MMI Technical Resource
   Updated 24 April 2003 Yaesu Vertex FTH-2070 Technical   

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    Technical
  • VX-5R
  • FT-2600M
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  • FTH-2070
  • CTCSS Explained
  • DCS Explained
  • Emission Types
  • Technical Terms

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  • General
  • Number of Channels: 32 Channels (VHF and UHF Shared)
  • Frequency Ranges:
        150-170MHz, 450-470MHz (Prior to lot 3) Or
        134-174MHz, 400-500MHz (Lot 3 and later)
  • Channel Steps: 5kHz (VHF) and 12.5kHz (UHF)
  • Power Supply Voltage: 12VDC
  • Current Consumption:
        Standby (Saver On): 38mA
        Standby (Saver Off): 60mA
        Receive: 180mA
        Transmit (Low): 600mA (VHF) and 700mA (UHF)
        Transmit (Hi): 1200mA (VHF) and 1600mA (UHF)
  • Battery Life w/FNB-16 (5-5-90 duty): 8.1hrs. (VHF) and 7.0hrs. (UHF)
  • Operating Ambient Temperature Range: -22F to +140F (-30C to +60C)
  • Operating Ambient Humidity (Max.): 95% @ +50C
  • Frequency Stability: 5ppm
  • RF Input-Output Impedance: 50Ω
  • Audio Output Impedance: 8Ω
  • Dimensions: 7.8" x 2.6" x 1.7" (200 x 66 x 43 mm)
  • Weight: 29oz. (820g) w/FNB-16

    Receiver
  • Circuit Type: Double-Conversion Superheterodyne
  • Intermediate Frequencies: 45MHz and 455kHz
  • Sensitivity: 0.25µV (VHF) and 0.35µV (UHF) For 12dB SINAD
  • Adjacent Channel Selectivity: 70dB
  • Intermodulation: 70dB (VHF) and 75dB (UHF)
  • Spurious and Image Rejection: 70dB
  • Conducted Spurious Emissions: 50dBm
  • Audio Response: +3/-8dB From The 6dB/Oct. De-emphasis Curve
  • Audio Output: 500mW Into 4Ω w/<5% THD
  • Hum and Noise: 45dB

    Transmitter
  • RF Power Output: 5/1W (Both Bands)
  • Modulation: 16K0F3E
  • Maximum Deviation: ±5kHz
  • Conducted Spurious Emissions: >60dBc
  • FM Hum and Noise: 47dB
  • Audio Response: +1/-3dB From The 6dB/Oct. Pre-emphasis Curve
  • Audio Distortion: <5%
  • Power Amplifier Modules: M57796H (VHF) and M57797H (UHF)

    Features
  • 5 Watts Power Output
  • Built-In CTCSS Encoder/Decoder
  • Programmable VFO Steps: 5kHz (VHF) and 12.5kHz (UHF) Steps
  • 32 Memories with 4-Character Alpha/Numeric Labels
  • Invertible LCD Display
  • TX Time-Out Timer (TOT)
  • TX Time-Out Resume Timer
  • Busy Carrier Lock-Out and Busy Tone Lock-Out
  • PC Programmable
  • Versatile Scanning Features Including Priority Scan
  • FCC Type Accepted for Marine Use
  • Aluminum Diecast Chassis
  • MIL-STD 810C/D/E

    Accessories
  • FTT-5: DTMF Keypad
  • FDS-1: DCS/DPL Encoder/Decoder
  • FTE-11: Tone Burst Encoder
  • CD-11: Rapid Vehicular Charger
  • FMA-2070: Mobile Charger/Amplifier
  • FNB-15: 12V 600mAh, Ni-Cd Battery Pack
  • FNB-16: 12V 1200mAh, Ni-Cd Battery Pack
  • FNB-16IS: 12V 1200mAh, Ni-Cd Intrinsically Safe Battery For Use w/IS Radio
  • FSU-1083: Voice Inversion Encryption
  • FSU-460: High Security Rolling Code Encryption
  • F2D-4: Two-Tone Sequential Decoder (Tone Groups 1, 2, 3)
  • F2D-4B: Two-Tone Sequential Decoder (Tone Groups 4, 5, 6)
  • MH-20A12C: Speaker Microphone
  • NC-35: Desktop Rapid Charger
  • NC-36: 6-Unit Multi-Charger
  • LCC-2070A: Leather Case
  • LCS-2: Belt Swivel Attachment For LCC-2070A
  • VPL-1D: Radio to Computer Programming Cable w/Software
  • VPL-2070: Programming Adapter Cable

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    Serial Numbers
    For all Yaesu/Vertex radios that I've seen, the serial numbers are in the format of YPXXXXXX where "Y" is the production year, "P" is the production run and "XXXXXX" is the radio's unique number.

    Accessory Connector Pinout
    Pin 1 is the de-emphasized and amplified audio normally going to the speaker. When the accessory plug is connected, this pin will be pushed in, disconnecting the radio's internal speaker. The audio will then be routed out this connector. When the vehicular adapter is used, 12V is placed on pin 9, disconnecting the radio's antenna, via relay, and creating a path to the accessory connector (pin 4) for connection to an external antenna provided by the mobile charger/amplifier.

    Disassembling Instructions
    Disassembling this radio can be very confusing if you don't know exactly where to start and what to do. Here are step by step instructions on how to take this radio apart.
    1. Take antenna off and take nut off connector.
    2. Pull knobs off volume and channel selector.
    3. On the bottom side of the radio, unscrew the two screws that are closest to the rear of the case.
    4. Use a 1.5mm allen wrench to unscrew the six screws holding the front panel on.
    5. Unscrew the seven screws that were behind the front panel.
    6. Unscrew the two screws on top of the radio (behind the LCD, knobs, etc.).
    7. Pull straight up on the top panel.
    8. Gently pull the two halves of the radio apart and watch for ribbon cable and wires.
    9. Disconnect the ribbon cable on rear half of the radio since it is the easiest side to put back together.

    VCO Alignment
    Use the graphic below for VCO alignment. To check TX VCV press PTT while measuring voltage on the "TX" test point. Use a dummy load on the antenna port during these tests.
    FTH-2070 VCO Diagram

    Step Test Point Frequency Voltage Trim Cap
    1 RX 170MHz 4.0V TC2
    2 RX 150MHz 1.2V TC2
    3 RX 470MHz 4.0V TC1
    4 RX 450MHz 2.0V TC1
    5 TX 170MHz 3.5V TC4
    6 TX 150MHz 2.5V TC4
    7 TX 470MHz 3.5V TC3
    8 TX 450MHz 2.5V TC3

    CTCSS Tone Chart
    You'll need this tone chart when time comes to program your radio.
    Tone #   Tone #   Tone #   Tone #
    67.0 64 97.4 59 136.5 25 192.8 20
    71.9 32 100.0 14 141.3 09 203.5 04
    74.4 63 103.5 29 146.2 24 210.7 19
    77.0 16 107.2 13 151.4 08 218.1 03
    79.7 62 110.9 28 156.7 23 225.7 18
    82.5 31 114.8 12 162.2 07 233.6 02
    85.4 61 118.8 27 167.9 22 241.8 17
    88.5 15 123.0 11 173.8 06 250.3 01
    91.5 60 127.3 26 179.9 21 None 49
    94.8 30 131.8 10 186.2 05    

    CTCSS Squelch Tail Elimination
    The FTH-2070 uses the MX-Com MX365 CTCSS Encode/Decode IC. Even though it can generate a reverse burst, it does not recognize this method of squelch tail elimination on receive. It does, however, recognize another means of squelch tail elimination on transmitters that turn the PL off a few hundred milliseconds before transmitter drop-out.

    Cloning
    Cloning the FTH-2070 can be accomplished by, first, enabling clone mode. This is done by holding down [PRI] while powering on the radio. "TXRX" will then flash in the display. While the radios are connected via the cloning cable (part number unknown) press [MON/R] on the RX radio and then [C/M] on the TX radio. "TX" and "RX" will be shown respectively. When the radios are done cloning "TXRX" will flash again.
    Remember:
    1. Connect radios with cloning cable
    2. Power radios on with [PRI] depressed
    3. Press [MON/R] on RX radio
    4. Press [C/M] on TX radio
    © 2003 MMI Technical Resource
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