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Don't see what you need? Contact us. We have many more tubes that are not yet listed. We also have new and good used tubes in most other numbers including preoctal, globe/balloon, octal, loctal, miniature, subminiature, metal, power, transmitter tubes and many more.

MDB Ventures Audio Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 6AX4-GT $4.00 Tung-Sol 115% --- NOS (OB) ---
1 6AX4-GT $4.00 Tung-Sol 110% --- NOS (OB) ---
1 6AX4-GT $4.00 Tung-Sol 110% --- NOS (OB) ---
1 6AX4-GT $2.00 CBS 120% --- NOS (OB) ---
1 6AX4-GT $2.00 CBS 115% --- NOS (OB) ---
1 6AX4-GT $2.00 RCA 115% --- NOS (OB) red lettering
1 6AX4-GT $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GT $2.00 RCA 120% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 120% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 115% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 115% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 115% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 110% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 RCA 110% --- NOS (OB) silver lettering
1 6AX4-GT $2.00 Raytheon 115% --- NOS (OB) ---
1 6AX4-GT $2.00 Raytheon 115% --- NOS (OB) ---
1 6AX4-GT $2.00 Raytheon 115% --- NOS (OB) ---
1 6AX4-GT $2.00 CBS 115% --- NOS (OB) ---
1 6AX4-GT $2.00 CBS 115% --- NOS (OB) ---
1 6AX4-GT $2.00 Philco 115% --- NOS (OB) ---
1 6AX4-GT $2.00 Philco 115% --- NOS (OB) worn box
1 6AX4-GT $2.00 Triad 125% --- NOS (OB) ---
1 6AX4-GT $2.00 Silvertone 110% --- NOS (OB) ---
1 6AX4-GT $2.00 Sylvania 110% --- NOS (OB) yellow lettering
1 6AX4-GT $2.00 Sylvania 120% --- NOS (OB) yellow lettering - damaged box
1 6AX4-GT $2.00 Sylvania 120% --- NOS (OB) yellow lettering
1 6AX4-GT $2.00 Arcturus 110% --- NOS (OB) ---
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Amperex 110% --- NOS (OB) world logo
1 6AX4-GTB $4.00 Tung-Sol 120% --- NOS (OB) ---
1 6AX4-GTB $4.00 Tung-Sol 120% --- NOS (OB) ---
1 6AX4-GTB $4.00 Tung-Sol 115% --- NOS (OB) ---
1 6AX4-GTB $2.00 Tung-Sol 120% --- NOS (OB) ---
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 110% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 110% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 110% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base - damaged box
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering - button base - damaged box
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering - button base - water damaged box
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base - worn box
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering - button base - worn box
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 115% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 110% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 RCA 110% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering - worn box
1 6AX4-GTB $2.00 GE 130% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 120% --- NOS (OB) white lettering - water damaged box
1 6AX4-GTB $2.00 GE 115% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 110% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 110% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 110% --- NOS (OB) white lettering
1 6AX4-GTB $2.00 GE 110% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) yellow lettering - button base
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) yellow lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) yellow lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) yellow lettering
1 6AX4-GTB $2.00 Sylvania 115% --- NOS (OB) yellow lettering
1 6AX4-GTB $2.00 Sylvania 115% --- NOS (OB) yellow lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 115% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 110% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 110% --- NOS (OB) red lettering
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 Sylvania 120% --- NOS (OB) red lettering - button base
1 6AX4-GTB $2.00 Sylvania 110% --- NOS (OB) red lettering - button base - worn box
1 6AX4-GTB $2.00 Zenith 115% --- NOS (OB) ---
1 6AX4-GTB $2.00 Raytheon 120% --- NOS (OB) ---
1 6AX4-GTB $2.00 Raytheon 120% --- NOS (OB) ---
1 6AX4-GTB $2.00 Raytheon 120% --- NOS (OB) water damaged box
1 6AX4-GTB $2.00 Raytheon 110% --- NOS (OB) ---
1 6AX4-GTB $2.00 IEC 120% --- NOS (OB) ---
1 6AX4-GTB $2.00 Philco 120% --- NOS (OB) ---
1 6AX4-GTB $2.00 Magnavox 115% --- NOS (OB) ---
1 6AX4-GTB $1.00 Tung-Sol 120% --- used (rb) ---
1 6AX4-GTB $1.00 Tung-Sol 120% --- used (rb) ---
1 6AX4-GTB $1.00 RCA 110% --- used (rb) red lettering
1 6AX4-GTB $1.00 RCA 115% --- used (rb) red lettering
1 6AX4-GTB $1.00 RCA 110% --- used (rb) red lettering
1 6AX4-GTB $1.00 RCA 120% --- used (rb) button base
1 6AX4-GTB $1.00 GE 110% --- used (rb) white lettering
1 6AX4-GTB $1.00 Sylvania 115% --- used (rb) yellow lettering - button base
1 6AX4-GTB $1.00 Sylvania 120% --- used (rb) yellow lettering
1 6AX4-GTB $1.00 Westinghouse 110% --- used (rb) ---
1 6AX4-GTB $1.00 Raytheon 120% --- used (rb) ---
1 6AX4-GTB $1.00 Raytheon 120% --- used (rb) ---
1 6AX4-GTB $1.00 Hitachi 120% --- used (rb) ---
1 6AX4-GT $1.00 Tung-Sol 120% --- used (rb) ---
1 6AX4-GT $1.00 RCA 115% --- used (rb) silver lettering
1 6AX4-GT $1.00 RCA 120% --- used (rb) silver lettering
1 6AX4-GT $1.00 RCA 120% --- used (rb) silver lettering
1 6AX4-GT $1.00 GE 110% --- used (rb) white lettering
1 6AX4-GT $1.00 GE 110% --- used (rb) white lettering
1 6AX4-GT $1.00 GE 110% --- used (rb) white lettering
1 6AX4-GT $1.00 GE 110% --- used (rb) white lettering
1 6AX4-GT $1.00 GE 120% --- used (rb) white lettering
1 6AX4-GT $1.00 Sylvania 120% --- used (rb) yellow lettering
1 6AX4-GT $1.00 Sylvania 115% --- used (rb) yellow lettering
1 6AX4-GT $1.00 Sylvania 115% --- used (rb) yellow lettering
1 6AX4-GT $1.00 Westinghouse 110% --- used (rb) ---
1 6AX4-GT $1.00 Philco 120% --- used (rb) ---
1 6AX4-GT $1.00 Wards Super Airline 120% --- used (rb) ---
1 6AX4-GT $1.00 CBS / Hytron 110% --- used (rb) ---
1 6AX4-GT $1.00 Hytron 120% --- used (rb) ---
1 6AX4-GT $0.50 GE 100% --- used (rb) white lettering
1 6AX4-GT $0.50 Philco 100% --- used (rb) ---

Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box, (L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
(ST)=ST Style, (GT)=GT Style, (TT)=Tall Tubular, (M7)=7pin miniature, M9=9pin miniature, (SM)=subminiature, JAN = Military
Emission Strength = Percentage of emission measured on Eico 666 tube tester
(Emission Strength = 100% baseline reference, >80%:good, >60%:fair >40%=diode good).
Gm = Mutual conductance measured on Hickok 533 tube tester; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).


How To Order:

Purchasing our audio tubes is easy.
Just send us an email indicating the tubes (including quantities) you want.
We will let you know the total price including shipping and handling.

Shipping and Handling Information

Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.


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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com