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The Tektronix 475 is a portable dual-trace oscilloscope with dual time-bases similar to the 465, but with 200 MHz bandwidth and a maximum vertical sensitivity of 2 mV/Div. It is all solid-state except for the CRT. It was introduced in November 1972.
A revised version, the 475A, has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div. The 1106 is a battery pack for the 475.
The optional DM44 multimeter attaches to the top of the instrument.
|Bandwidth||200 MHz (475), AC cutoff 10 Hz, switchable BW limit 20 MHz|
|Rise time||1.75 ns (475)|
|Deflection||2 mV/Div to 5 V/Div, 1-2-5|
|Cascaded mode||400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT|
|Time base||10 ns/Div to 500 ms/Div, 1-2-5, and ×10 magnifier|
|Input impedance||1 MΩ // 20 pF|
|Triggering||0.3 Div (int) or 50 mV (ext) to 40 MHz, increasing to 1.5 Div/250 mV at 200 MHz; AC coupling >60 Hz; LF REJ >50 kHz, HF REJ <50 kHz|
|X bandwidth||3 MHz|
|Z axis input||5 Vp-p, 50 MHz|
|Calibrator||1 kHz, 30 mA / 300 mV square wave|
|Outputs||CH2 Vert Signal Out, 20 mV/Div into 1 MΩ or 10 mV/Div into 50 Ω; A and B +GATE OUT, +5 V; Probe power jack|
|CRT||8 × 10 cm², P31 phosphor (P11 opt.)|
|Power||110, 115, 120, 220, 230 or 240 VAC ±10%, 48-440 Hz, max. 100 W|
The 475 uses a number of Tek-made integrated circuits, including the 155-0032-01 input preamplifier, 155-0085-00 input amplifier, 155-0078-00 vertical amplifier, 155-0091-00 channel switch, 155-0082-00 vertical output amplifier, and 155-0049-00 sweep control.
- Lazy Electrons Tektronix 475A & DM44 Repair Page
- The New Look in Portables, in Tekscope Vol. 4 No. 5, 1972
- Tek 475 / Tek 475A @ amplifier.cd
- Tek 475A in operation @ YouTube
475A with DM44 Board on top