FT-710

Yaesu FT-710 Software Defined Radio circuit configuration emphasizes receiving performance. The rig is equipped with the same high-resolution A/D converter and FPGA used in Yaesu high-end SDR transceivers. The twin Analog-to-Digital converter circuit configuration performs digital conversion processing using two A/D unit. The digital signal is combined by the FPGA to reduce overload and overflow of the A/D converters and improve blocking characteristics. In addition, random noise is added to the analog signal before digital conversion, distortion is suppressed by minimizing the quantization error during conversion by the Analog-to-Digital converter, and a dithering technology that improves intermodulation characteristics is adopted. The overall performance of the SDR receiving circuit is superb.

Yaesu FT-710 receiver block diagram

FT-710 dynamic range :

Powerful RF Front-End and Low Noise Oscillator System enable phenomenal multi-signal receiving characteristics. The Band-Pass filter in the amateur bands as well as the RF amplifier, are excellent in intermodulation characteristics. A low Noise figure is adopted in the front-end section. Additionally, high resolution 250 MHz High Resolution Direct Digital Synthesizer (HRDDS) circuit configuration is used, it is possible to supply a high-quality sampling clock signal with excellent C/N characteristics to the A/D converter. While the FT-710 is compact, it boasts proximity multi-signal characteristics comparable to the high-end transceivers. Also in the transmitter section, excellent C/N characteristics and low noise are thoroughly pursued by the high quality clock signal from HRDDS.

Yaesu FT-710 14 MHz RMDR - Reciprocal Mixing Dynamic Range (left) and BDR - Blocking Dynamic Range (right)

Yaesu FT-710 14 MHz IMDR - 3rd Intermodulation Dynamic Range (left) and TX Phase Noise at 100 Watt (right)

More, two selectable RF stages amplify the desired signals from low band to high band. Preamplifier AMP1, and AMP2 are low noise negative feedback RF amplifiers that may be selected or combined in series as is needed for various low-band, high-band, frequency and noise conditions. In addition, the IPO (Intercept Point Optimization) function maximizes the dynamic range and enhances the close multi-signal and IM characteristics of the receiver. The influence of strong broadcasting stations, especially in the low bands as 80 and 40m, can be minimized.

FT-710 DSP system :

Effective QRM rejection is afforded by high-speed Digital Signal Processing. The Dual core 32-bit high speed floating decimal point DSP (Clock at 594 / 198 MHz) produced by NXP, is used. Yaesu's effective Interference Reduction Systems: SHIFT, WIDTH, NOTCH, CONTOUR, APF, DNR, NB are performed by high-speed digital processing. The interference functions are all accessed from the DSP dial. The filter display shows pass-band AF spectrum information as well as the operation status of the interference reduction functions.

Yaesu FT-710 SHIFT (left) and WIDTH (right) display

Yaesu FT-710 NOTCH (left) and CONTOUR (right) display

In the upper part of the main display, a filter function display presents the state of the pass-band. In addition to the operating state of the interference removal functions, the filter function information is displayed. Not only can you grasp the operating status of Width, Shift, Notch and Contour at a glance, you can also view the status of the RF spectrum in the passband.

The Width feature allows the bandwidth (BW) to be narrowed, while the Shift feature can eliminate interference in one side of the passband. Often, weak signals disappear due to interfering signals. The interfering signals may be extracted, leaving only the desired signal, because of the unique DSP sharp filtering characteristics. More, rather than using the DSP extremely sharp attenuation characteristics, the Contour circuit provides gentle shaping of the DSP passband filter. Thus attenuate or peak bandwidth components in segments. The interfering signal can be naturally shaped without having part of the signal suddenly disrupted. The contour function is very effective in making the desired signal rise out of the interference.

FT-710 AESS system :

AESS (Acoustic Enhancement Speaker System) produces high-fidelity audio using DSP signal processing. The speaker in the top of the Transceiver, and an external side speaker (SP-40 speaker, supplied accessory) are combined to reproduce high-quality received audio with a wide frequency range and a three-dimensional effect that would not be expected from a compact HF transceiver. set the optimum sound quality by adjusting the output balance and frequency characteristics of the two speakers according to your preference.

Yaesu FT-710 with the SP-40 supplied speaker

FT-710 front panel design :

Compact Transceiver, yet a large 4.3-inch (10.9cm) color touch panel display provides intuitive operation and outstanding visibility. Primary operating functions are arranged on the front and centered above the VFO dial for operating efficiency and instant access.

Yaesu FT-710, designed for operating efficiency and comfort

Large size VMI (VFO mode indicator) LED indicators are placed on the left and right of the VFO dial to show the current operating modes at a glance. VMI assists smooth operation and error free tuning. The color of the VMI indicator may be selected from 4 colors (blue, green, red, white) for each operation status.

Yaesu FT-710 VMI indicators, from left: VFO-A, VFO-B, Memory mode, Clarifier/Split operation

The FUNC knob. Simply press the knob to easily select the setting menu, and then change the setting value. A function or setting menu that is used frequently may be assigned, so it can be accessed quickly and the setting made by simply turning the knob.

The QMB (Quick Memory Bank) function can be used to store up to 10 dedicated memory channels. With one touch a memory can easily be recalled. The Quick Memory Bank stores the frequency, the mode, transmit and receive settings, filters and other parameters, so operating may begin quickly in the best condition without re-setting, when switching bands. Memory settings can be easily checked by listing the memory contents on the display.

SD Memory Card slot. Use a commercially available SD Card to record and save the FT-710 settings, the memory contents, recording/playback of received audio, for voice recording for transmission, and screen capture images. The SD Card is also used to update the firmware.

The wide full-color touch panel display, affords intuitive management of operating frequency, meters and main function settings. The real-time spectrum scope display adopts the FTDX series (FT-DX10 and FT-DX101) scope 3DSS to visualize changes in signal strengths within the bands. The 3DSS image uses the horizontal axis (X axis) for frequency, the vertical axis (Y axis) for signal intensity, and the Z axis for time. Compared to the conventional waterfall method, the signal strength is displayed in three dimensions as well as in color, recognition of changes in the band conditions is instant, convenient and intuitive. Scope specifications: sweep speed 30 FPS, range 100 dB, span width 1-1000 kHz.

Yaesu FT-710 high-resolution Display with 3DSS

The Multi function display mode alows the oscilloscope and the AF-FFT audio scope to be shown on the screen, in addition to the RF spectrum scope display. In Multi display, while monitoring the receive band, a simultaneous view of the contact station's transmit signal audio characteristics can be viewed with the AF-FFT function. At the same time the receiver filter and interference reduction functions can be observed on the Multi display for their influence on the received signal.

An external digital video output terminal (DVI-D) is furnished on the rear panel. Directly connect to an external display using a commercially available cable, without need of the LAN connection or other unit. It enables video operation and communication such as projecting the detailed band conditions or filter settings by a High-resolution large screen monitor.

FT-710 FT8 ready :

The multiple settings required for FT8 operation may be set with one touch of PRESET. The Preset item settings can be called and customized by pressing and holding the display button. It is possible to save up to 5 preset parameters.

Yaesu FT-710 Preset setting, the FT8 easy way

FT-710 microphone equalizer :

The Yaesu FT710 includes a unique Three-Band Parametric Microphone Equalizer that provides precise, independent control over the low, mid and treble ranges in the voice waveform. One group of settings may be utilized when the AMC (Automatic Microphone Gain control) or speech processor is Off, and an alternate group of settings when the AMC or Speech Processor is On in SSB mode.

Yaesu FT-710 Parametric Microphone Equalizer range

As parametric equalizer the center frequency of each of the three bands, the amount of enhancement or suppression (gain) within each band, and the bandwidth (Q) over which the equalization is applied may be adjusted.

FT-710 60m band for United States of America:

Memory channels 5-01 through 5-15 are preprogrammed, at the factory - USA version of the FT-710, with the permitted frequencies in the 5 MHz band, and the USB or CW mode is automatically selected on these channels. See table.

The above channels appear after the last PMS channel (M-P9U). Note: all US licensees operating on 60-meter band with emissions of USB voice, 2.8 kHz bandwidth (2K80J3E), should use the dial frequencies indicated on this chart. At no time may any transmission exceed the channel bandwidth of 2.8 kHz.

FT-710 emergency frequency for Alaska:

A station in, or within 92.6 km (50 nautical miles) of, Alaska may transmit emissions SSB on the channel at 5.1675 MHz for emergency communications. The channel must be shared with stations licensed in the Alaska-Private Fixed Service. The transmitter power must not exceed 150 Watt PEP. A station in, or within 92.6 km of, Alaska may transmit communications for tests and training drills necessary to ensure the establishment, operation, and maintenance of emergency communication systems. The FT-710 is capable of transmitting and receiving on 5167.5 kHz under such emergency conditions. Use the Setting Menu to activate the Alaska Emergency Frequency feature:

1. Press the [FUNC] knob.
2. Select [OPERATION SETTING] > [TX GENERAL] > [EMERGENCY FREQ TX].
3. Rotate the [FUNC] knob, or touch "<" or ">" on either side of the value to select "ON".
4. Press the [FUNC] knob, or wait for about 3 seconds to save the setting.
5. Touch [BACK] several times to return to normal operation. Emergency communication on this spot frequency is now possible.
6. Press the [W/M] key, as necessary, to enter the Memory mode.
7. Rotate the [STEP-MCH] knob to select the emergency channel ("EMG"), which is found between channels "5-10" and "M-O1".

The original FT-710 transmit HF frequency range (160-10m Amateur bands) can be widened to 1.8-30 MHz with the MARS/CAP modification. MARS, the Military Auxiliary Radio Service, and CAP, Civil Air Patrol, use HF and VHF frequencies near ham band to forward personal messages to/from military personnel and to/from volunteers in search and rescue activities. The MARS/CAP modification are for those authorized with one or the other organization, and the frequencies are for official use only.

FT-710 rear panel and connections :

Yaesu FT-710 rear panel and connections

FT-710 price

We have collected for your convenience the Yaesu FT710 sale price (US Dollar) and its trend over time. Useful to guarantee a cheaper purchase of this radio and to put it for sale in the second-hand market. Of course offers, accessories, warranty terms and conditions can lead to different figures.

Price	Date	Condition
USD 1299.95	2023-mar	Brand-new
USD 1339.90	2023-mar	Brand-new With MARS/CAP modification
USD 1299.95	2022-sep	Brand-new