uv199.com

RCA 200 - Bakelite base detectors


UX-200 bakelite-based variants:

Well known to be late and obsolete by 1926 when released, the UX-200 was competing with the A before it was even on the shelves. It's assumed that the frequency of higher grade boxed versions of the UX-200 are the result of extremely low sales and the inventory going to surplus.



RCA UX-200 Box front 
 
 
 
 
 
RCA UX-200 Detector box details


UX-200 variants:
s
R
C
A
UX-200
18
Tube
{v18} Globe (s-14) Short UX base, etched "Radiotron" "UX-200" (Horiz, corner dots, no meatball), RCA top logo; large smooth plate,  brass pins, clear

R
C
A
UX-200
19
Tube
{v19} Globe (s-14) Short UX base, etched "Radiotron" "UX-200" (Horiz, corner dots, no meatball), RCA top logo; small ribbed plate,  brass pins, clear





At long last the 200 gets an 'A'


In May 1926, RCA introduced the improved UX-200-A detector tube.

Improvements announced included -

{under construction}



UX-200-A


Note the corner dotted engraving marks included in the artist's rendering of the new UX-200-A. This provides strong evidence for the sequencing of engraving pattern changes in this set of variants.
RCA to release UX-200-A
(4-Apr-1926 Galveston Daily News)
UX-200-A Released
(May 1926)


UX-200-A variants:


R
C
A
UX-200-A
20
Tube
{v20} Globe (s-14) Short UX base, etched "Radiotron" "UX-200-A" (Horiz, corner dots, no meatball), RCA top logo, lg bulls-eye plate with square getter, brass pins


RCA UX-200-A var20  
RCA UX-200A var20
RCA UX-200-A plate detail

RCA UX-200-A stem detail
RCA UX-200-A var20 RCA UX-200-A var20

{v20} "Radiotron" "UX-200-A" with square getter.

R
C
A
UX-200-A
21
Tube
{v21} Globe (s-14) Short UX base, etched "Radiotron" "UX-200-A" (Horiz, corner dots, no meatball), RCA top logo, lg bulls-eye plate with UFO bulls-eye getter, brass pins

R
C
A
UX-200-A
22
Tube
{v22} Globe (s-14) Short UX base, etched "Radiotron" "UX-200-A" (Horiz, corner dots, meatball above Radiotron), RCA top logo, lg bulls-eye plate with UFO crescent-shelf getter, nickel pins

  • {v21} Stem pressing mold is marked with inverted "2" on both sides of glass. (not hand marked)




UX-200-AA bakelite-based variants:


{conlude this page with details of the last production UX200AA}


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