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Y-224

Information - Help 
ID = 25639
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Screen-grid Tetrode   Audio Frequency 
Identical to Y-224 = 224 = NY224 = FY224 = SY224 = GSY224

Base UY-Base, 5 Pins (USA, April 1927) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Parallel, (AC/DC)
Description

Star-Ko made adds for the Y-224 (Y224) "AC Screen Grid Amplifier" at about 1928. Tyne lists about 250 US brands for vacuum tubes in "The Saga of the Vacuum Tube" but not Star-Ko. Since Star-Ko praises that the tube was produced "in tremendous quantities" and sells it for $ 1.39 in quantities with a list price of $ 4.00 we think that Star-Ko bought tubes with lower quality from a big tube maker to sell them off. Or they could sell at a time where the tube was already obsolete. See also X-245.

 
Dimensions (WHD)
incl. pins / tip
x 123 x 45 mm / x 4.84 x 1.77 inch
Weight 50 g / 1.76 oz
Information source -- Collector info (Sammler)   
Allied Radio Catalog (Knight)   p46 1931
 
y-224bosch_1_klein.jpg
Y-224
Geri Meier

 
y224_so.png
Y-224: ARRL Handbook 1972
Michael Schlör

 
starko_radio_tubes.png
Y-224: Vitor Oliveira
Ernst Erb


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