Tektronix 3A75 4-MHz Amplifier (1969)

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Tektronix Catalog CostLow BidHigh Bidaverage
$195 (1969)
$285 (1973)
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  • Bandwidth : 4 MHz
  • Risetime : 90 ns
  • Sensitivity : 50 mV/div to 20 V/div
  • Input Impedance : 1 MΩ 47 pF


    The Type 3A75 is a general purpose plug-in unit for use in the Type 561B, 564B or 565 Oscilloscope. It can also be used in the Type 568 Oscilloscope when digital readout is not required. Used in the Type 129 Power Supply, it can drive recorders, X-Y ploters, oscilloscopes, and other indicators.

    BANDWIDTH
    DC to 4 MHz at 3-dB down. AC-coupled low-frequency response is 2 Hz, 0,2 Hz with 10X probe.

    RISETIME
    Approximately 90 ns

    DEFLECTION FACTOR
    50 mV/div to 20 V/div in 9 calibrated steps, 1-2-5 sequence; accurate within 3%. Uncalibrated, continuously variable between steps and to approx. 50 V/div.

    INPUT RC
    1 megohm paralleled by approx. 47 pF.

    MAXIMUM INPUT VOLTAGE
    600 V combined DC + peak AC.

    WEIGHTS
    Net wieght4lb1.8 kg
    Domestic shipping weight≈7 lb≈3.2 kg
    Export-packed weight≈12 lb≈5.4 kg


    RECOMMENDED PROBES
    P6028 - 1X
    P6006 - 10X
    P6007 - 100X

    (excerpt from Tektronix® Products 1973)

    It is complete with all tubes (2 ea. 6DJ8, 2 ea. 6197, 2 ea. 12BY7, and 1 ea. 12AT7).