Telequipment D83

The Telequipment D83 is a 50 MHz CRO. It is a larger-screen, upright version of the Telequipment D75.

Telequipment D83
50 MHz scope
Telequipment D83

Produced from 1972 to (?)

(All manuals in PDF format unless noted otherwise)

The D83 takes two plug-ins that are also compatible with D75, D63 and DM63. Vertical plugins include the V4 dual trace amplifiers, the V3 single channel differential amplifier, the V1 single channel amplifier, and the V5 single channel amplifier with delay line (primarily intended for the DM63/D63 mainframes that have no built-in delay lines, whereas D75/D83 do). Timebase plugins include the S1 single timebase and S2 dual timebase.

NB There's a chance of some confusion with the input specs below. While the service manual states input impedance, that's for the Z modulation on the main frame. This text will be removed once the specs for the plug-ins (see above) are made available on their own pages. The weight stated in the various documentation (service manual, operator manual, catalogue, etc) differs, too.

Key Specifications

Bandwidth DC to 50 MHz (−3 dB), AC coupled ≥2 Hz
Risetime 7 ns
Deflection 5 mV/div to 20 V/div in 12 calibrated steps (1−2−5 sequence)
Timebase 2 s/div (B: 1 s/div) to 100 ns/div, 1−2–5
Input impedance 1 MΩ // 29 pF
Max. input max. 400 V DC + peak AC
Trigger modes A: Auto, DC, AC, HF Reject; B: Auto, AC
Trigger Sources CH1, CH2, Alternate
Operating modes CH1, CH2, Alt, Chopped, Add; CH2 can be inverted
Sweep modes A only, A intensified by B, B delayed by A, A and B mixed, delayed B variable or triggered, repetitive or single shot
Delay time 10 μs to 20 s
Calibrator ~1 kHz, 30 mV and 300 mV, 3 mA, square wave, ±1% voltage and current, ±20% frequency
CRT 154-0640-05 tube, P31 phosphor, 15 kV acceleration (–2.5/+12.5), 8 × 10 graticule, 1.2 cm per division
Power 100−125 V in 5 V steps, 200−250 V in 10 V steps, selected via primary voltage selector, 48–400 Hz, 85 VA
Dimensions 290 mm (H) × 215 mm (W) × 520 mm (D)
Weight 9.5 kg (mainframe), 14 kg with plug-ins
Environment Operating: +5°C to +40°C, Non-operating: –25°C to +70°C




CRTs used in the Telequipment D83

Page Part nos Description Designers Used in
T7400 154-0640-00 154-0640-05 154-0640-31 154-0640-10 154-0672-00 154-0673-00 154-0822-00 154-0823-00 large-screen CRT (8 × 10 divisions of 1.22 cm) 7403N 7603 Telequipment D83