Summary
Sharp cut-off Tetrode, Philips manufactured equivalent to the American type 224A (24A). Introduced in 1928 with a Philips type number: F242 but re-named PH224A in the early 1930s. Used as a Class A R. F. amplifier.
Manufacturer: Philips, Holland
2.5 V indirectly heated cathode.
Physical Description
Conical bulb (with top cap) on 5 pin UY style base
More Information
-
Collection Names
-
Collecting Areas
-
Acquisition Information
Donation from Australian Wireless Valve Co (AWV Co), 23 Feb 1972
-
Manufacturer
-
Inscriptions
Bulb: Philips Miniwatt/PH 224A/Made in Holland
-
Brand Names
-
Classification
-
Category
-
Discipline
-
Type of item
-
Overall Dimensions
124 mm (Length), 45 mm (Outside Diameter)
-
References
[Book] Stewart, Finlayson (Fin). 1995. Illustrated History of Philips Radio Valves to 1935., 1995, 17, 18 Pages
-
Keywords