Continuously variable voltage auto transformer, protected type.

Comprises a torridly wound transformer with a continuously variable output voltage 0 - 260 volts AC. Steplessly under full load. Input 220 to 240 volts AC, 50 Hz. In stout metal case mounted on a metal base with mains cable.

4mm Pin, 18mm long spring insert and hard plastic body. Overall lenght of plug 40mm.

Moulded hard Body,threaded with fixing nut. Plated brass insert with solder pin.

Require 8mm dia panel hole, maximum panel thickness 5mm.

a) Black b) Red c) Yellow d) green

Capacitance substitution box ideal for use in industrial and educational environments.

Unit will simulate capacitances from 100pF to 0.47µF in steps  ratio of 1:2

This model uses the same basic assembly as the electric motor, mounted on a base plate which also carries a hand drive pulley 120 mm in diameter coupled to the smaller dynamo pulley by a rubber belt. Electric output is via a pair of 4 mm socket & a light emitting diode is provided as simple output indicator. The model may also be used as motor on a 4 to 8 volts DC supply.

A simple demonstration of a Dynamo Model mounted on a wooden base. Hand driven by a gear. Simplified open frame construction which can be readily understood without detriments to its essential similarity to real machine. A 2 pole armature wound by enamelled copper wire to rotate in U shape magnet in pivot. While in rotation process through the gear wheel by hand, the bulb provided glows.

A simple demonstration of a Dynamo Model mounted on a wooden base. Hand driven by a gear. Simplified open frame construction which can be readily understood without detriments to its essential similarity to real machine. A 2 pole armature wound by enamelled copper wire to rotate in U shape magnet in pivot. While in rotation process through the gear wheel by hand, the bulb provided glows.

A simple dynamo model to differentiate AC from DC. Mounted on a wooden base. Two bulbs are provided for AC & DC current(s). The model is hand driven & when operated, the AC bulb shows flickering light to indicate AC current while the other bulb glows fully indicating DC current.

Suitable for mounting screw threaded type MES bulb. Round base with holes for screw mounting.

Insulated, PVC coated, with one end crocodile clip and at the other end banana plug.

Digital Meter for general purpose laboratory use housed in tough case use of a 3½ digit cover most of the ranges. Displays 13 mm characters; operates on mains with accuracy ± 0.3% typical. Linearity 0.2% typica. Available in ranges from 1.999mA AC to 199.9mV DC

DC voltage upto 1000 V in five ranges; AC voltage upto 750 V in five ranges; DC current upto 10 A in five ranges; AC current upto 10 A in five ranges. Resistance upto 200M ohms in seven ranges, with buzzer.

Each centre hole coil is wound on a plastic former & is provided with 4 mm socketed terminals.

The coil fits onto a double ‘C’ core, provides a suitable transformer for operation from a low voltage AC supply. In addition, it provides a useful electromagnet if used on one half of a ‘C’ core.

Each centre hole coil is wound on a plastic former & is provided with 4 mm socketed terminals.

The coil fits onto a double ‘C’ core, provides a suitable transformer for operation from a low voltage AC supply. In addition, it provides a useful electromagnet if used on one half of a ‘C’ core.

Wound on a plastic bobbin to fit a standard ‘C’ core. The coil is centre hole & provided with 3 mm socketed terminals.