Qtronix KT-30 is a keyboard featuring a large three-button trackball. The design is similar to the Cherry G80-1800, but with the lock LEDs to the left of the function key row instead of to its right. Where Cherry added a small trackball by raising the numeric keypad in the Cherry G80-11800, Qtronix placed a much larger trackball to the far right.

The keyboard is XT/AT switchable, with a serial lead for the trackball.

Instances with Cherry MX Blue switches are documented here. There are apparently other variants of this board with different switches.

Variants

KT-30M

Sandy has documented the board as having Cherry MX Blue switches, pictured below.

Gallery

KT-30M keyboard

Unusual left-hand LED panel

Rear of the case

Upper case removed

XT/AT switch

Label

"Mighty KeyBoard™" branding

Trackball

Trackball close-up

Trackball internals

Ball removed from trackball

KT-30BP

This keyboard has vintage Cherry MX Blue switches.

The keycaps are a mix of double-shot and dye-sub. The 1u keycaps are double-shot. All others are dye-sub. They seem to be Tao Hao.

The PCB design includes anti-ghosting diodes.

Gallery

KT-30BP Keyboard

With keycaps removed

With keycaps removed

Rear of the case

AT/XT switch

Upper case removed

Trackball internals

Plate, switches and PCB

Plate, switches and PCB

View of diodes

Rear of PCB

Keycaps front

Keycaps rear