The tubes listed below (unless indicated otherwise) are used and have been twice* tested for mutual conductance, gas, leakage and shorts on my Hickok 539B tube tester. All have tested as good functional tubes well above the minimum, acceptable level and are individually boxed.

(* tested the second time just before shipping)

Those of you new to old radios and their tubes, please take a moment to read my notes (right column) on tube numbering and style types, be sure and look at the images I've provided by clicking on the (brown) links.

Keep in mind that quantities are limited, some to only a very few.

Matched pairs* are limited and if you desire such, let me know if you don't find any listed. If not already listed and I match for Gm only, the fee is $5.00 per pair, to match for Gm & brand, the fee is $15.00 per pair over and above the individual price.

* The industry standard for matched pairs is 25%. I match a little closer that that. Typically my matched pairs will be within 10% but no more than 15% of each other.

The list below are 1920's/30's tubes. Both "ST" and "Antique Globe" styles are included. If available in the "Globe" style, they will be listed with their original "UX" or "UY" prefix following the 2 digit listing.

Tube testing information

Adaptors to use UX-199 tubes in place of WD-11's  $18.00 each

O1A & 201A, WD-11,  99's
^click on the above for images of these tube types & styles

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** indicates new old stock
Bold text = "ST" bulb

NOTE: Prices do not include shipping and may change without notice

PLEASE > READ < BEFORE ORDERING

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The differences in the "ST" & "Antique Globe" style tubes are strictly cosmetic. The "Globe" styles are the early style & less common. They command a higher price because they look more authentic when peering into the insides of the 1920's radios.

O1A & 201A, WD-11,  99's
^click on the above for images of these tube types & styles

CX base = Cunningham's designation for the UX base
UV base = 4 pin stubby pins
UX base = 4 pin w/long pins
UY base = 5 pin w/long pins
 

UV/UX-200 (00)
gas filled triode detector
filament: 5 volts 1A tungsten

UV/UX-200A (00A)
gas filled triode detector
filament: 5 volts .25A throated

UV/UX-201 (01)
triode AF/RF amplifier
filament: 5 volts 1A tungsten

UV/UX-201A (01A)
triode AF/RF amplifier
filament: 5 volts .25A thoriated

UV/UX-199 (99)
triode AF/RF amplifier
filament: 3 volts .25A thoriated

WD-11
triode AF/RF amplifier
filament: 1.1 volts .25A coated filament, special base

WD-12
same as WD-11 except for base

00A, same as UX200A
01A, same as UX-201A
301A, etc, same as 201A
C-11, same as WD-11
C-12, or X12 same as WD-12
12A, same as UX-112A
71A, same as UX-171A
80, same as UX-280

Vacuum tube numbers were not standardized until the early 30's. At that time all the prefixes such as "UX" and other extra numbers and digits were dropped. Examples:

No. UX-201A became a "01A", a UY-227 became a "27" and so on.

Below are some images of interesting tubes:

UV 201A "rainbow" getter

Brightson Blue tube

Tube testing & evaluating