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Rheostat

Rheostat-Sliding Contact :

(ZES 221)

Comprising a layer of resistance wire wound on an insulating heat resistance
tube (Porcelin) which is supported by cast metal feet. A sliding contact and
three 4mm socket terminals are provided, one terminal being connected
to the sliding contact and the other two to the ends of the winding, enabling
the unit to tbe used as rheostat or potentiometer.

TYPE	MAX	Max	Tube dia mm	Tube Length mm
TYPE	(Amps)	(Ohms)	Tube dia mm	Tube Length mm
(a)	6.5	4.4	43	200
(b)	5.0	11	43	300
(c)	4.2	12	43	200
(d)	4.2	20	43	300
(e)	3.3	16	43	200
(f)	3.3	27	43	300
(g)	2.3	56	43	300
(h)	1.6	50	43	150
(i)	1.6	100	43	250
(j)	0.8	160	43	150
(k)	0.8	240	43	200
(l)	0.3	1700	43	200
(m)	0.3	2850	43	300
(n)	1.0	365	56	300

Rheostat, Single Tube, Protected :

(ZES 222)

Variable up to 345 ohms at 1.2A rating for use as a series resistor or a potentiometer. Enclosed type, in metal case with windings on porcelain former 350 mm long x 56 mm dia. Three 4mm socket terminals and four mounting lugs tapped.

Electronic Instruments

Physics Instruments

Rheostat