Introduction
The FT-950 is the latest addition to the esteemed lineage of the FT DX 9000 and FT-2000 series radios. It is designed to meet the needs of both casual and serious DX enthusiasts, as well as new HF licensees exploring the HF and 50 MHz bands. Its triple-conversion super-heterodyne receiver architecture features a 69.450 MHz 1st IF and powerful 1st IF 3 kHz/6 kHz/15 kHz selectable roofing filters (MCF). Enjoy advanced technology with the multi-function 30 kHz 32-bit Floating Point IF DSP. Enhance capabilities with the optional DMU-2000 Data Management Unit for advanced display functions and the optional RF -Tuning Preselector System. The FT-950 offers customization options shared with the FT DX 9000 and FT-2000 Series Transceivers.
The DXer's Choice: FT-950
High-Performance Receiver Design
Inherited from the proud lineage of the FT DX 9000/FT-2000 Series radios, the FT-950 boasts a high-performance receiver.
Triple-conversion Receiver Design with Optimized Stage Balance
The triple-conversion design utilizes a 1st IF of 69.45 MHz, a 2nd IF of 450 kHz, and a 3rd IF of 30 kHz (24 kHz for FM). Advanced filtering at each stage protects subsequent stages from unwanted signal voltage, ensuring a quiet and robust receiver with superior total system performance.
Robust Receiver Front End
The RF amplifier stage is designed for low and high intercept, employing two strong series-connected 2SC3356 bipolar transistors with negative feedback for consistent performance. The low noise figure and controlled stage gains ensure optimal gain utilization. The front panel "IPO" switch allows selection of direct feed to the first mixer (IPO), Preamp 1 (RF AMP1), or Preamp 2 (RF AMP2), enabling adaptation to various antenna and interference conditions. The IPO function optimizes RF stage performance. The first mixer features SPM5001 FETs in an active, doubly-balanced configuration, designed for severe multi-signal environments, resulting in no net gain loss and permitting direct signal feed.
Receiver Block Diagram: Illustrates the signal path from the Antenna Selector through the Front End (ATT, IPO, BPF, RF AMP1/2) to the IF stages (1st IF, Roofing Filter, 2nd IF, CF, 3rd IF DSP) and finally to AGC, DET, and DAC.
Factory Installed 1st IF Roofing Filters
The 69.450 MHz first IF stage includes three roofing filters (15 kHz, 6 kHz, and 3 kHz), automatically selected by mode for optimal performance on crowded bands. These four-pole, fundamental-mode monolithic crystal filters provide excellent shape factor and significantly improve the 3rd-Order Intercept Point performance.
3 kHz Roofing Filter Performance: A graph displays the filter's frequency response, showing its sharp cutoff characteristics.
High-speed Direct Digital Synthesizer (DDS) & Digital PLL
An ultra-low-noise local oscillator system provides a clean first IF signal, enhancing the receiver's strong-signal handling capabilities, spurious-free dynamic range, and close-in blocking performance through a high Carrier-to-Noise (C/N) ratio.
Local Design Block Diagram: Depicts the local oscillator system components including VCO, TCXO, DDS, and PLL.
Advanced Digital Signal Processing (DSP)
The FT-950 features a legendary Yaesu 32-bit floating point IF DSP (TI TMS320C6713) for superior performance.
Variable IF WIDTH and IF SHIFT
The IF WIDTH control adjusts the passband bandwidth, allowing reduction to as little as 500 Hz (CW/RTTY/PKT) or expansion to 3 kHz (SSB). The IF SHIFT control varies the center frequency of the passband to eliminate interference outside the desired signal range. The NAR function offers further passband reduction. These systems work together to provide effective interference reduction.
IF WIDTH and IF SHIFT Selectivity: A table details the selectivity ranges for different modes (CW/RTTY/PKT, SSB, AM, FM).
IF WIDTH/SHIFT Diagrams: Visual representations show how IF WIDTH alters the passband's overall width and how IF SHIFT moves its center frequency.
CONTOUR Control
The CONTOUR control allows shaping the receiver passband by adjusting low-frequency or high-frequency components, or nulling mid-range interference, thereby improving fidelity and signal-to-noise ratio.
CONTOUR Filter Conceptual Diagram: Illustrates the concept of shaping the audio passband.
Manual IF Notch and Digital Notch Filter (DNF)
The manual IF Notch filter offers deep notching (over 70 dB). The digital NOTCH function (DNF) provides automatic reduction of multiple carriers within the passband.
IF NOTCH Performance: A graph demonstrates the deep attenuation provided by the IF Notch filter.
DSP Digital Noise Reduction
Utilizes a powerful Digital Noise Reduction filter with fifteen noise analysis parameters to effectively reduce random noise under various conditions.
Digital Noise Reduction Performance: A graph shows the filter's effect on signal output versus frequency.
Analog-sounding High-quality Digital SSB Modulation
Provides an analog-sounding SSB modulation envelope with adjustable transmission bandwidth.
Optional Accessories
RF -Tuning Ultra Sharp Preselector System
This optional system enhances performance on lower bands by providing an ultra-sharp preselection. It features a high-torque stepper motor, synchro belt drive, and is available in modules (MTU-160, MTU-80/40, MTU-30/20). It offers high Q (>300) and increases the 3rd-order Intercept Point (IP3) by 4 dB.
RF µ-Tune Circuit Diagrams: Schematics show module connections and the internal functional diagram of the µ-Tune unit.
External Data Management Unit (DMU-2000)
The DMU-2000 enhances DX operation with advanced display capabilities, mirroring those of the FT DX 9000 and FT-2000 series. It requires an aftermarket PC display and keyboard (not supplied).
Key DMU-2000 features include:
- Spectrum Scope with LBWS: Displays RF spectrum activity with adjustable span and increased sweep speed via Limited Band Width Sweep (LBWS). Offers Spectrum Scope or Band Monitor functions.
- Audio Scope/Oscilloscope Display: Analyzes audio spectrum and X-Y characteristics.
- World Clock Display: Shows global times, sunrise/sunset lines, and includes an alarm.
- Swept-Frequency SWR Display: Plots SWR across frequencies during transmission.
- Rotator Control Function: Manages Yaesu antenna rotators with a Great Circle Map interface.
- Memory Channel List: Allows editing and tagging of memory channels.
- Log Book Feature: On-board logging with export options (ADIF, Cabrillo).
DMU-2000 Unit Image: Shows the external appearance of the DMU-2000.
Spectrum Scope Display: A screenshot of the RF spectrum analyzer.
Waterfall Display: Visualizes signal activity over time.
Swept-Frequency SWR Display: Graph of SWR across frequencies.
Operational Features for Enhanced Experience
Superb Viewing and Display Clarity
The proprietary High-visibility Fluorescent Display (VFD) offers superior brightness, contrast, and viewing angles.
Bar Graph S/PO Meter
Provides accurate readings for S and PO, with selectable displays for Speech Compression Level, ALC Level, SWR, Final Amplifier Voltage, and Final Amplifier Current.
S/PO Meter Display: Shows the bar graph interface for meter readings.
Unique "Block Diagram" Display
Instantly shows the status of critical receiver functions and DSP filter settings at a glance.
Block Diagram Display: Illustrates the receiver's system status.
Independent Analog Clarifier Display
Facilitates easy operation of split frequencies, displaying the offset numerically and graphically.
Quick Split Function
Engages split operation by separating receive and transmit frequencies by 5 kHz with a single button press.
TXW (Transmit Frequency Watch) Function
Allows listening on the transmit frequency during split operation to monitor activity.
IF Noise Blanker
Effective against automotive ignition noise, with adjustable gain via the MENU mode.
Flywheel-effect Main Tuning Dial
A large, 2.67" (58 mm) brass tuning knob with a precision magnetic rotary encoder provides smooth, accurate frequency control. Torque is adjustable.
Interference-reduction Controls
Key controls like IF SHIFT, IF WIDTH, CONTOUR, and NOTCH are conveniently grouped on the front panel for quick access.
Multi-function Dial
Controls VFO-B functions (tuning, band change) and supports VFO-A operations.
CW Capabilities
CW Zero-in Feature: Aids precise tuning with a sidetone pitch matching and a visual tuning indicator.
CW Spot Feature: Provides a spotting tone to match the transmitted signal's offset for accurate frequency placement.
Additional CW Capabilities: Includes separate KEY jacks, built-in Electronic Keyer (4-60 WPM), keyer weight control, dot-dash reversal, bug emulation, full break-in, 5-channel message memory, automatic contest number insertion, beacon mode, adjustable VOX delay, mode reversal, and CW keying during SSB.
CW Tuning Indicator: Visually depicts the tuning process for CW operation.
"My Bands" Feature
Allows users to skip specific amateur bands for increased operating efficiency, excluding bands like WARC.
"My Bands" Menu: Shows the band selection interface for customization.
CS Key (Custom Selection)
Provides one-touch access to frequently used menu items.
Other DX Enthusiast Features
Includes Quick Memory Bank (QMB), 5-channel voice memory (DVS-6), FH-2 Keypad support, VOX, MOX, All-mode Squelch, CTCSS, Repeater Shift, PL Tone Encoder, Wide/Narrow modes, LOCK function, flexible VFO/Memory commands, versatile scanning, Menu Mode, rear-panel audio recording jack, RS-232C CAT protocol, Rotator Control function, support for RTTY, SSTV, PSK31, JT65, VL-1000 Linear Amplifier, general coverage reception (30 kHz - 60 MHz), optimized AGC decay, versatile memory system (99 channels, 5 groups), and a 4-position receiver front-end attenuator.
Rotator Controller Display: Interface for controlling antenna rotators.
Super-Clean Transmitter Design
Ultra-stable and High-power Final Amplifier Stage
Features a reliable RD100HHF1 MOS FET in a push-pull configuration, powered by 13.8V and cooled by a large 1400 cc die-cast aluminum heat sink with a thermostatically-controlled 4-speed fan for efficient and quiet operation.
Parametric Microphone Equalizer
Allows adjustment of center frequency, bandwidth, and amplitude for low, mid, and high audio bands, enabling users to tailor transmit audio quality to their preference.
Parametric Microphone Equalizer Graph: Illustrates gain/loss adjustments across frequency bands.
High Speed Automatic Antenna Tuner
Offers 100 memories for matching-point data, ensuring efficient and fast antenna tuning across bands.
Renowned YAESU Speech Processor
Enhances speech intelligibility and punch for contest or DX pile-up operations by tailoring frequency response and adjusting compression levels.
Transmit Monitor Feature
Allows listening to the transmitter's IF signal for precise adjustments to the Parametric Equalizer, SSB Bandwidth, and Speech Processor.
Rear Panel Connections
The rear panel provides comprehensive connectivity:
- ANT 1/2 Jacks: For antenna connections.
- DC IN: For 13.8V DC power input (22A recommended).
- -TUNE Jacks (RF): For connecting RF -Tuning kits.
- LINEAR: For controlling the optional VL-1000 Linear Amplifier.
- TUNER: For controlling the optional FC-40 Automatic Antenna Tuner.
- RTTY/PKT: Connections for RTTY terminal units or external Packet TNCs.
- PTT: For manual transmitter activation.
- REC: Audio output for recording.
- EXT SPKR: For external speaker connection (4-8 Ohms).
- KEY: For connecting a CW key or keyer paddle.
- REM (REMOTE): For connecting the optional FH-2 Keypad for message storage and remote control functions.
- DMU: For the optional DMU-2000 Data Management Unit.
- CAT: DB-9 serial port for external PC control (RS-232C).
- PGM SW: For connecting an external switch.
Rear Panel Layout: An illustration labels all input/output jacks on the rear of the FT-950.
Top View & Bottom View: Images show the internal layout of the transceiver's components.
Supplied Accessories: MH-31B8 Hand Microphone, DC Cable.
Specifications
| General | Receiver | ||||
|---|---|---|---|---|---|
| Rx Frequency Range | 30 kHz - 56 MHz (operating) | Circuit Type | Triple-conversion Superheterodyne | ||
| Tx Frequency Ranges | 160 - 6 m (specified performance, Amateur bands only) | Intermediate Frequencies | 69.450 MHz/450 kHz/30 kHz (24 kHz for AM/FM) | ||
| Frequency Stability | 0.5 ppm (after 1 minute @77 F [+25 C]) 1.0 ppm (after 1 minute @14 F ~ +122 F [10 C ~ +50 C]) | Sensitivity | SSB (BW: 2.4 kHz, 10 dB S+N/N) 4 V (0.5 - 1.8 MHz) (IPO "ON") 0.2 V (1.8 - 30 MHz) (AMP 2) 0.125 V (50 - 54 MHz) (AMP 2) AM (BW: 6 kHz, 10 dB S+N/N, 30 % modulation @400 Hz) 28 V (0.5 - 1.8 MHz) (IPO "ON") 2 V (1.8 - 30 MHz) (AMP 2) 1 V (50 - 54 MHz) (AMP 2) FM (BW: 15 kHz, 12 dB SINAD) 0.5 V (28 - 30 MHz) (AMP 2) 0.35 V (50 - 54 MHz) (AMP 2) There is no specification for frequency ranges not listed. | ||
| Operating Temperature Range | 14 F ~ +122 F (10 C ~ +50 C) | Squelch Sensitivity (RF AMP 2 "ON") | SSB/CW/AM 2 V (0.1 - 1.8 MHz) 2 V (50 - 54 MHz) FM 1 V (28 - 30 MHz) 1 V (50 - 54 MHz) There is no specification for frequency ranges not listed. | ||
| Emission Modes | A1A (CW), A3E (AM), J3E (LSB, USB), F3E (FM), F1B (RTTY), F1D (PACKET), F2D (PACKET) | Selectivity (WIDTH: Center) | Mode CW/RTTY/PKT SSB AM FM | 6 dB 0.5 kHz or better 2.4 kHz or better 6 kHz or better 15 kHz or better | -60 dB 750 Hz or less 3.6 kHz or less 15 kHz or less 25 kHz or less |
| Frequency Steps | 1/10 Hz (SSB, CW, & AM), 100 Hz (FM) | Image Rejection | 70 dB or better (160 - 10m Amateur bands) 60 dB or better (6m Amateur band) | ||
| Antenna Impedance | 50 Ohms, unbalanced | Maximum Audio Output | 2.5 W into 4 Ohms with 10% THD | ||
| Power Consumption (Approx.) | 16.7 - 150 Ohms, unbalanced (Tuner ON, 160 - 6 m Amateur bands, TX only) Rx (no signal) 1.8 A Rx (signal present) 2.1 A Tx (100 W) 22 A | Audio Output Impedance | 4 to 8 Ohms (4 Ohms: nominal) | ||
| Supply Voltage | DC 13.8 V 10% (Negative Ground) | Conducted Radiation | Less than 4000 W | ||
| Dimensions (WxHxD) | 14.4" x 4.5" x 12.4" (365 x 115 x 315 mm) | ||||
| Weight (Approx.) | 21.6 lbs (9.8 kg) | ||||
| Transmitter | |||||
| Power Output | 5 - 100 watts (2 - 25 watts AM carrier) | ||||
| Modulation Types | J3E (SSB): Balanced, A3E (AM): Low-Level (Early Stage), F3E (FM): Variable Reactance | ||||
| Maximum FM Deviation | 5.0 kHz / 2.5 kHz | ||||
| Harmonic Radiation | Better than 60 dB (160 - 10m Amateur bands: Harmonics) Better than 50 dB (160 - 10m Amateur bands: Others) Better than 65 dB (6m Amateur band) | ||||
| SSB Carrier Suppression | At least 60 dB below peak output | ||||
| Undesired Sideband Suppression | At least 60 dB below peak output | ||||
| 3rd-order IMD | 31 dB @14 MHz 100 watts PEP | ||||
| Bandwidth | 3 kHz (LSB/USB), 500 Hz (CW), 6 kHz (AM), 16 kHz (FM) | ||||
| Audio Response (SSB) | Not more than 6 dB from 300 to 2700 Hz | ||||
| Microphone Impedance | 600 Ohms (200 to 10 kOhms) |
DMU-2000 Data Management Unit Specifications
| Parameter | Value |
|---|---|
| Power Requirements | AC 90 V ~ 264 V 50/60 Hz |
| Current Consumption (@117V AC) | Typ. 50 VA |
| Weight (approx.) | 5.9 lbs (2.7 kg) |
| Dimensions (WxHxD) | 3.9" x 5.3" x 13.8" (100 x 135 x 350 mm) (without knobs/switches) |
Specifications are subject to change, in the interest of technical improvement, without notice or obligation, and are guaranteed only within the amateur bands.
Options and Accessories
Included: MH-31B8 Hand Microphone, DC Cable.
Optional Accessories:
- DMU-2000: Data Management Unit (includes Scope Unit, CF Card Unit). Requires aftermarket PS/2 Keyboard and PC monitor.
- DVS-6: Voice Memory Unit.
- FH-2: Remote Control Keypad.
- MD-200A8X: Desktop Deluxe Dynamic Microphone.
- MD-100A8X: Desktop Microphone.
- YH-77STA: Stereo Headphones.
- VL-1000: HF - 50 MHz 1 kW Linear Amplifier (50 MHz: 500 W/USA Version) with VL-1000 Power Supply VP-1000.
- Automatic Antenna Tuner Built In: (Model not specified for this unit).
- FC-40: Automatic Antenna Tuner for long wire antennas.
- RF -Tune Kits: Available in 160m Band (A), 80/40m Band (B), 30/20m Band (C). Up to three kits can be installed.
