14 INSTALLING OPTIONS

5Orient the VS-2 unit with the large IC (IC1) facing down, then install this unit on the two threaded posts using the 2 screws.

6Re-install Cover A (7 screws).

7Replace the bottom case and re-install its screws (12 screws).

Note:

For more information, refer to the Instruction Manual provided with the VS-2 unit.

The supplied screws and cushion are not used. Keep them for future use.

SO-2 TEMPERATURE-COMPENSATED CRYSTAL OSCILLATOR (TCXO)

CAUTION: Switch OFF the power and unplug the DC power cable before beginning installation.

EQUIPMENT REQUIRED:

Large Phillips screwdriver

Small Phillips screwdriver

Pencil soldering iron (25 W)

1Remove the top case (10 screws).

2Unplug the speaker cable from the 2-pin connector CN404. Remove the speaker-bracket screws

(4 screws), then lift out the entire speaker assembly.

Speaker-bracket screws

CN404

Speaker assembly

3Remove the remaining screws (6 screws) from Cover B.

Cover B

4Unplug CN407 (wired to the AT connector on the Rear Panel) from the circuit board. Lift up Cover B, and remove the small SO-2 board from the compartment below.

Cover B

SO-2 board

5Insert the SO-2 unit into the SO-2 board. Solder the five pins on the unit to the board.

SO-2 unit

 

-2

O

S

 

SO-2 board

6Slide the small switch on the SO-2 board in the direction of the “SO-2” arrow.

-2 SO

Note: This switch must be positioned correctly for the SO-2 unit to function.

7Re-install the SO-2 board in the transceiver in the same location from which it was removed.

8Re-position Cover B, install only 6 screws, and replace CN407 that was unplugged in Step 4.

9Re-position the speaker-bracket assembly, install its screws (4 screws), and plug the speaker cable into CN404.

10Replace the top case and re-install its screws (10 screws).

Note: For more information, refer to the Instruction Manual provided with the SO-2 unit.

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Kenwood TS-870S instruction manual Installing Options, SO-2 TEMPERATURE-COMPENSATED Crystal Oscillator Tcxo

TS-870S specifications

The Kenwood TS-870S is a distinguished transceiver that stands out in the world of amateur radio, particularly for enthusiasts who seek a blend of advanced technology and user-friendly features. Introduced in the early 1990s, this HF transceiver quickly gained a reputation for its exceptional performance, versatility, and reliability, making it a favorite among operators worldwide.

One of the most noteworthy features of the TS-870S is its direct-sampling technology, which allows for superior signal fidelity and processing. This technology enables the transceiver to operate across a range of 160 meters to 10 meters, catering to both casual and serious operators. Its high-performance 16-bit digital signal processing (DSP) facilitates effective noise reduction and filtering capabilities, enhancing the overall clarity during transmission and reception.

In terms of power, the TS-870S boasts an output of 100 watts, providing ample power for various communication needs. The transceiver is equipped with an automatic antenna tuner, which simplifies the task of matching the antenna to the operating frequency, ensuring optimal performance without the hassle of manual adjustments.

Another significant aspect of the Kenwood TS-870S is its user interface, featuring a large, easy-to-read display, and a logically arranged control layout. This makes it accessible for both novice and experienced operators. The built-in memories allow for quick storage and access to favorite frequencies and settings, enhancing operational efficiency.

The Kenwood TS-870S also includes various advanced features such as an optional 2.4 kHz and 6 kHz roofing filter which provides improved performance in crowded band conditions. The receiver's dual VFOs (Variable Frequency Oscillators) enable simultaneous monitoring of two frequencies, which is particularly useful for operators who need to keep track of multiple signals or engage in cross-band communication.

Apart from its technical specifications, the TS-870S is constructed with durability in mind, ensuring that it can withstand the rigors of frequent use. It supports various operating modes, including SSB, CW, AM, and FM, making it a versatile choice for diverse amateur radio activities.

In conclusion, the Kenwood TS-870S combines advanced technology with user-friendly characteristics, offering amateur radio operators an exceptional tool for communication. With its innovative features, robust performance, and flexibility, it continues to be a respected choice among radio enthusiasts, solidifying its legacy in the realm of amateur radio.