Radio Valve for home made radios

Valve

Radiotron UV 199 valve with early US 4 pin base. Tubular glass triode. Magnesium getter.
Radiotron UV 199 valve with early US 4 pin base. Tubular glass triode. Magnesium getter. The Radiotron UV 199 has a tubular glass bulb with a metallic sheen. The base of the valve is made of black plastic, branded with the RCA logo and ''Radiotron UV 199''. The underside of the base is branded with ''licensed only to extent indicated on carton'' There are four short pins protruding from the base. This valve was a three-electrode tube that was created with general purposes in mind, meaning that they could be used as an amplifier or a receiver. It could be purchased on it's own for those who needed a valve in their own electronic devices. It consumed less power than many other valves available at the time, making it a popular choice for portable receivers. The Radiotron UV 199 has a tubular shaped bulb, with the whole valve measuring 3 1/2 inches long. Most of the original literature pertaining to the Radiotron UV 199 also mentions the UX 199. The only difference between the UV 199 and the UX 199 is the base. The UX 199 has pins that fit a four contact socket, which was standard at the time, while the UV 199 has four pins that fit a small shell socket with a bayonet slot. When installed, the valve was meant to be in the vertical position. 06/10/2015 - Sticker missing from valve. Asbestos Inspection - Non-Asbestos.

possibly 1926

glass, Plastic

RCA (Radio Corporation of America)

Electronic and Electrical Engineering

LDUSC-EE-31

30

UCL Science and Engineering Collections