6.4ADJUSTMENT OF TRANSMITTER SECTION

A D J U S T M E N T O F T R A N S M I T DRIVE COIL (COIL PACK UNIT)

The drive coil is built in the coil pack unit. Set the SG switch on the rear panel to OFF and the DRIVE knob t o its center position. Then. set the METER switch to ALC and the MODE switch to CW or TUN position.

With the standby switch in the SEND position, adjust the drive coils for maximum ALC deflection for each band using the same frequency as for the adjustment of ANT and MIX coils.

During the adjustment. turn the CAR knob just enough t o swing the meter (ALC). This adjustment can be started with any band.

ADJUSTMENT OF T R A N S M I T IF COIL (IF A N D RF UNITS)

Using any frequency. set the transceiver in transmit mode at CW or TUN position. Adjust T5 of the IF unit and T1 of the RF unit until the meter IALC) indicates maximum deflection.

CARRIER BALANCE ADJUSTMENT (IF UNIT1

(See Fig. 31)

With a dummy load connected to the ANT terminals. adjust for the maximum output using 14.175 MHz frequency. Set the transceiver in LSB mode and turn the RF VOLT knob.on the rear panel for maximum sensitivity. The pointer of the RF meter will deflect if the carrier is unbalanced. In this case, be sure to turn the MIC knob to the minimum position. To balance the carrier. adjust the trimmer TC1 and the semi- fixed resistor VR2 alternately until the meter pointer in- dicates a minimum position. Change the mode to USB and if the pointer deflects. then readjust so that the pointer deflects the same amount for both LSB and USE.

NEUTRALIZING THE FINAL STAGE

Adjust the drive and final stages completely using 21.3 MHz. with a dummy load connected.

Set the SG switch to OFF and measure the output at the ANT terminals (shorted with dummy load) with a high sensi- tivity RF voltmeter or a tester having a rectifying diode such as 1N60. Then turn the nuetralizing variable capacitor lTC1 viewed through the adjusting hole in the upper panel of the final box) for minimum output. Normally. i t is unnecessary to remove the shielding case for this adjustment, but be sure to use a insulated screwdriver. Use of a non-insulated screwdriver will result in incorrect adjustment and also cause electric shocks.

ADJUSTMENT OF SIDE TONE LEVEL (AF-AVR UNIT) Adjust VR3 to your desired level.

ADJUSTMENT OF MONITOR LEVEL (IF UNIT) Adjust VR4 to your desired level.

Fig. 3 1 Counter Frquency Calibration

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Image 39
Kenwood TS-820 manual Adjustment of Transmitter Section, Adjustment of T R a N S M I T if Coil if a N D RF Units
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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.
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