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T.V. VISION IF SUBSYSTEM TRAINING BOARD
Objective:
In this trainer video IF signals (38.9MHZ) and sound signals (33.4MHZ) obtained from the tuner are given at the input of this section using IC3068. A separate detector has been used in this IC for obtaining the inter carrier sound IF signals. Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
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SOUND IF AND AUDIO OUTPUT SUBSYSTEM TRAINING BOARD
Objectives:
This trainer is based on 1190 IC and has got Multistage IF amplifier
FM Detector
DC Volume control
Audio power amplifier The main function of this trainer is to amplify the inter carrier sound IF SIGNALS (5.5MHZ) and to detect these to obtain the sound signals.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
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T.V. HORIZONTAL OSCILLATOR SUBSYSTEM TRAINING BOARD
Objective: This trainer consists of sync separator, line frequency oscillator phase comparator with synchronizing arrangements and amplifier for amplifying sweep signals produced by the oscillator. You will connect the video signals input, fly-back pulse input from the horizontal output stage and EHT generator training board. You will observe that the horizontal drive (15,625) obtained from this section is given to the EHT voltage Generator board. The synchronizing signals is removed from composite video signal and you will connect them to vertical sweep oscillator board. Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
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T.V. HORIZONTAL OUTPUT STAGE AND EHT VOLTAGE GENERATOR TRAINING BOARD
Objectives : This board is the mother board of the T.V. receiver. You will connect the following training boards to this board, From vision IF (keying pulse, video signal)
From Horizontal subsystem (video signal, Flyback pulse, Horizontal drive)
From vertical oscillator (+ 20V, blanking out)
110V power supply from TV power supply board
Video signal, various grid voltages etc. (To picture tube section)
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
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TV VERTICAL SWEEP OSCILLATOR SUBSYSTEM TRAINING BOARD
Objectives : This trainer performs two main functions.
a) Firstly - it produces oscillations at the vertical sweep rate (50Hz). The phase and frequency of these oscillations is controlled by the vertical sync signals obtained from the sync separator.
b) Secondly-it amplifies these oscillations and provides sufficient current of saw tooth waveform to the vertical deflection coil. Flyback pulses are also obtained from this section for suppressing the vertical retrace lines on the picture tube
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50cms PICTURE TUBE TRAINING BOARD
Objective: You will connect the vertical & horizontal deflection coil to the neck of the picture positions by changing it. You will connect the valve base to the respective point of P.T.EHT (16KV) cable is also connected to the final anode of picture tube, The above three points are taken from the TV horizontal output and EHT generator board. Loud speaker is provided which is to be connected from TV sound IF section training board Tuner is also provided on the cabinet.
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SWITCH MODE POWER SUPPLY (FOR TV RECEIVER
Objectives:
AII TV training boards from U1-U5 can be energized by this TV power supply it will have following voltages. 110V output horizontal output stage and EHT generator training board
21 V TV sound subsystem training board
12V TV vision IF subsystem training board and tuner
20V vertical sweep generator board. It is a single PCB with complete power supply circuit printed on the top of the panel
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
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Lamp-Board Rheostat (LSE)
Learning the basics of electricity doesn’t get much more basic than this. Experiment with series and parallel circuits by studying the brightness and intensity of light bulbs. Clear plastic base mounted with 5 lamp receptables, 5 sets of binding posts. Includes instructions. You need 3.7V DC clear bulbs and 6V lantern battery, not included.
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Lampholder, Metal (LSE)
These miniature sockets with two terminals fit all miniature screw base lamps. Why buy a whole new receptacle when you can just replace the socket? Pack of 10.
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Mini Bulb Holders (LSE)
Our 35mm diameter by 25mm tall mini bulb holder comes with holes for screws. Works with mini bulbs. Pack of 10.
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Lenz' Law Hoops (LSE)
This great demonstration teaches Faraday’s Law of Induction as well as Lenz’s Law. Show how passing a magnet through a complete loop causes the device to move. No movement at all occurs when using the split loop.
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Circuit Board Simulator (LSE)
This clever new way to reach resistance uses water - yes, water, to make child’s play of a difficult concept! Water is pumped through the circuit of tubes of various diameters to demonstrate how resistors work in electronic devices. Complete with stand and instructions. Shows why we connect voltmeters in parallel and ammeters in series.
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