Kenwood TS870D Base Transceiver with DSP

Used in excellent condition, overhauled and guaranteed for 12 months

EXCHANGES ARE ACCEPTED, EVEN MULTIPLE

Features in summary:

Operation in amateur band from 160m to 10m

100kHz~30MHz general coverage receiver

Latest generation DSP (Digital Signal Processing) at IF stage

DSP filters and noise reduction

Voice Processor

Computer control at 57.6 Kbps

K1 LogiKey integrated

Built-in automatic antenna tuner

SE Auto Notch

Hit Cancel

Variable AGC circuit

Output power 100W

AIP System

Double antenna terminals

Programmable function keys

TS-870S in detail:

Next-generation digital signal processing

DSP technology uses a dedicated chip to convert analog waveforms into digital information in “real time,” providing the opportunity to filter and improve the quality of the signal before it is converted back to analog format for the human ear or for radio frequency transmission.

The design approach we took with the TS-870S utilizes DSP in the IF stage, enabling the widest range of control and unprecedented receiver performance. This next-generation DSP is powered by two 24-bit, 20 MIPS (million instructions per second) DSP chips with a dynamic range of 144 dB, allowing you to detect weak signals you’ve never heard before, apply customized enhancements to your transmitted voice, and achieve significant noise reduction.

Digital filter

The key innovation that sets the TS-870S apart from any other transceiver on the market is the IF stage, the next-generation digital signal processor. By capturing the signal at the IF frequencies and applying complex algorithms based on the setup parameters, it achieves filtering that is simply not possible with an analog circuit. For example, in SSB, CW, and FSK modes, you can tune the DSP filter sharply enough to achieve over 100 dB of out-of-band attenuation with virtually no signal loss. And there’s no need to purchase additional filters—it’s all done with DSP.

SSB mode

When operating in SSB mode, the digital IF filter enables both high and low cutoff frequency variance, so it can be used as a slope tune, cutting out noise with minimal effect on sound quality. The high cutoff variance is adjustable in 12 steps between 1.4 and 6.0 kHz, while the low cutoff variance is divided into 10 segments between 0 and 1000 Hz.

CW Mode

The Variable Bandwidth Tuning (VBT) function is complemented by the center frequency shift, which allows to exclude the interference of the adjacent signal. The VBT provides 6 tuning steps between 50 and 1000 Hz and the center frequency shift can be adjusted in 13 steps between 400 and 1000 Hz.

FM mode

In FM mode the VBT function works as a 6-step variable bandwidth between 5 and 14 kHz.

AM mode

Independent control of the high and low cutoff frequencies also gives you the ability to slope tune in AM. In addition, the high cutoff frequency can reduce interference by controlling the IF passband width, useful for receiving shortwave broadcasts. The high cutoff frequency is adjusted in 6 steps between 2.5 and 7 kHz, while the low cutoff frequency can be set to 0, 100, 200 or 500 Hz.

FSK mode

Similar to FM mode, VBT function offers FSK noise reduction capabilities with 4 stages available: 250, 500, 1000 and 1500 Hz.

DSP Detection

Through DSP processing in the detector circuit, the TS-870S provides a significantly better S/N ratio than a comparable analog circuit. This results in lower distortion and higher quality detection in all modes, far surpassing previous non-DSP designs.

Noise reduction

The TS-870S offers 2 noise reduction methods to give you an edge when receiving weak signals: the Line Enhancer (LEM) method and the Speech Processing/Auto Correlation (SPAC) function.

LEM allows you to custom shape a filter curve around a target signal, essentially “sculpting” it out of the noise floor – a powerful tool in SSB operation.

SPAC uses a special statistical/correlation algorithm to extract weak signals from the noise, ideal for difficult CW conditions.

The features of the LEM and SPAC functions are fully configurable via the TS-870S menu interface.

Beat Cancel

The Beat Cancel function automatically detects and eliminates multiple beats that interfere with a desired signal. It works in all modes except CW.

IF Auto Notch

The IF Auto-Notch function provides extremely clean notch filtering of carrier frequencies from broadcast and continuous beat sources. Because it handles the signal in digital form in the IF stage, interfering beat can be "cut off" much more precisely than is possible in conventional analog systems. Auto-Notch will also follow changes in the beat signal, so you can "set it and forget it." Works in all modes except CW and FSK.

Variable AGC circuit

The AGC circuit is modeled after a time-based continuously variable design for maximum convenience. The digital format offers very fast release characteristics, surpassing even the best analog designs. You can select automatic or manual mode and a custom release time for each mode.

Vocal Equalizer

You can apply equalization to the transmitted audio in AM and SSB modes by changing the bandpass filter width and low cutoff frequency, giving you control over the tonal qualities of your voice. The bandpass filter has 5 steps between 1.8 and 3.0 kHz, and the low cutoff frequency is adjustable in 6 steps from 0 to 500 Hz. The transmit filter has an attenuation factor of 100 dB.

Voice Processor

The voice processor is divided into three audio frequency bands: low, medium and high. They are all fully adjustable via the menu interface.

Transmission Equalizer

You can further customize the broadcast audio by adding clarity (high boost), strength (low boost), and removing background noise other than your voice (comb filter). This allows you to optimize the signal for specific contacts.

The rear panel is equipped with several connectors: antenna 1 and 2 (UHF type), FSK modulation (RCA/phono jack), high-speed RS-232C PC control (9-pin D-SUB), digital modes (13-pin DIN), external antenna tuner (6-pin), external linear amplifier control (7-pin DIN), dual CW keys, external speaker (miniplug), station monitor connector (8.83 MHz; RCA/phono jack), and external receiver antenna connection (RCA/phono jack).

Smooth operation

The TS-870S has a full range of additional features that make HF operation a truly enjoyable experience. All the boredom is eliminated, leaving you free to pilot your way through DX contests, DX expeditions, or whatever your HF passion is. The TS-870S provides you with cutting-edge digital technology plus all the convenience these features bring.

Integrated electronic keyer

Fly high with Morse code generated by the fully integrated electronic keyer. It is based on the popular K1 LogiKey and offers full or partial break-in, DSP-adjustable rise/fall times, as well as a sidetone monitor. The TS-870S also features a second keyer connection.

CW pitch control

The CW pitch control is adjustable in 50 Hz steps between 400 Hz and 1000 Hz. It can also be linked to the sidetone.

CW Reverse Mode

In reverse mode, the interfering tone competing with the CW signal is reversed, so the operator can approach the target from either side.

100 watt output

The TS-870S delivers 100 watts in SSB, CW, FSK and FM modes. AM output is 25 watts.

Advanced Intercept Point (AIP)

AIP extends the receiver's dynamic range and reduces adjacent signal interference. AIP can be activated and stored on each band.

Multiple scanning modes

All-Scan mode covers all memory channels that have information stored in them; Group Scan mode scans all 100 memory channels in groups of 10; Locked Memory Scan allows you to sample only certain channels; and Program Scan is used to scan a frequency spread between two VFO settings. You can control the speed of any scan mode and choose either time- or carrier-based busy-stop-resume.

Menu Function

The full power of the DSP and other functions are accessible via the menu-based display interface on the front of the TS-870S. You can also activate the Quick Menu function to access only the most commonly used functions.

Automatic antenna tuner

The sophisticated automatic antenna tuner operates in all bands from 1.8 to 28 MHz with quick tuning lock when using presets. It also operates when the radio is in receive mode, maximizing the strength of received signals.

Double antenna terminals

You can connect two separate antennas at the same time and switch between them using the front panel controls. The antenna selection is saved in band memory for automatic recall when changing bands.

Receiving antenna

You can also connect an external receiver to a dedicated connector to access other frequencies on the same antenna used by the TS-870S.

Digital Recording Unit Option

The optional DRU-3 is a high-quality digital recording device that can store up to 4 messages for a total of 60 seconds.

TF-Set

Transmit Frequency Set allows one-touch control of the transmit frequency when using splits. You can lock the receive frequency and also adjust the transmit frequency.

"Delta" Frequency

This feature provides an instant display of the frequency difference between transmit and receive when using splits.

Quick memory

Uses one-touch quick memory to store temporary frequencies "on the fly" (5 channels). It is ideal for use during contests or in variable conditions.

100 channels of main memory

You have more than enough space to store frequency, mode and other settings for your favorite operating hangouts. You can also set a channel for use as a programmable VFO or programmable scan.

AGC Transmission

The microphone's AGC circuit ensures that the transmitted signal is not overmodulated, even if the voice input level varies (SSB, FM, AM).

Attenuator

You can select 4 attenuation levels for each band: off, -6 dB, -12 dB and -18 dB.

Noise Blanker

The Noise Blanker is a type of variable level filter that cancels out impulse-type interference.

Programmable function keys

You can program your most frequently used functions to any of the 4 user-programmable keys for quick access.

High-speed computer control interface

The TS-870S is fully controllable from your computer via a built-in 57.6Kbps high-speed RS-232C interface on the rear panel.

Other features:

General coverage receiver (100 Hz to 30 MHz)

RIT/XIT (variable range: ±9.99 kHz)

Compatible with speech synthesizer (with optional VS-2)

Squelch in all modes

RF Gain

Split transfer function

VOX

Frequency lock/transmission inhibit

Variable acoustic signal (3 levels)

Dimensions (W x H x D)

Dimensions: 330 x 120 x 334 mm (12.99 x 4.72 x 13.15 inches)

Please note that not all features and options may be available for the model sold in your region.

DTSS, Pager, DTMF and CTCSS operation is subject to local regulations.