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AV25

Information - Help 
ID = 78479
       
Country:
Australia
Brand: Amalgamated Wireless Valve Co. Ltd. (AWV); Sydney, NSW
Developer: Amalgamated Wireless Valve Co. Ltd. (AWV); Sydney, NSW 
Tube type:  Triode, vacuum   Text 
Identical to AV25

Base Jumbo 4-pin bayonet
Was used by Technology / Measurement
Filament Vf 6 Volts / If 1.6 Ampere / Direct / Parallel, (AC/DC)
Description

This tube is a demonstration triode intended for educational use. The filament consists of four parallel oxide coated wires. These are located parallel to the plate. The widely spaced grid is placed between the filament and plate in the normal manner. The plate itself is coated with a phosphor which fluoresces green under electron bombardment. The higher the plate voltage (300v max), the greater the fluorescence. A unit was developed to use the tube and its companion AV43 Demonstration Cathode Ray Tube and these units were widely used in physics laboratories in schools and universities. See full "Radiotronics" October 1956 and January 1959 below.

This tube was designed by Vivian Anthony from AWV and details on the tube specifications were never published in ordinary tube data books.

 
Dimensions (WHD)
incl. pins / tip
x 194 x 54 mm / x 7.64 x 2.13 inch
Information source - - Manufacturers Literature   
-- Collector info (Sammler)   
  av25_ac_circuit_radiotronics_1056_p_128.png
  AV25: Fin Stewart
Fin Stewart
 
awv_av25_triode_1_tpm.jpg
AV25: Tamworth Powerstation Museum Australia
Fin Stewart

 
jumbo_4_pin_transmitting_base.png
AV25: Fin Stewart
Fin Stewart

 
av25_dc_circuit_radiotronics_1059_p_128.png
AV25: Fin Stewart
Fin Stewart


from Just Qvigstad

Usage in Models 1= 1959

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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