Kenwood AT-440, PS-50 ~ t, Fig Mode control circuit, Control unit X53-1450, Expand function, Off

Page 24

TS-440S

CIRCUIT DESCRIPTION

14 . Mode control signals

Transmit/receive mode signals are generated by ICI 0 in the IF unit . IC 10 is a hybrid IC containing five pairs of PNP tran- sistors and diodes .

Figure 22 shows its equivalent circuit . When the mode sig- nals SSB, CWB, RYB, AMB, and FMB are applied to pins 6

t

4 F

~ t

Q Q

LL LL

to 10, the voltages of control pins 16 and 17 change . Dur- ing reception, these signals change to SSR, CWR, RYR, AMR , and FMR . During transmission, these signals change to SST , CWT, RYT, AMT, and FMT .

2 H

3

C> V

3

BX6124

L

Fig . 22 Mode control circuit

15 . Expand function

Control unit (X53-1450- 11

D No .

 

Shipped

 

Diode cu t

65

Mode beep tone

Morse

Single ton e

66

10Hz display

OFF

O N

67

Memory protect

OFF

O N

73

CW shift

 

800Hz

400H z

78

W 24

TX

No

Ye s

79

W 18

TX

No

Yes

Table 14 Expand function

I

24

Page 23 Page 25
Image 24
Page 23 Page 25
Contents KEN Wood Semiconductors Dimensions TS-440SSensitivity Image ratio If rejection SelectivityFrequency accuracy RIT/XIT OFF Frequency stabilityFig Frequency configuratio n Circuit Descriptio N IpllFig Receiver circuit configuratio n USB, LSB, FS KAM, FM Displayed frequencie sCircuit Description Fig Selectivity control circuitFilter selective MCF L71-0259-05 RF Unit FlCeramic filter L72-0355-05 if Unit CF2 Circuit Descriptio N BX7I91- 851BX719 D27 D2 Fig Notch circui tTransmitter Circuit Descriptio n TS-440$ Fig Antenna tuner circuit SWR protection circuitSWR automatic arithmetic circuit Fig -2 FULL/SEMI BREAK-IN timing chart Fig -1 FULL/SEMI BREAK-IN block diagra mControlsemi Circuit Description Fig -3 FULL/SEMI BREAK-IN timing char tFig Standby keying timing char t Circuit Descriptio N Fig PLL circuit block diagra m PLL4 PLL3Circuit Descriptio N Unloc kCircuit Description Fig Control circuit block diagra mFig Encoder waveform timing chart Fig Encoder circui tFig Digital circuit Key scan matrix%--- 1 9 L Fig A/D convertor circui tRIT If Shift Reset output 7800 port B7 RL output 7800 port A6BZ Buzzer output 7800 port A7 MT output 8255 IC2 port A7Band information 7800 PBo 3, B3B2B1B o VCO SW VCOFig Band information generation circuit BCD DECFig Mode control circuit ~ tControl unit X53-1450 Expand functionOperation procedure BZ OFFTES T Conditio nSW Monitor Display changes by Test numbe r SN74LS138H Control unit IC51 Reset Rese T SE T DAT a ClockTOP View MB4052 Pin Descriptio n Signal Pin Function s AD CCLK DataBPD SN74LSI38Semiconducto R Semiconducto R Pin connectio nNF B TPD8255AC-5 Control unit IC2 Semiconducto R SCKParts List Chip capacitorsFor U .S .A M2 General Marke TFor Europ e For Australi a Warranty Card DC Power Cord ASS YWire with Conneltnr Fuse 20AACCESSNR YRef . No Address Parts No Description DestiRP. * -g Nation 40HFR MAfN PnnhSwitch Unit PIN Connectnr Ceramic CC45RHIH330J CeramicCeram IC Cerom CElectr CE04W Odium Elec CROCE04WIH010M Electro CE04IAIHO Elec .1ROAddress New Parts No Descriptio n Desti Natio nCnnnect I NG Wire CC45CF-II.HO50C CeramicCeramic Ooopf Elec -FRO OUFAddress New Parts No Description Desti- Re nation mark sAddress New Parts No IR .g Desti NationRef . No Parts No Descriptio nDesti Re nation mark s New Parts Ceramic 56OPFCK45FIH223Z Ceramic Screw PUL LEYRAN Hfad Machine SCR K W Prone R5004`-,0111-1220 Cioo Ceramic 6BPFCeramic 1OPF CC45CHI.F-IOR5C Ceramic0107 Small Fixed Inducto R L40EIOII-13 Small Fixed Inducto RSmall Fjxed Inducto R Oscillating LOILVCO395MH7Desti Re nation marks CST LOU Trmming POT 50V Protectio NMimng POI RelayElellrn 47LIF EleltpnOoiuf Ceramic Hinf112 AT Unit TS-440S G5 a It ,4-$ Ceramic Oiouf CK45FIH223Z CeramicCC45SLIHO50C Ceramic CK45FIIJ223Z CeramicCO92M1H1O3K CE04WIH010MCE04W1HR47M CE04W H4RIMSig 1F F TS-440$ DTC114ES Digital Transistor PC Board TS-440S BDFNilY 016 C36PW M Tl .I J PLL Unit Page Page Page Page Page Page Page Page Disassembly Disassembly Sems55x2 OcDC o TS-440E/8 000- N TS-440S Packing Adjustmen T RECAdjustment Spectrum Analyzer SPE-ANAJapanese SG American SG 25µ Detector Power on DC V .M RF Gain MAX Mode USB Stby RECMode USB Mode a MUnit Adjustmen T 5612 Mode F M DI PANT AN T VR6Stby SEN D Power SW OFF Mode SWMode USB Function SW aTOP View TP3 TP4IITP8I TP11I ITP1 Adjustment MV AF 25mV 4.9mV AF Output 0 .68V/811Input DBu 44 FMIf Unit MIC MI CRF UNI T TIF DRV=KO= Power SW of F Power SW onPS-50 Warranty AP B AL Power for DAC Power ORD AF Power CordWire HAN D Power IronsinrmerPower Cord Pushing NotRS14GB3A01DJ RI1JZF1OD FL---PROOF RSSchematic Diagramipc Boar D 220V Version 240V VersionSpecificationsiparts LIS T SLP144BRS14GB3D4R7J CE04W1HR22M CS15E1EO10M CS15E1VOR1MMN6401TRA IC N IC N ICSchematic Diagram Languag E SelectPage Weight MB-430/SP-430YK-88S/SN,YK-88C/C N Ratin gCommunications & Test Equipment Grou P Incorporated in N .S
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Manual 4 pages 53.32 Kb

SP-430, VS-1, PS-430, AT-440, YK-88C specifications

The Kenwood MB-430, PS-50, YK-88S, YK-88CN, and YK-88SN are notable components that enhance the capabilities of Kenwood's transceiver products, particularly in the amateur radio segment. Each of these units plays an essential role in expanding functionality, improving performance, and providing users with valuable features that are beneficial in various communication scenarios.

Starting with the Kenwood MB-430, it serves as a versatile mobile bracket designed for specific Kenwood radio models. The MB-430 enhances mobility, allowing operators to mount their radios securely in vehicles or portable setups. Its sturdy construction ensures reliability during operation, and it offers a simple installation process, making it user-friendly for both beginners and seasoned enthusiasts.

The PS-50 power supply is a crucial accessory that complements Kenwood's transceiver line. This power supply is known for its compact design, providing 13.8 V DC output, which is essential for powering radios effectively. With a current rating that adequately supports various transceivers, the PS-50 is equipped with short-circuit protection and thermal overload features. These safety mechanisms protect both the power supply and the connected equipment, making it a dependable choice amongst operators.

The YK-88S, YK-88CN, and YK-88SN are all filters that enhance the performance of Kenwood transceivers. The YK-88S is a high-performance SSB filter, designed to improve the clarity of SSB signals while reducing adjacent channel interference. It offers narrow bandwidth options that facilitate more precise tuning, making it particularly valuable in crowded band conditions.

Meanwhile, the YK-88CN is known for its crystal filter technology, optimizing the transceiver's performance for CW and digital modes. This filter helps in eliminating unwanted noise, allowing operators to enjoy clearer reception and improved decoding of weak signals.

The YK-88SN, similar in function to the YK-88S and YK-88CN, provides additional narrow filtering options, enhancing the agility of transceiver operation in various modes. It effectively enhances selectivity and reduces interference from strong signals, providing a cleaner audio output.

Together, these components contribute to a seamless operating experience for amateur radio enthusiasts. Whether enhancing filter characteristics, providing reliable power, or ensuring secure mobility, the MB-430, PS-50, YK-88S, YK-88CN, and YK-88SN demonstrate Kenwood’s commitment to quality and performance in the radio communications field.
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