A heavy beast, this analogue storage oscilloscope features a true dual trace CRT and was used by my father for many years. Manufactured by UK’s Telequipment Ltd, that by this time was owned by Tektronix, the scope was a more affordable alternative to Tek’s lineup. Telequipment was a popular workhorse in service workshops and schools rather than R&D labs and universities where the parent’s Tektronix often ruled.

The DM63’s design still provided premium features with mainframe plug-ins supporting a range of Y amplifier options. Each beam had a separate plug-in, so with dual channels in each, the scope can display and store four traces – very useful.

A differential amplifier is fitted in the left hand plug-in which allows measurement of small signals – down to 50μV per cm. With balanced inputs it’s possible to filter out common loop hum that might otherwise obscure the low level signal you want to investigate. Again, very handy.

The right-hand plugin has two amplifiers allowing a dual trace to the lower beam in ALR or CHOP mode, so with the differential amplifier this set up enables three traces in total. The dual trace amplifiers resolve down to 5mV/cm with a 20MHz bandwidth although the DM63’s mainframe is linear to 15MHz.

Telequipment DM63 front panel with trace intensity, focus and storage along with timebase sweep controls to the right. Lower area has two Y-axis plugin-ins.

Telequipment DM63 Front panel

Telequipment DM63 front panel with trace intensity, focus and storage along with timebase sweep controls to the right. Lower area has a differential amplifier mounted in the left and a dual trace in the right side plug-in.

Telequipment DM63 Differential and dual trace plug-ins

Telequipment DM63 front panel with trace intensity, focus and storage along with timebase sweep controls to the right. Lower area has a differential amplifier mounted in the left and a dual trace in the right side plug-in.

Telequipment DM63 Oscilloscope

Telequipment DM63 Mainframe manual

Links

Mark Hennessy has written some really useful posts about faults and fixes for the DM63. I’ve added links below, together with the Telequipment range for my ease of reference. I need to fix mine!