| Cat
No. |
Description |
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De-sauty’s Bridge
For comparing capacitance in terms of resistance. Three decade dials of
10, 100 & 1000 ohms are there in one arm. And another set of 3 decade
resistance dials in the 2nd arm. Fitted with special morse key. Manganin
coils. Accuracy 0.1 %. |
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Schering Bridge
For measurement low capacitances. The bridge comprises 3 decade dials of
standard capacitors of .001, .01 & 1 mfd. Two Resistive Ratio dials. A
variable condenser 0-1000 pF and three resistive decade dials of 1, 10 &
100 ohms Manganin Coils Accuracy 0 .1 % |
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OVERHEAD PROJECTORS |
|
341 |
Overhead Projectors :
A most compact light weight body projector having 24V/250 watt
Halogen lamp for condenser size 25x25cms. Thermostatically controlled
heavy duty cooloing blower. Finest Quality projection lenses and
reflecting Mirror for horizontal projection which works through roller
sliding system, complete with 8 meters of cellophane Roll and 4 Numbers
Overhead Transpareencies in thick card frame (Blank) with 6 numbers
Grease pencils, instrument workable on 220/230 volts Ac. Duly packed in
thick card board box. |
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|
342 |
With 24V/250Watts halogen Lamp & computer
fan For efficient cooling (Deluxe Model) |
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|
343 |
Same as 342 but with remote control switch
On/OFF of OHP. |
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|
344 |
Same as above 341 Model but with
dual lamp arrangement ,very convenient to change the bulb (by just
slider knob) if the bulb in operation is fused. Remote control
switch is also provided |
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|
|
345 |
Screen for projector : It is
special type screen fitted on metallic stand easily collapsible, it
takes few seconds to assemble. The screen is having box with spring
action for rolling the screen autmatically packing up in metal box.
Size of Screen :- (i) 50" x 70"
(i) 50" x 50" |
|
MODULATED CIRCUITS |
|
346 |
Amplitude Modulation & Demodulation
1. To construct amplitude Modulator using transistor and to
demonstrate how much intelligence can be added, to a carrier and observe
the amplitude modulated waveforms and check the % of modulation.
2. To demonstrate how intelligence can be recovered from an amplitude
modulated carrier by using diode demodulator. It has got three parts
namely RF oscillator, AM modulator and AM demodulator. Provided with
built in regulated power supply @ + 15V/500mA. |
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|
|
347 |
Frequency Modulation & Demodulation
To demonstrate how the modulating signal changes frequency of the
carrier rather than amplitude and observe the frequency modulated
waveform on CRO. To study the changes in carrier centre frequency & to
study the frequency deviation. To study how the phase lock loop can be
used for demodulation and the audio signal is demodulated. Provided with
built in regulated power supply @ + 5V/250mA ; 5V/250mA +15V/500mA. |
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|
|
348 |
Phase Modulation
1. To demonstrate how a carrier's instantaneous phase angle is made
to vary in proportion to the modulating signal's amplitude.
2. To demonstrate the effect of frequency deviation when the modulating
signal crosses zero axis.
3. To demonstrate how phase change occurs when the modulating wave
changes polarity from + to - and from - to +. To demonstrate why phase
modulation is some times called as indirect F.M. Provided with built in
regulated power supply @ +15V/500mA. |
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