-

1

*

6.3 ADJUSTMENT OF RECEIVER SECTION

ADJUSTMENT OF 9V AVR VOLTAGE (AF-AVR UNITI

Adjust VR4 for 9V between the terminal "9" and chassis.

ADJUSTMENT OF A G C B I A S (AF - AVR UNIT)

Adlust VR1 for 3 3V between the term~nal"RF1' and the

chass~s

RIT ADJUSTMENT (AF - AVR UNITI

Set the RIT knob to its center position and turn on the RIT switch. Rotate the main tuning knob until the marker signal can be heard in suitable beat tone. Then. adjust VR2 so that the beat tone is not varied regardless of the position of the RIT switch.

M A R K E R FREQUENCY C A L I B R A T I O N ( M A R K E R U N I T I

The marker frequency is factory adjusted prior t o shipment. However, if it is deviated after a long period of use of the set. it must be calibrated accurately. TS-820 is designed to re- ceive WWV signals so that the marker frequency can be cali- brated prectsely.

Set the BAND switch on the front to WWV and turn the main tuning knob until i t is aligned with the "0" on the sub dial. A standard 1 5 MHz W W V beat signal will be received. By setting the FUNCTION switch to CAL-25 kHz, this beat signal is superposed on the marker beat signal and is heard as a double beat signal. Adjust the ceramic, trimmer TC1 un- til a zero beat is obtained. The marker frequency is now fully calibrated.

COUNTER FREQUENCY CALIBRATION (COUNTER UNIT, OPTION)

With the FUNCTION switch in the VFO position. turn the BAND switch to receive 15 MHz W W V standard signal. By connecting the counter calibration cable suppled to the counter unit and the X VERTER IN jack on the rear panel. the WWV beat signal is superposed on the higher harmonics of the standard signal of the counter and is heard as a double beat signal. Adjust the trimmer of the counter unit to obtain a zero beat. By so doing, the frequency indicated on the di- gital display is accurately calibrated. After the calibration. disconnect the counter calibration cable.

A D J U S T M E N T OF A N T A N D M I X COILS (COIL PACK UNIT)

The ANT coil and MIX coil are included in the coil oack unit.

Set the FUNCTION switch to CAL-25 kHz t o receive a marker signal. Make- certain thattheANTterminalsareshorted

ted with a 5 0 7551 resistor. With the DRIVE knob set to its center position. adjust the ANT and MIX coils for maxi- mum deflection of the S meter. using the frequency table gi- ven below. In adjustment, start with the 1 8 MHz band and then proceed to other bands. To adjust the 10m band, use only 29.0 MHz in the 29 . 0 MHz band.

I 21

Adjustment 1

1

 

I

DRIVE coil /

Freouencv

ANT Coil

MIX Coil

 

1.8

1

1.90

M H Z

L8 1

L2

1

L15

1

3

.5

 

3

. 75

MHz

LlO,

 

L16

 

7

 

 

7

. 15

MHz

L1 1

 

L17

 

1 4

 

14.175

MHz

L12

L5

 

L18

 

2 1

 

I

21.225

M H z

L13

L6

 

L19

 

29

. 0

 

29

.00

MHz

L14

 

 

 

 

W W V

 

15 . 00

MHz

L9

L 1

 

 

 

ADJUSTMENT OF RECEIVE IF COIL (RF A N D IF UNITS1

Receive 2 5 kHz marker signal using any frequency. Adjust the DRIVE knob and the main tuning khob for maximum def- lection of the S meter. Then adjust T2 of the RF unit and T4. T5 and T7 of the IF unit until the S meter indicates maxi- mum deflection. Do not touch T I . T2. T3 and 1 6 .

S METER A D J U S T M E N T (IF UNITI

Disconnect the antenna and set the transceiver in receive mode. The zero-point adjustment of the S meter can now be acomplished in the following manner:

Adjust V R l so that the meter pointer indicates its minimum position. If a standard signal generator (SSG) is available. adjust VR2 until the S meter indicates "9". using 14.175 MHz 4 0 dB signal (reading on SSG)

Page 37 Page 39
Page 38
Image 38
Kenwood TS-820 manual Adjustment of Receiver Section
Page 37 Page 39

TS-820 specifications

The Kenwood TS-820 is a high-performance amateur radio transceiver known for its exceptional features and technologies that cater to both novice and experienced operators. This rig, part of Kenwood's renowned TS series, has become a popular choice for those seeking reliability and versatility in their communication equipment.

One of the defining characteristics of the TS-820 is its dual-conversion superheterodyne receiver architecture. This design minimizes interference and provides improved performance across various amateur radio bands. With coverage from 160 meters to 10 meters, the TS-820 is capable of operating on all major HF amateur bands, making it an excellent choice for diverse communication purposes.

In terms of power, the TS-820 delivers a solid output of 100 watts, ensuring that operators can make their presence known across the airwaves. The rig features a built-in automatic antenna tuner, which simplifies the setup process by matching the transmitter to various antenna types. This feature not only enhances signal clarity but also maximizes the station's efficiency.

Another standout feature of the TS-820 is its extensive digital signal processing (DSP) capabilities. The advanced filtering options help to eliminate noise and interference, allowing users to hear weaker signals more clearly and effectively. The IF filter selections can be adjusted to optimize reception under varying conditions, showcasing the rig's adaptability.

The user interface of the TS-820 is designed for both ease of use and functionality. The large, backlit display provides critical information at a glance, while the rotary controls offer tactile feedback, allowing operators to make precise adjustments quickly. Additionally, the rig supports various modes of operation, including SSB, CW, and RTTY, accommodating a wide range of communication preferences.

Built with durability in mind, the TS-820 utilizes high-quality components and construction techniques that ensure long-term reliability. Its rugged design can withstand the rigors of everyday use, making it a trustworthy companion for any amateur radio enthusiast.

In summary, the Kenwood TS-820 is a versatile and reliable amateur radio transceiver that stands out due to its superior performance, advanced technologies, and user-friendly features. With its robust design and comprehensive capabilities, the TS-820 continues to earn its place as a respected choice among ham radio operators around the world. Whether engaged in casual conversation or competitive contesting, enthusiasts can rely on the TS-820 for a satisfying and immersive amateur radio experience.
Top Page Image Contents