|Year: 1923/1924||Category: Broadcast Receiver - or past WW2 Tuner|
|Valves / Tubes||6: UV199 UV199 UV199 UV199 UV199 UV199|
|Tuned circuits||1 AM circuit(s)|
|Wave bands||Broadcast only (MW).|
|Power type and voltage||Dry Batteries|
|from Radiomuseum.org||Model: 2 - Operadio Corp.; St. Charles IL|
|Material||Leather / canvas / plastic - over other material|
|Shape||Portable set > 8 inch (usable without mains)|
The original tube line up has to be UV199 if this model has arrived in 1923:
The "Saga of the vacuum tube" by Tyne tells us on page 314: "In April 1925 the UV199 was superseded by the UX199, announced August 1, 1925. Production continued up to 1931, although after 1927 few new receivers were built to use it. Nickel-plated contact pins were introduced in 1927."
After some time the UX tubes were noted only by the numbers and a bit later only by the last two digits. The UV199 was introduced in December 1922, the same time as the UV201A.
|Price in first year of sale||190.00 $|
|External source of data||Ernst Erb|
|Source of data||Radio Collector`s Guide 1921-1932|
|Mentioned in||The Radio Collector's Directory and Price Guide 1921 - 1965|
|Literature/Schematics (2)||Radio Broadcast, Jul. 1924, p. 274|
All listed radios etc. from Operadio Corp.; St. Charles (IL)
Here you find 64 models, 41 with images and 29 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.