11 OPERATOR CONVENIENCES

DRU-3 DIGITAL RECORDING SYSTEM (OPTIONAL)

The DRU-3 DRS unit allows you to record approximately 15 seconds of audio per channel on up to 4 channels. The audio is input via your transceiver microphone. Once recorded, the audio can then be transmitted. It is also possible to make longer messages by consecutively sending the contents of message memories. Finally, you can even send this longer linked message repeatedly by using the Repeat function accessible via Menu No. 39 (REPEAT).

The DRU-3 is useful in many situations:

¥DX chasing or contest operation where repeated calls are necessary for extended periods of time

¥Checking interference complaints to other equipment (lets you be in two places at one time)

¥Checking or adjusting your transmit signal or your antennas if itÕs not convenient to be sitting in front of your microphone

¥Helping a friend adjust his antenna or receiver when he needs repeated test transmissions from you

Once you begin using the unit, youÕll likely discover other applications.

RECORDING MESSAGES

To record a message, you must select the same mode for transmit and receive. The selected mode must be SSB, FM, or AM.

Note:

Pressing the [] (POWER) switch while recording or playing back messages may cause previously recorded messages or recordings in progress to be erased.

Refer to “INTERNAL ADJUSTMENTS” {page 70} for information on adjusting the recording level.

1Switch OFF the VOX function by pressing [VOX].

2Press [REC] to activate the Record Standby mode.

¥ ÒAP - appears.

AGC AUTO

USB

¥Press [CLR] to exit from the Record Standby mode and to abort recording your message. This does not erase any previously recorded messages.

3Press and hold down [CH 1], or [CH 2], or [CH 3], or [CH 4] and begin speaking into your microphone.

¥There are four memories for recording messages. Press the button that corresponds to the message memory that you want to use.

4Release the button pressed in Step 3 when you have finished recording your message.

¥Recording continues until you release the key or the maximum recording time passes (about

15 seconds) whichever occurs first.

Note: To erase a message, use the above recording procedure without speaking into the microphone (or disconnect your microphone) while recording.

MESSAGE PLAYBACK

This section explains how to play back the contents of a single message memory. Whether checking or actually transmitting messages, press [CLR] any time you want to cancel playback. Also, you cannot change the transceiver frequency while playing back messages.

Note: Pressing the [] (POWER) switch while recording or playing back messages may cause previously recorded messages or recordings in progress to be erased.

Checking Messages

Use this procedure to verify the contents of a message memory.

1 Switch OFF the VOX function by pressing [VOX].

2 Select SSB, FM, or AM mode by pressing [LSB/USB] or [FM/AM].

¥The transmit and receive modes must be the same.

3Press [CH 1], or [CH 2], or [CH 3], or [CH 4] to play back the message in the respective memory.

¥For example, ÒAP 1 - - - - - appears while Message #1 is playing back.

Transmitting Messages (VOX)

Use this procedure to transmit the contents of a message memory.

1 Switch ON the VOX function by pressing [VOX].

VOX

AGC AUTO

USB

2Select SSB, FM, or AM mode by pressing [LSB/USB] or [FM/AM].

¥The transmit and receive modes must be the same.

3Press [CH 1], or [CH 2], or [CH 3], or [CH 4] to play back the message in the respective memory.

¥After the message is transmitted, the transceiver automatically returns to the receive mode.

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Kenwood TS-870S DRU-3 Digital Recording System Optional, Recording Messages, Message Playback, Checking Messages

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.