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DACT Phono Stage RIAA Preamp CT-100

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    Purchase DACT Phono Stage RIAA Preamp CT-100

    SKU: DACT-CT100-Phono-Stage DACT Phono Stage RIAA Preamp CT-100

    $1,695.00 each - special order
    Brand: DACT
    Quantity in Basket:  None

     

     



    CT-100 Phono Amplifier

    Description

    The CT100 is a two-channel phono preamplifier module with a very accurate RIAA equalisation and many features. It is constructed with the best semiconductors available and non-inductive, low noise, SMD metal film resistors. The circuit is designed to accept both moving coil (MC) and moving magnet (MM) transducers / cartridges directly in order to eliminate the need for an external MC step-up transformer or amplifier. MC or MM input loading and input nominal level values are easy to select with high accuracy using DIP-switches.

    The DACT CT100 is ideal for the most demanding applications requiring accurate RIAA equalisation, very low noise, extremely low distortion and superior sonic performance. The CT100 is a pre-assembled PCB ready for building into an enclosure or even better into your turntable (shorter signal cables). The high output voltage from the CT100 gives it an equivalent output to other signal sources like CD-players.

    Features

    • Compact design. Dual-mono. Very low noise.
    • Balanced output option.
    • Non-inductive low noise SMD metal film resistors.
    • Input accepts moving coil or moving magnet (MC or MM) cartridges directly without step-up transformer.
    • Input loading 10 Ohm to 47 kOhm for MC or MM selectable in 21 steps.
    • Input nominal levels 0.1 mV to 10 mV selectable in 34 steps.
    • High output drive. Balanced: 28V. Unbalanced: 14V.
    • High accuracy RIAA equalisation with 0.05 dB tolerance.
    • Additional time constants of 3.18 uS and / or 7950 uS are selectable.
    • Total harmonic distortion 0.0003%.
    • Low output impedance - drives long signal cables.
    • High output current capability - drives even high impedance headphones.
    • Two-stage dual-supply voltage regulator onboard for each channel. Separate DC supply input for each channel (dual mono).
    • High-end matching power supply CT102 available.

    Typical Applications

    • High performance RIAA pre-amplifier for MC and MM cartridges.
    • High performance RIAA headphone amplifier.
    • Upgrading Hi-fi equipment.
    • Reference RIAA pre-amplifier.
    • Test equipment RIAA pre-amplifier.

    Downloads

    Adobe AcrobatDownload DACT CT100 Datasheet (290 KB)

    Adobe AcrobatDownload DACT CT100 Instruction Manual (234 KB)

    PDF files use Adobe Acrobat® Reader®, which is available here if required.

    Block Diagram

    DACT CT100 block diagram. One channel shown.

    Dimensions and Outline

    DACT CT100 dimensions and outline.
    DACT CT100 dimensions.

    Specifications

    Maximum Ratings

    Note

    Symbol; Parameter

    (Conditions/Comments)

    Value

    Unit

    1

    VS, supply voltage

     

    ±50

    V

    1

    VIN, input voltage

    (AV = 40dB to 80dB)

    ±1

    V

    1

    TS, storage temp. range

     

    -40 to +85

    deg. C

     

    Operating Ratings

    Note

    Symbol; Parameter

    (Conditions/Comments)

    Value

    Unit

    2

    VS, supply voltage range

     

    ±9 to ±35

    V

    2

    TA, ambient temp. range

     

    -25 to +70

    deg. C

     

    DC Electrical Characteristics
     (Typical values at TA = +25 deg.C and RL = 1k unless otherwise specified.

    Note

    Symbol; Parameter

    (Conditions/Comments)

    Value

    Unit

     

    RIN, input resistance

    (DIP-switch selectable)

    10,15,18,20,25,30, 40,50,60,70,80,90, 100,150,180,200, 250,400,600,1k,47k

    Ohm

     

    CIN, input capacitance

    (DIP-switch selectable)

    Approx. 100,200,300,400

    pF

    3

    IB, input bias current

    (Input bias current cancellation pre-adjusted)

    Max. 0.5

    uA

    4

    PSRR, power supply rejection ratio

    (AV = 40dB, 10Hz to 20kHz)

    120

    dB

     

    RO, output resistance

    (VO = 1V, DC to 100kHz)

    0.1

    Ohm

     

    VO, output voltage swing

    (Unbalanced operation)

    Min. 14.2

    V

     

    IO, output current

    (RL = 100 Ohm)

    25

    mA

     

    IS, supply current

    (Each channel)

    22

    mA

     

    AC Electrical Characteristics
     (Typical values at TA = +25 deg.C and RL = 1k unless otherwise specified.)

    Note

    Symbol; Parameter

    (Conditions/Comments)

    Value

    Unit

     

     VIN, input nominal levels

    (VO = 1V)
    (DIP-switch selectable)
     (0.10mV ~ AV = 80dB)
     (1.0mV ~ AV = 60dB)
     (10mV ~ AV = 40dB)

    0.10, 0.12, 0.15, 0.18, 0.20, 0.25, 0.30, 0.40, 0.45, 0.50, 0.55, 0.60, 0.70, 0.80, 0.90, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.8, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 7.0, 8.0, 9.0, 10.0

    mV

     

    VINO, input overload level

    (f = 1kHz, AV = 40dB)

    100

    mV

     

    AV, voltage gain

    (DIP-switch selectable)

    40 to 80

    dB

    4,5

    dAV, RIAA equalisation deviation

    (Ref.= 1kHz, 10Hz to 20kHz)

    0.05

    dB

     

    BW, bandwidth

    (-3dB, VO = 1V, AV = 40dB)

    2

    MHz

    4

    en, input noise voltage density

    (f0 = 1kHz, AV = 80dB)

    0.5

    nV/Hz

    4,6

    S/N, signal to noise ratio

    (AV = 40/60/80dB)

    98/90/71

    dB

    4

    CS, channel separation

    (AV = 40dB, 10Hz to 20kHz)

    120

    dB

    4

    THD, total harmonic distortion

    (AV = 40dB, f0 = 1kHz)

    0.0003

    %

    Notes

    1. Exposure to maximum rating conditions for extended periods of time may affect device reliability.
    2. Operating ratings indicate conditions for which other device parameters may not apply.
    3. At power up and power down the value may be maximum 5 uA for less than one second.
    4. Measured with Panasonic Audio Analyser VP-7722P.
    5. RIAA time constants are 75 uS, 318 uS and 3180 uS Additional time constants of 3.18 uS and 7950 uS are DIP-switch selectable.
    6. Input short-circuited. Reference: 1V. Response: RMS. Weighting: IHF-A.

    PCB

    DACT CT100 PCB solder-side.
    DACT CT100 PCB solder-side.

    Review

    Adobe Acrobat Click here for a review by The Audiophile Club of Greece. (221KB) Note: Outside link.
    PDF files use Adobe Acrobat® Reader®, which is available here if required.

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