RCA UV-200 - Winged plate detectors
- General Electric was the primary producer of UV-200 tubes
- Westinghouse Lamp Company made a significant number of UV-200 tubes. Eventually I will create pages to cover Westinghouse seperately
The UV-200 detector poses the greatest challenge in identifying all of the variants, in order.
see Key Observations for evidence list used to date RCA tubes.
See RCA boxes for pictures of RCA 200 box styles.
UV-200 winged-plate variants (early):
The push for factory mechanizationFrom this point forward (mid 1921?), we can assert that G.E. must have done everything possible to mechanize and streamline the production process, which was very costly. They realized they could skip the 'plug' of cork or cotton placed between the four lead wires as they fed out of the tube stem and into the socket pins. Maybe early base assembly left a risk of shorts, and this was seen to prevent them.
Identification of the winged plate detector variations require careful inspection of the cuts made to construct the plate.
Angled cuts are earlier, done by hand, with notch cuts coming later. Machines were created to cut plates, reducing the inconsistencies introduced by hand work, increasing volume, and reducing labor costs.
Its also clear General Electric wasn't happy with the UV200/201 support mount designs from the beginning. These caused vibrations that created a terrible howl in receiving sets. The race was on to redesign the whole setup, which also allowed them to consider how the stamping and cutting machinery could be better leveraged.
UV-200 winged-plate variants (later):
A new RCA logo
In August 1922, updates were made including a new 'RCA' logo
The last of the winged plate detectors would be made no later than Aug 1923.
last updated 8-Dec-2018