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Vacuum Tubes for Vintage Radios

(1920s & Early 1930s)

 

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LINKS AT AUCTION INFORMATION CONTACT updated 8/29/2016

> Some interesting notes for Newbie's on 1920's & '30s tubes.

> Important info - PLEASE READ BEFORE ORDERING

Tube #

Description - Image 

Price Ea. Purchase

WD-11  
 

(Bakelite base, no tip) $59.00
 
 01A  "ST" style OUT OF STOCK (Use UX-201A)    
 UX-200A
 
"Globe" style gas filled detector
OUT OF STOCK
(201A will work in most apps.)
   
  UX-201A  "Globe" style mixed brands, call extra (if available) $19.00
 
 5Z3   $18.00
**10/10Y NOS (VT-25)   inquire
  UX-210     inquire
12A "ST" style   inquire
  UX-112A (12A "Globe" style   inquire
20     inquire
  UX-120  same as #20  
24A   "ST" style mixed brands only $20.00
 
  UY-224/A (24A "Globe" style  sold out use 24A    
UX-226 (26
 
"Globe" style out of stock USE #26    
26
 
"ST" style only mixed brands only $20.00
 
27
 
"ST" style only $20.00
 
  UY-227 (27 "Globe" style mixed brands only
 
$25.00
 
30 "ST" style only mixed brands only $15.00
 
35/51      
  UY-235 (35/51 "Globe" style out of stock UY-224A is an ok sub    
41   $15.00
42 #41 will work fine in sets with a power transformer out of stock
 
45 mixed brands only $49.00
 
  UX-245 (45 "Globe" style out of stock Use #45  
46  "ST" style     inquire
 246/346 "Globe" style   inquire
47  "ST" style   inquire
  247/347 (47 globe)     inquire
  UX-250/350 (50 globe)   out of stock
 
Use #50
71A   "ST" style $39.00
  UX-171A "Globe" style $49.00
75   $ 15.00
76     inquire
77   N/A
80   "ST" style $25.00
  UX-280 (80 "Globe" style out of stock use #80
81   $22.00
82     inquire
83V     inquire
99/V99 (tubular bulb) UX-199/V99 $38.00
99/X99 (tubular bulb) UX-199/V99 $38.00

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Vintage Vacuum Tube Info for Newbie's

RadiolaGuy.com
C.E. Clutter

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During the 1920's, there was no standard numbering system for vacuum tubes. Although the "201A" was the standard used in most battery operated radios for RF & AF amplification. The suffix "A" indicated a thoriated filament which drew less current than it's predecessor the 201 which had a 1 amp, tungsten filament. The 201 with it's 5 volt tungsten filament lit up like a light bulb  whereas the "A" version with it's 1/4 amp filament produced a dull, warm orange glow.

Many manufacturers had their own prefix designation for the "201A". For the RCA "Radiotron", it was UX-201A, Cunningham was CX-301A, Montgomery Wards; GX-201A and there were many other variations by brand name and some brands had their own numbers.

The UX, CX, DX etc, simply indicated standard 4 pin, plug-in base. This "UX" applied to other 4 pin tubes as well such as UX171A, UX-210, UX280 and any 4 pin plug-in tube. The UV prefix was for the bayonet version (stubby, short pins) that required push & twist to lock in place. The tube sockets in many radios would accommodate either UX or UV based tubes. In the early 1930's tube numbers were mostly standardized, the prefixes were dropped and nearly all of the 1920's tubes were now designated with two digits. The famous 201A was now an "01A", UX120, was now a 20, the 280 became an 80, 210 a 10 and so on.

More valuable info > on tube testing.

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