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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 5U4-GB $15.00 IEC 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Hitachi 110% / 110% --- NOS (wb) cat:401-607
1 5U4-GB $15.00 Wards Super Airline 110% / 110% --- NOS (wb) cat:403-251
1 5U4-GB $15.00 CBS 110% / 110% --- NOS (wb) US Navy
1 5U4-GB $15.00 CBS 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 CBS 110% / 110% --- NOS (ob) worn box
1 5U4-GB $15.00 Truetone 110% / 110% --- NOS (ob) damaged box
1 5U4-GB $15.00 Channel Master 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Zenith 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Zenith 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Motorola 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Triad 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Silvertone 110% / 110% --- NOS (ob) Torn box flap
1 5U4-GB $15.00 Philco 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Delta 110% / 110% --- NOS (rb) ---
1 5U4-GB $15.00 Packard Bell 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Realistic 110% / 110% --- NOS (ob) damaged box
1 5U4-GB $15.00 Western Union 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 IBM 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Cornell 100% / 100% --- NOS (rb) cat:402-321
1 5U4-GB $15.00 Cornell 100% / 100% --- NOS (rb) cat:402-319
1 5U4-GB $15.00 Baldwin 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 B&K 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Silvertone 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Delco 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Zalytron 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (wb) ---
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (wb) jan
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (wb) cat:403-260
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (wb) jan
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (ob) --- (au6)
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (ob) --- (au6)
1 5U4-GB $15.00 Sylvania 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Sylvania 105% / 105% --- NOS (ob) ---
1 5U4-GB $15.00 Sylvania 105% / 105% --- NOS (wb) ---
1 5U4-GB $15.00 Sylvania 105% / 105% --- NOS (wb) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) cat:403-253-3
1 5U4-GB $15.00 GE 110% / 110% --- NOS (ob) torn box flap
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (OB) cat:402-318
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $15.00 Raytheon 110% / 110% --- NOS (ob) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 100% / 100% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $7.50 RCA 105% / 105% --- used (L) ---
1 5U4-GB $5.00 RCA 90% / 90% --- used (L) ---
1 5U4-GB $5.00 RCA 90% / 90% --- used (L) ---
1 5U4-GB $5.00 RCA 90% / 90% --- used (L) ---
1 5U4-GB $5.00 RCA 90% / 90% --- used (L) ---
1 5U4-GB $5.00 RCA 90% / 90% --- used (L) ---

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