Moving coil for D.C. measurements, Any single range 0-1, 1.5, 3, 5, 10 Amps.
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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 contact arm & three metal studs mounted on a bakelite base with three brass terminals. The centre terminal is common connection to the arm & the other two terminals connected to the other studs.
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.
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5
Capacity (amps.)
8
10
15
A brass C.P. spring arm with press knob & two brass terminals. All mounted on bakelite base 80 x 55 mm.
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