Welcome to MDB Ventures
Audio Tube Store


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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 6GL7 $5.00 Sylvania 130% / 120% 1400:1000 / 8500:6600Gm NOS (OB) ---
1 6GL7 $2.00 Zenith 110% / 120% 1350:1000 / 7750:6600Gm used (rb) ---
1 10EG7 $3.00 Tung-Sol 120% / 110% 2300:2000 / 8000:7500Gm NOS (OB) ---
1 10EG7 $3.00 Tung-Sol 120% / 110% 2600:2000 / 8500:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 120% / 120% 3000:2000 / 8500:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 110% / 130% 2750:2000 / 8000:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 120% / 110% 2400:2000 / 8000:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 120% / 120% 3000:2000 / 8500:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 130% / 120% 2500:2000 / 8500:7500Gm NOS (OB) ---
1 10EG7 $2.50 RCA 120% / 120% 2500:2000 / 8000:7500Gm NOS (OB) ---
1 10EG7 $2.50 Raytheon 110% / 130% 2750:2000 / 8000:7500Gm NOS (OB) ---
1 10EG7 $2.50 Sylvania 120% / 110% 2350:2000 / 8500:7500Gm NOS (OB) ---
1 10EG7 $2.50 GE 120% / 130% 2700:2000 / 8000:7500Gm NOS (OB) ---
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