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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 6AU5-GT $6.00 Amperex 120% 7500 / 5200 NOS (OB) ---
1 6AU5-GT $6.00 Tung-Sol 110% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $6.00 Tung-Sol 110% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 RCA 130% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 7500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 7500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 8000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 8000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 8500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 130% 8500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 7000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 100% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 120% 6500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 120% 6500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 120% 8500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 120% 7250 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 RCA 110% 7000 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 7000 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 7500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 6500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 8000 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 110% 5500 / 5200 NOS (OB) silver lettering
1 6AU5-GT $5.00 RCA 120% 6750 / 5200 NOS (OB) silver lettering - damaged box
1 6AU5-GT $5.00 GE 130% 7500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 6000 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 GE 120% 6500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 120% 6500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 7500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 GE 110% 6500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 120% 6500 / 5200 NOS (OB) red lettering
1 6AU5-GT $5.00 GE 120% 7000 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 110% 6500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 7500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 120% 7000 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 7500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 120% 6500 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 7000 / 5200 NOS (OB) white lettering
1 6AU5-GT $5.00 GE 130% 7000 / 5200 NOS (wb) white lettering
1 6AU5-GT $5.00 Sylvania 120% 6500 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 6000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7250 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 130% 7500 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 120% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 120% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 120% 7000 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 120% 6500 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 120% 6500 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 110% 6500 / 5200 NOS (OB) yellow lettering
1 6AU5-GT $5.00 Sylvania 110% 6500 / 5200 NOS (OB) green lettering
1 6AU5-GT $5.00 Philco 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Delco 130% 6000 / 5200 NOS (OB) water damaged box
1 6AU5-GT $5.00 Selectron 120% 6000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Dumont 120% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Dumont 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Westinghouse 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Westinghouse 120% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Westinghouse 120% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Westinghouse 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 120% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 130% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 130% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 110% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 Raytheon 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 CBS 120% 7000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 CBS 120% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 CBS 130% 6500 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 CBS 110% 6000 / 5200 NOS (OB) ---
1 6AU5-GT $5.00 CBS 140% 6000 / 5200 NOS (OB) ---
1 6AU5-GT $2.00 RCA 110% 7250 / 5200 used (OB) silver lettering
1 6AU5-GT $2.00 RCA 130% 7500 / 5200 used (rb) red lettering
1 6AU5-GT $2.00 RCA 120% 6500 / 5200 used (rb) red lettering
1 6AU5-GT $2.00 RCA 125% 7000 / 5200 used (rb) red lettering
1 6AU5-GT $2.00 RCA 110% 7000 / 5200 used (rb) red lettering
1 6AU5-GT $2.00 RCA 110% 6250 / 5200 used (rb) silver lettering
1 6AU5-GT $2.00 RCA 120% 7000 / 5200 used (rb) silver lettering
1 6AU5-GT $2.00 RCA 120% 6500 / 5200 used (rb) silver lettering
1 6AU5-GT $2.00 RCA 115% 6000 / 5200 used (rb) silver lettering
1 6AU5-GT $2.00 RCA 115% 6500 / 5200 used (rb) silver lettering
1 6AU5-GT $2.00 Raytheon 120% 6500 / 5200 used (OB) ---
1 6AU5-GT $2.00 Hewlett Packard 120% 6500 / 5200 used (rb) ---
1 6AU5-GT $2.00 Cornell 110% 6500 / 5200 used (rb) ---
1 6AU5-GT $2.00 Cornell 120% 6500 / 5200 used (rb) ---
1 6AU5-GT $2.00 Cornell 115% 6500 / 5200 used (rb) ---
1 6AU5-GT $2.00 Silvertone 110% 6000 / 5200 used (rb) ---
1 6AU5-GT $2.00 Westinghouse 110% 6500 / 5200 used (wb) ---
1 6AU5-GT $2.00 Tung-Sol 110% 6500 / 5200 used (rb) ---
1 6AU5-GT $2.00 Sylvania 120% 6000 / 5200 used (rb) yellow lettering
1 6AU5-GT $2.00 Silvertone 120% 7500 / 5200 used (rb) ---
1 6AU5-GT $1.50 Hoffman 100% 7500 / 5200 used (rb) ---
1 6AU5-GT $1.50 Packard Bell 100% 7000 / 5200 used (rb) ---
1 6AU5-GT $1.50 Packard Bell 105% 6000 / 5200 used (rb) ---
1 6AU5-GT $1.50 Silvertone 100% 6000 / 5200 used (rb) ---
1 6AU5-GT $1.50 RCA 100% 6050 / 5200 used (OB) silver lettering
1 6AU5-GT $1.50 GE 100% 6000 / 5200 used (OB) white lettering
1 6AU5-GT $1.00 Philco 140% 5000 / 5200 used (OB) ---
1 6AU5-GT $1.00 RCA 110% 5500 / 5200 used (OB) silver lettering
1 6AU5-GT $1.00 Raytheon 100% 5500 / 5200 used (OB) ---
1 6AU5-GT $1.00 Tung-Sol 100% 5200 / 5200 used (ob) ---
1 6AU5-GT $1.00 Sylvania 120% 5500 / 5200 used (ob) yellow lettering
1 6AU5-GT $1.00 Sylvania 100% 5200 / 5200 used (ob) yellow lettering
1 6AU5-GT $1.00 Sylvania 100% 5200 / 5200 used (ob) yellow lettering
1 6AU5-GT $1.00 CBS 130% 7500 / 5200 used (L) ---
1 6AU5-GT $1.00 RCA 100% 5500 / 5200 used (L) silver lettering
1 6AU5-GT $1.00 RCA 110% 6000 / 5200 used (L) silver lettering
1 6AU5-GT $1.00 RCA 110% 6000 / 5200 used (L silver lettering
1 6AU5-GT $1.00 RCA 100% 6000 / 5200 used (L) silver lettering
1 6AU5-GT $1.00 GE 110% 6000 / 5200 used (L) red lettering
1 6AU5-GT $1.00 Sylvania 100% 6250 / 5200 used (L) yellow lettering
1 6AU5-GT $1.00 Raytheon 100% 6000 / 5200 used (L) ---
1 6AU5-GT $0.50 RCA 90% 5500 / 5200 used (rb) silver lettering
1 6AU5-GT $0.50 Pacific Mercury 90% 7000 / 5200 used (rb) ---
1 6AU5-GT $0.50 Cornell 90% 5000 / 5200 used (rb) ---
1 6AU5-GT $0.50 Sylvania 130% 6000 / 5200 used leaky (1M) (ob) yellow lettering

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