975MHz 10.6925MHz TX - LSB

STROJENIE NADAJNIKAPresident George CB-Radio

ALIGNMENT PROCEDURETRANSMITTER PORTION


Power Supply: 13,2 V DC Current Meter Oscilloscope RF Power meterRF VTVM AF Oscillator FM Linear Detector Dummy Load (50 ohm)AF VTVM


VR208 ClockwiseVR205 and VR 206 Middle positionVR207, VR201, VR202, and VR 203 CounterclockwiseMic gain ClockwiseMeter SW RFSWR/CAL Volume Middle positionRF Power ClockwiseTest frequency 27.185 MHz


1LSB 27.185 MHzNo Mod.

VR203 Remove the PB201Connect a DC current meter to TP202 (+) and TP203 (-) Adjust for 330 mA

2 Same as Step 1 VR201 Connect a DC current meter to TP202 (+) and TP201 (-) Adjust for 85 mA

3 Same as Step 1 VR202 Connect a DC current meter to TP202 (+) and TP201 (-) Adjust for 170 mA



4

LSB 27.185 MHzTwo-Tone400 Hz and 2.500 Hz1 mV Mod.

L221 Re-install the PB201Adjust for maximum on the RF VTVMSet the AF-oscillator, so that the output is less than 32 V

5

LSB 27.185 MHzTwo-Tone400 Hz and 2.500 Hz30 mV Mod.

VR208 Adjust for 25 V on the RF VTVM

6 SSB 27.185 MHzNo Mod.

VR209 Adjust the carrier leakade at LSB and USB become minimum and almost equal

7 AM 27.185 MHzNo Mod.

VR205 Adjust for 3.9 Watt on the WattMeter

8 AM 27.185 MHzNo Mod.

VR204 Adjust for RF Meter at "9" just light on

9 AM 27.185 MHz1 kHz 30 mV Mod.

VR207 Adjust 90% negative

10 AM 27.185 MHz1 kHz 3 mV Mod.

VR213 Adjust for Modulation Meter at "9" just light on

11 FM 27.185 MHzNo Mod.

VR206 Adjust for 3,9 Watt on the WattMeter

12 FM 27.185 MHz1 kHz 30 mV Mod.

VR212 Adjust for +/- 1.9 kHz Deviation



STROJENIE ODBIORNIKAPresident George CB-Radio

ALIGNMENT PROCEDURERECEIVER PORTION


Power Supply: 13,2 V SINAD Meter OscilloscopeAM/FM SSG (AM: 1 kHz 60% Mod.) (FM: 1 kHz 1.2 kHz Deviation)


NB/ANL OffHI CUT OffSQUELCH Counter clockwiseVolume ClockwiseRF Gain ClockwiseClarifier CenterFrequency 27.185 MHz


1 AM60% Mod.

L17 L2 L6 L7 L11 L12 L13

Adjust for maximum reading on the AF VTVM

2 FM1.2 kHz Dev.

L16 Adjust for maximum reading on the AF VTVM

3 AMNo Mod.

VR4 SSG: 40dB (50uV) Adjust "9" just light on

4 AMNo Mod.

VR2 SSG: 66dB (1mV) Just apper AF level

5 USBNo Mod.

L15 and L14 Adjust for maximum reading on the AF VTVM

6 USBNo Mod.

VR3 SSG: 40dB (50uV) Adjust "9" just light on

7 USBNo Mod.

VR1 SSG: 66dB (1 mV) Just apper AF level

8 USBNo Mod.

L1 Connect Oscilloscope to TP4. Set Oscilloscope to DC range and adjust to reach max. reading.

9AM26.065 MHz60% Mod.

Check SSG: 10dBMore than 20 dB SINAD

10AM28.755 MHz60% Mod.

Check SSG: 10dBMore than 20 dB SINAD



Improved receive gainQuieting of AM reception and improving gain of incoming signals is a common request from radio operators. In the first stages of the HF input 2SC1674 (Q8) transistor can be found. This transistor is responsible for the amplification of a small detected signals. A problems exist if the transistor itself is noisy as is such the case of the 2SC1674 when compared to other low noise packages. Along with the amplification of the incoming signals is transistor noise. Replacement of this transistor with a higher gain, lower noise transistor greatly improves the signal to noise ratio of your receiver.

The transistor Q8 operates at VCE= 6Volt and IE= 2,5mA. We will use an 2SC2999 transistor that has higher gain and lower noise characteristic. Replace 2SC1674 (Q8) with 2SC2999 (or similar low noise and high gain transistor) to achieve this improved signal to noise ratio. Re-adjust L2. The gain will improved with more than 6dB with the same signal to noise ratio.

Schemat blokowyPresident Georgie



ANALOG. SCHEMAT P£YTY G£ÓWNEJ



ANALOG. SCHEMAT P£YTY CZO£OWEJ



ANALOG. SCHEMAT ECHA



ROZMIESZCZENIE ELEMENTÓW



president george modyfikacje - dxx.eu · pdf file · 2015-10-03solder 3 wires on...

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