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Encyclopedia amplificātum

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Collecting the greatest tube ever made: the 201 amplifier.

In production from 1920 until the mid 1930s, there was never a tube with more variety, or longevity.

It's fair to say that the 201a was behind every radio in America for almost a decade. Many of these brand sold 199 & 200 tubes also.

See these pages for RCA 201 tubes


Index of (330) non-RCA '201' tube brands.


AirexAirex
Air Viking
Air
Viking
Amplidyne
Amplitone
Arctron
Argon
AristocratAristocrat
ArrowArrow
Bear
BooneBoone
Bostron

Brightson
ClaratoneClaratone
ColumbiaColumbia
CometComet
CrescentCrescent
Crusader tubesCrusader
Dalton Laboratories
DeforestDeforest
Diamond
Diatron tubesDiatron
Dilco
DisXron tubesDisXtron
DollarDollar
Donle
Double-Life
Duotron
Duovac
Duplex
Duratron
Dutch
Dyn-a-blue
Dynamic
Dynetron
Eagle tubesEagle
EchotronEchotron
ECO
Econotube
Eliteron
Emerson
Eureka
Eveready-RaytheonEveready
EverestEverest
World Top
Falck
Fast-Tron
Federal
Find-Tron
Frisco
Fultone
Full Tone
Giant
Gibralter
Gold Bond
Gold Seal tubesGold Seal
Goldtone
Goode
Good Luck
Green Seal
Greentron
Guaranteed
Gurney's Sunshine

Harp
Hercules
HickoryHickory
Hylon
Hytone
Hytron
Hy-vac
IroquoisIroquois
Jaeger Labs
Johnsonburg
Keen-Tone
Kelly
Kleartone
Kleer Tone
Knight
Le Radion

LECO
Long-Life
Magnadyne
Magnatone
Magnatron
Magnavox
Majestic
Marks
Marle
Marvin tubesMarvin
Mello-tron
Melrose
MercuryMercury
MeteorMeteor

Milo
Monotron tubesMonotron
Murdon
Music Master
Myers
National-Union
Navigator
Neon Lite
New-Tone
Nightingale
Northome tubesNorthome
Novotron tubesNovo-tron
Nun-Bet-Er
Nutro
Ok tubes
OK
Ozarka
Pace Setter
Panama
Par
Paramount
Parla

Peak
Pearson
Peerless
Perfectone
Permatron
Philmore
Phonetron tubesPhonetron
Pilgrim
Pilotron tubesPilotron
Pioneer
Pla-more
Playtron
Powertone
Pur-A-TonePur-a-tone
PuratronPuratron
Qualitone
Qualitron
Quinn

R.A.C.
Ra-DexRa-Dex
RavacRa-V-aC

Rayo
Ray-o-vac
Raytron
Realtone
Receptron
Regal
Regent
Remarc
Royaltron
Ruben
Ry-tone
ShamrockShamrock
SilvertoneSilvertone
(Sears)
Silver ShieldSilver Shield
SolarSolar
Solartron
Sovereign
Sparton
Sterling
Stewart Warner
Strongson
Strong-tone
Supercraft
Supertone
Superior
Sylvania
TalkerTalker
Teletron
Testeed
Thurman
Tip-Top
Titan
Trail-Blazer
Triad

Troy
True-Blue
URECOURECO
Van Horne

Veby
Victor
Viking
WALCO tubesWalco
WRC
Yankee
Zetka






Patterns have emerged, indicating that there were three main periods of boom & bust. I named these as best I could, considering the approach used by the comic book industry which set the bar creating a taxonomy extraordinaire

  • Golden Age of Rubber Stamping: where any unmarked or repaired tube could have a rubber stamp label on the brass base and be called a 'manufactured' tube. Of course, someone had to be making the actual tubes...
  • Silver Age of Label & Box: large efforts were made to create alluring brands and merchandizing. The race for supremacy was on, though in general all of the tubes performed the same, or slightly worse than the baseline RCA 201a tube.
  • Bronze Age of Licensing: the last of the bootleggers were chased away or sued into oblivion by RCA. Now every average Joe company with a brand wanted a radio tube with their brand on it! Most found that the market was saturated, and without understanding the upcoming shifts in technology to A/C power tubes and an economy now in a depression, many unloaded them to surplus stores in the 1930s, where the price fell to 49 cents


Consolidated Brand-Mfg-Alias Index

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