Sodium spectral lamp for spectral lamp power supply.

Technical Specifications :
Base connection: 4 pin
Diameter: 30mm
Length: 140mm

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A hollow, wooden, resonance box 1290 x 130 x 110mm, with scales divided in millimetres between fixed bridges over which the wires are stretched. 
Another wire passes over a pulley and can be loaded as desired.
A spring balance reading 100N x 5N is fitted to one end and the tension exerted and measured can be finely adjusted by a wing nut. 

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A wooden resonance box 1140mm long, 125mm wide and 100mm high. 
At one end of the base are two 50N spring balances with hooks and at the other end are two corresponding wrest pins. 
Supplied with two steel wires, 30 swg, 1 metre long.
Also included are three bridges; one large (to span wires) and two small (for the individual wires).

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This is a low cost, compact spectral lamp with power supply. 
The lamp is mounted inside a black protective tube standing up from the top of the power unit. 
Unlike the dull light available from Spectrum Tubes these tubes provide a bright and intense light used for optical work and for AA Spectrometry.
By rotating the outer sleeve of the lamp cover, different shaped apertures can be selected.

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An economically priced instrument which is capable of useful quantitative work. 
The main structural parts, including the collimator and telescope bodies are high quality castings. 
All metal parts are well coated with high quality finishes.

SCALE: 
170mm diameter, divided 0 to 360° x 1°, independently rotates with locking screw. 
A spring loaded Vernier scale attached to the telescopic mount provides readings to 0.1°.

TELESCOPE: 
Mounted on movable pillar with adjustment by a locking screw and axis adjustment. 
Ramsden eyepiece with cross wires and locking ring focus adjustment.
Objective lens has 170mm focal length, 21mm aperture and is carried in a spiral focussing system. 

COLLIMATOR: 
Mounted on fixed pillar with axis adjustment. 
Objective lens has 150mm focal length, aperture of 212mm and is carried in spiral focussing system. 
Unilaterally adjustable slit 6mm long.

PRISM TABLE: 
The table is provided with three levelling screws and has lines marked to assist placement of prism.

STANDARD ACCESSORIES: 
Includes 1 prism clamp for prisms up to 40mm high, 1 diffraction grating holder, aperture 25 x 25mm, 1 small screwdriver, 1 tommy bar for axis adjustment. 
Full instructions. 

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This instrument gives a brilliant spectrum with a dispersion of approx. 11°. 
The slit is of variable width and adjusted by rotating the end piece.
For the rapid examination of spectral composition of white light sources. 
Supplied in a wooden case.

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A black panel behind the tube eliminates distracting ambient light and protects the tube from breakage. 
Specially designed box holds the tube firmly and prevents the student from touching the electrodes. 
Operates on 220V A/C at 50Hz and is suitable for 26 cm tubes. 

Technical Specifications :
Tube Length: 26cm
Power: 220V A/C at 50Hz

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Conversion of potential energy in a wound-up spring to electrical energy. 
The steel shaft carries a clock spring with a free wheel device, winding ratchet and aa 56mm diameter aluminium 'V' pulley. 
This could also be used to wind a weight on a cord showing the change from potential energy to kinetic, and back, in the raised weight. 
The Energy Transfer Kit consists of a number of separately available units which enable the user to show conversions of one form of energy to another in a variety of different ways. 
All units have a base measurement of 165 x 100mm and have 4mm socket terminals where appropriate.
Supplied complete with driving belt.

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