Westinghouse UV-201 (Tubular Design)
|This tube is a UV-201, but
is a completely
different design than the familiar balloon shaped UV-201
that was produced both by GE and Westinghouse under the RCA name.
It would appear that when Moorhead left the business of tube manufacture, Westinghouse took over at least part of that operation. They apparently used some of the leftover Moorhead bases, as the tube shown here has traces of the former steel-stamped markings which have been incompletely ground off.
New markings were ink stamped on the base, but these are mostly worn off on this example. The word "Aeriotron" and the license notice is visible, as is the Westinghouse logo, but the type number is gone.
Available information is sketchy, but it would appear that Westinghouse was making tubes at two different locations. Tubes of this type were made at one location, and tubes of the normal type were made at another. They shipped both types of tubes to RCA for a few months during 1922. Only about 3200 of these tubes were made.
This tube used a lower voltage filament (4 volts) than the normal 5-volt UV-201. It is essentially the same tube as the WR-21, but with a different base. The UV-201 designation surely caused confusion and would have led to the accidental burnout of most of these tubes. Consequently, the survival rate was very low.