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5N10.60 - Short Wave Radio Demonstration Apparatus

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​5N10.60 - Short Wave Radio Demonstration Apparatus

Preview
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Title5N10.60 - Short Wave Radio Demonstration Apparatus
Objective

The Short Wave Demonstration Apparatus is an interesting introduction to the fundamentals of radio.​

StatusAvailable
Assembly Instructions

Connect the two antennae to the base unit.  Use the tube & string assembly to set the correct length for the antenna receiver and 
adjust the antenna length to make sure the bulb is not too bright in order to avoid
burning the bulb out.

Always check that the transmitter begins oscillation immediately by utilizing the receiver array. The transmitter tubes may be permanently damaged by drawing excessive plate current if oscillation does not immediately commence.

The oscillator unit is a basic astable multivibrator that drives a high-frequency (short wavelength) oscillator loop. The circuit consists of two 801A triodes, a center-tapped, wirewound resistor, two large capacitors, the oscillator loop, and a choke coil, all of which are connected as indicated in the schematic diagram below.

Setup Time10
Operation Time
Preview Time5
Operation Instructions

The shortwave transmitter consists of a power supply for the filiment voltage and about 500 volts to the plate terminal of the oscillator. The power oscillator is connected to an adjustable transmission antenna which can be either vertical or horizontal. The receiver consists of an antenna dipole with a small flashlight bulb connected between the two poles. Extended antenna length is 74 cm each, not including coupling wires to the bulb. The transmitter should begin oscillation immediately upon application of power. Always check that the transmitter begins oscillation immediately by utilizing the receiver array. The transmitter tubes may be permanently damaged by drawing excessive plate current if oscillation does not immediately commence. The operational frequency is calculated at about 94 MHz.
 ​

ExportableNo
Demo on DimeNo
PIRA 200No
Export Instructions (if different)
HazardsNone, Exposed High Voltage - AC Current
Analysis/Information

​The oscillator unit is a basic astable multivibrator that drives a high-frequency (short wavelength) oscillator loop. The circuit consists of two 801A triodes, a center-tapped, wirewound resistor, two large capacitors, the oscillator loop, and a choke coil, all of which are connected as indicated in the schematic diagram below.

Category5 Electricity and Magnetism
Subcategory5N - Electromagnetic Radiation
Keywordstransmission, radio polarization, radio transmitter
Construction Information
 
Equipment TitleUse SHIFT+ENTER to open the menu (new window).
  
QuantityUse SHIFT+ENTER to open the menu (new window).
  
osillator unit with tubes
1
transformer unit
1
receiving antenna with bulb detector
1
antenna - fixed length
2
antennas - variable length
2
antenna coupling loop
1
light bulb - #22
1