Work on this tube started at the G E laboratories in the fall of 1921. The type number was assigned to it in December 1921 and iit was available to the public the following year. This tube was not announced as part of the RCA general tube line. It was used as the final stage amplifier at radio station WGY in their first transmitter.
Literatura
-- Collector info (Sammler) Banneitz, TB der drahtl. Telephonie u.Telegr. 1927
- - Manufacturers Literature Development of Radiotron transmitting tubes to 193
Tube Lore (II)
UV208: Fin Stewart
Fin Stewart
Just Qvigstad
UV208: Banneitz, TB der drahtl. Teleph. 1927
Anónimo 15 Coleccionista
