TS-440S

ADJUSTMENT

• TX ADJUSTMENT

Measurement

Adjustment

0

Item

1 . TX AMPM

2 . Base Current

Condition

1)FREQ : 14 .1750 MH z

MODE : C W

CAR LEVEL control : MA X

RF unit VR 4: CENER

Disconnect DRV connector from RF unit . Then, connect as shown right .

STBY : SEND

2)Reconnect this connector afte r adjustment .

1) FREQ : 14.1750 MH z

MODE : US B

MIC LEVEI control : MI N

CAR LEVEL control : MI N

FINAL unit VR1, VR2 : MI N Connect Ammete r

Q+ : EXT Power suppl y

e : Power connecto r

Adjust to minimum current with VR 1 and VR2 in the Final unit .

STBY : SEND

Tes t

equipment Unit

Oscilloscope RF

Ammeter

Terminal

Unit Part

 

Method

DRV

RF

VR 5

MA X

T13

,

 

 

 

 

 

 

16,

17

 

 

 

 

 

 

CtSCILLO

 

 

5612

 

 

SCOP E

(1/4W )

Final VR1 Current drai n (Minimum current )

+200 mA

VR2 Current drai n (Minimum current ) +Driver curren t (200 mA)+200 mA

Specification/Remarks

First adjust VR1 and VR2 fo r minimum .

Adjust VR1 for an increase of 200 mA when switched t o TX .

Then adjust VR2 for 200 m A over this reading .

3 .

1) ALC

1) FREQ : 14.1750 MH z

Power meter

Rear panel

 

(RF Outpu t

MODE : CW

 

 

 

power )

CAR LEVEL control : ALC scale MA X

 

 

 

 

STBY : SEND

 

 

 

2) Power

2) METER SW : PW R

 

 

 

meter

STBY : SEND

 

 

4 . Power down

1) FREQ : 29 .7000MHz

Power meter

 

 

 

MODE : CW

 

 

 

 

CAR LEVEL control : ALC scale MAX

 

 

 

 

Connect ACC socket pin (PD) t o

 

 

 

 

50 W from NC .

 

 

 

 

STBY : SEND

 

 

 

 

2) Reconnect this connector (PD )

 

 

 

 

to NC after adjustment .

 

 

5 .

Protection

1) FREQ : 14 .2000MH z

1504 R F

Rear panel

 

 

MODE : CW

dummy loa d

 

 

 

Coax . cable to 1 500 dummy loa d

Power meter

 

 

 

should be 1 m long .

 

 

 

 

STBY : SEND

 

 

2) ANT : OPEN

ANT Filter VR1 95 W

VR6 Set to PWR mete r 95 W readin g

Filter VR3 50 W

AN T Filte r VR2 30W

I

1 m

1 m

TX

Pow .M

504

I

 

I

Caution : In no case shoul d the power be adjusted fo r greater than 110 watts .

±2 .5 W

I //

18A or less

6 . ALC meter

1) FREQ : 14 .2000 MHz

Power meter Rear panel

ANT Filter

VR4

Set to S meter "0"

*If this adjustment is per -

 

MODE : USB

 

 

 

 

formed, step 2) Base current

 

MIC LEVEL control : MIN

 

 

 

 

must also be performed .

 

CAR LEVEL control : MI N

 

 

 

 

 

 

METER SW : ALC

 

 

 

 

 

 

STBY : SEN D

 

 

 

 

 

 

2) Connect the AG to MIC Jack .

Power mete r

 

VR4

Set to ALC mete r

 

 

AG : 1 kHz, 5 m V

A G

Filter

 

starting point .

 

 

STBY : SEND

AF VM

 

 

 

 

 

3) AG : 6 dB increase leve l

 

 

VR5

Adjust for maximu m

 

 

(1 kHz, 10 mV)

 

 

 

ALC scale reading

 

 

 

 

 

 

 

AL C

7 . Spurious

FREQ : 21 .2000 MHz

Power meter

RF

VR4

 

-40 dB or less .

 

MODE SW : C W

Spectru m

 

 

MIN

 

 

CAR LEVEL control : ALC scale MA X

analyzer

 

 

 

 

 

STBY : SEND

 

 

 

 

 

94

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Kenwood AT-440, PS-50, SP-430, PS-430, MB-430, VS-1, YK-88SN, YK-88CN specifications 5612

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.