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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 6BL7-GT $50.00 Sylvania 110% / 110% 6250: 6000 / 5000 NOS (OB) grid 'c' clips - green lettering - large rectangular plates - mica getter shield
1 6BL7-GT $20.00 Tung-Sol 140% / 120% 6500: 6250 / 5000 used (rb) grid clips - large rectangular plates
1 6BL7-GT $18.00 Sylvania 130% / 130% 6000: 6250 / 5000 used (rb) grid clips - large rectangular plates - green lettering
1 6BL7-GT $18.00 Sylvania 115% / 115% 5300: 5600 / 5000 used (rb) grid 'c' clips - large rectangular plates - green lettering - mica getter shield
1 6BL7-GT $15.00 Video 120% / 130% 6000: 6500 / 5000 used (rb) grid 'c' clips - large rectangular plates - mica getter shield
1 6BL7-GT $15.00 Micro 115% / 115% 5800: 5600 / 5000 used (wb) grid 'c' clips - large rectangular plates - mica getter shield
1 6BL7-GT $12.00 Stromberg Carlson 100% / 100% 6000: 6000 / 5000 used (rb) grid 'c' clips - large rectangular plates - mica getter shield
1 6BL7-GT $12.00 Sylvania 100% / 100% 4600: 4500 / 5000 used (rb) grid 'c' clips - large rectangular plates - green lettering - mica getter shield
1 6BL7-GT $10.00 Sylvania 100% / 90% 4600: 4400 / 5000 used (rb) grid 'c' clips - large rectangular plates - green lettering
1 6BL7-GT $10.00 Zenith 100% / 90% 5400: 5000 / 5000 used (wb) grid 'c' clips - large rectangular plates
1 6BL7-GT $15.00 Tung-Sol 120% / 120% 6000: 6000 / 5000 NOS (OB) grid clips
1 6BL7-GTA $15.00 Tung-Sol 120% / 120% 6000: 6000 / 5000 NOS (OB) grid clips
1 6BL7-GTA $15.00 Tung-Sol 125% / 120% 6000: 6250 / 5000 NOS (OB) grid clips
1 6BL7-GTA $15.00 Tung-Sol 130% / 130% 6000: 6000 / 5000 NOS (OB) grid clips
1 6BL7-GTA $15.00 Tung-Sol 130% / 125% 6250: 6000 / 5000 NOS (OB) grid clips
1 6BL7-GTA $12.00 RCA 110% / 110% 6250: 6000 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GT $12.00 RCA 120% / 120% 5500: 5800 / 5000 NOS (wb) grid clips - white lettering - mica getter shield
1 6BL7-GT $12.00 RCA 120% / 110% 6000: 5750 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GTA $12.00 RCA 140% / 140% 7000: 7000 / 5000 NOS (OB) grid clips - white lettering - torn box flap - mica getter shield
1 6BL7-GTA $12.00 RCA 130% / 140% 6500: 7000 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $12.00 RCA 110% / 120% 5500: 5800 / 5000 NOS (OB) red lettering
1 6BL7-GTA $12.00 RCA 110% / 120% 5650: 5800 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GTA $12.00 RCA 110% / 120% 5400: 5800 / 5000 NOS (OB) red lettering
1 6BL7-GTA $12.00 RCA 110% / 110% 6000: 6000 / 5000 NOS (OB) red lettering
1 6BL7-GTA $12.00 RCA 120% / 120% 5600: 5800 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GTA $12.00 RCA 120% / 115% 5400: 5200 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GT $10.00 Raytheon 110% / 110% 5400: 5600 / 5000 NOS (OB) grid clips
1 6BL7-GTA $10.00 Raytheon 110% / 110% 5500: 5500 / 5000 NOS (OB) grid clips
1 6BL7-GTA $8.00 GE 110% / 115% 6000: 6000 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GTA $8.00 GE 120% / 120% 6500: 6750 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 120% / 120% 6750: 6750 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 110% / 110% 6250: 6250 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 120% / 120% 6500: 6250 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 130% / 120% 7000: 6750 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 130% / 120% 6000: 6000 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 130% / 120% 6250: 6250 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 130% / 130% 6500: 6500 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 130% / 130% 7000: 7250 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 120% / 120% 6250: 6500 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GTA $8.00 GE 120% / 130% 6000: 6500 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GT $8.00 GE 110% / 115% 6500: 6500 / 5000 NOS (OB) grid clips - white lettering - torn box flap
1 6BL7-GT $8.00 GE 130% / 110% 6500: 6000 / 5000 NOS (OB) grid clips - white lettering
1 6BL7-GT $8.00 Sylvania 110% / 110% 5500: 5500 / 5000 NOS (OB) grid clips - yellow lettering - mica getter shield
1 6BL7-GT $8.00 Sylvania 120% / 120% 6000: 6000 / 5000 NOS (wb) grid clips - yellow lettering - mica getter shield
1 6BL7-GTA $8.00 Sylvania 120% / 120% 6500: 7000 / 5000 NOS (OB) grid clips - yellow lettering
1 6BL7-GTA $8.00 Sylvania 120% / 115% 6000: 5800 / 5000 NOS (OB) grid clips - red lettering
1 6BL7-GTA $8.00 Sylvania 130% / 130% 7000: 7000 / 5000 NOS (OB) grid clips - yellow lettering - mica getter shield
1 6BL7-GT $8.00 Sylvania 110% / 110% 5400: 5500 / 5000 NOS (OB) grid clips - green lettering - mica getter shield
1 6BL7-GT $8.00 Sylvania 110% / 110% 5500: 5600 / 5000 NOS (OB) grid clips - green lettering - mica getter shield
1 6BL7-GT $8.00 Sylvania 110% / 120% 5800: 6000 / 5000 NOS (wb) grid clips - green lettering - mica getter shield
1 6BL7-GTA $8.00 Arcturus 130% / 125% 5800: 5800 / 5000 NOS (OB) grid clips
1 6BL7-GTA $8.00 Arcturus 120% / 120% 6500: 6500 / 5000 NOS (OB) grid clips - mica getter shield
1 6BL7-GTA $8.00 CBS / Hytron 130% / 120% 7000: 6750 / 5000 NOS (OB) grid clips
1 6BL7-GT $8.00 CBS 140% / 130% 7000: 6500 / 5000 NOS (OB) grid clips
1 6BL7-GTA $8.00 Motorola 110% / 110% 5500: 5400 / 5000 NOS (OB) grid clips
1 6BL7-GTA $8.00 Motorola 130% / 130% 6750: 6750 / 5000 NOS (OB) grid clips
1 6BL7-GTA $4.00 GE 100% / 120% 4600: 4800 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 GE 140% / 140% 6750: 7000 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 GE 110% / 120% 5400: 6000 / 5000 used (rb) grid clips - white lettering
1 6BL7-GTA $4.00 GE 120% / 120% 5700: 6000 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 GE 110% / 110% 6000: 6250 / 5000 used (rb) grid clips - red lettering
1 6BL7-GTA $4.00 GE 120% / 130% 6000: 6250 / 5000 used (rb) grid clips - red lettering
1 6BL7-GTA $4.00 GE 100% / 100% 6000: 6500 / 5000 used (rb) grid clips - red lettering
1 6BL7-GTA $4.00 GE 120% / 130% 6250: 7000 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 GE 100% / 110% 5000: 5800 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 GE 120% / 130% 6250: 6500 / 5000 used (wb) grid clips - white lettering
1 6BL7-GTA $4.00 GE 140% / 130% 7000: 6250 / 5000 used (ob) grid clips - yellow lettering - mica getter shield
1 6BL7-GT $4.00 GE 125% / 120% 5500: 5500 / 5000 used (ob) grid clips - white lettering
1 6BL7-GTA $4.00 Raytheon 120% / 130% 5500: 6500 / 5000 used (ob) grid clips
1 6BL7-GT $4.00 Raytheon 130% / 130% 6000: 6000 / 5000 used (ob) grid clips - mica getter shield
1 6BL7-GTA $4.00 RCA 120% / 110% 7000: 7000 / 5000 used (wb) grid clips - white lettering - mica getter shield
1 6BL7-GTA $4.00 RCA 90% / 90% 5000: 4900 / 5000 used (ob) grid clips - white lettering - mica getter shield
1 6BL7-GTA $4.00 RCA 100% / 130% 5500: 7000 / 5000 used (wb) grid clips - white lettering - mica getter shield
1 6BL7-GTA $4.00 RCA 120% / 130% 5600: 6000 / 5000 used (ob) grid clips - red lettering
1 6BL7-GTA $4.00 RCA 110% / 100% 5200: 5000 / 5000 used (rb) grid clips - red lettering
1 6BL7-GTA $4.00 RCA 120% / 120% 5500: 5500 / 5000 used (ob) grid clips - red lettering
1 6BL7-GTA $4.00 RCA 110% / 100% 5400: 4600 / 5000 used (ob) grid clips - red lettering - mica getter shield
1 6BL7-GTA $4.00 RCA 110% / 110% 5800: 5400 / 5000 used (wb) grid clips - red lettering
1 6BL7-GTA $4.00 RCA 120% / 125% 5600: 5900 / 5000 used (rb) red lettering
1 6BL7-GTA $4.00 RCA 120% / 120% 6000: 6000 / 5000 used (wb) button base
1 6BL7-GTA $4.00 Sylvania 110% / 110% 5400: 5200 / 5000 used (ob) grid clips - red lettering
1 6BL7-GTA $4.00 Sylvania 100% / 120% 5300: 5900 / 5000 used (rb) grid clips - yellow lettering - mica getter shield
1 6BL7-GTA $4.00 Sylvania 120% / 130% 6500: 7500 / 5000 used (rb) grid clips - yellow lettering
1 6BL7-GT $4.00 Sylvania 120% / 100% 5800: 5400 / 5000 used (wb) grid clips - green lettering
1 6BL7-GT $4.00 Emerson 110% / 110% 5500: 5500 / 5000 used (rb) grid clips - mica getter shield
1 6BL7-GT $4.00 Philco 120% / 90% 6000: 5000 / 5000 used (rb) grid clips - mica getter shield
1 6BL7-GTA $4.00 Curtis Mathis 110% / 110% 4500: 4900 / 5000 used (rb) grid clips - mica getter shield
1 6BL7-GT $4.00 Motorola 90% / 100% 4600: 4800 / 5000 used (rb) grid clips - mica getter shield
1 6BL7-GTA $4.00 Tung-Sol 90% / 100% 4200: 4600 / 5000 used (rb) grid clips
1 6BL7-GTA $4.00 Westinghouse 110% / 130% 5750: 6500 / 5000 used (rb) grid clips
1 6BL7-GT $4.00 Westinghouse 100% / 105% 5200: 5400 / 5000 used (rb) grid clips - mica getter shield
1 6BL7-GTA $4.00 Zenith 100% / 100% 4800: 4800 / 5000 used (ob) grid clips
1 6BL7-GTA $4.00 Raytheon 110% / 90% 5000: 4500 / 5000 used (L) grid clips
1 6BL7-GT $4.00 GE 100% / 90% 5000: 3600 / 5000 used (L) grid clips - white lettering
1 6BL7-GTA $4.00 GE 110% / 90% 6000: 5000 / 5000 used (L) grid clips - white lettering
1 6BL7-GT $4.00 RCA 110% / 90% 5500: 4000 / 5000 used (L) grid clips - white lettering
1 6BL7-GTA $4.00 RCA 90% / 110% 4800: 5400 / 5000 used (L) button base
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - red lettering - ge
1 6BX7-GT $25.00 RCA 130% / 140% 7500: 8500 / 5000 NOS (OB) grid clips - red lettering
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - red lettering
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 7750 / 5000 NOS (OB) button base - red lettering
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 7500 / 5000 NOS (wb) button base - red lettering
1 6BX7-GT $25.00 RCA 130% / 130% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering - ge
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $25.00 RCA 120% / 120% 7500: 8000 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $25.00 RCA 140% / 140% 8000: 7750 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 120% / 120% 7000: 7000 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 120% / 125% 7750: 8000 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 140% / 140% 8000: 8250 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 130% / 135% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 130% / 130% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 110% / 110% 7500: 7500 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 140% / 140% 9000: 9250 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 130% / 140% 7500: 8000 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 GE 120% / 130% 7000: 7000 / 5000 NOS (OB) grid clips - white lettering
1 6BX7-GT $20.00 Dumont 140% / 140% 8000: 7750 / 5000 NOS (OB) grid clips
1 6BX7-GT $20.00 Dumont 140% / 140% 8000: 8250 / 5000 NOS (OB) grid clips - missing box flap - mica getter sheild
1 6BX7-GT $20.00 CBS 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - ge
1 6BX7-GT $20.00 Motorola 120% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - missing box flap - ge
1 6BX7-GT $20.00 Western Union 130% / 130% 8000: 8000 / 5000 NOS (OB) grid clips - ge
1 6BX7-GT $20.00 Sylvania 140% / 140% 8000: 8000 / 5000 NOS (OB) grid clips - yellow lettering - mica getter sheild
1 6BX7-GT $20.00 Sylvania 130% / 135% 8000: 8000 / 5000 NOS (OB) grid clips - yellow lettering - mica getter shield
1 6BX7-GT $20.00 Raytheon 140% / 140% 8000: 8000 / 5000 NOS (OB) grid clips - mica getter sheild
1 6BX7-GT $20.00 Raytheon 110% / 120% 7500: 7500 / 5000 NOS (OB) grid clips - ge
1 6BX7-GT $20.00 Raytheon 140% / 130% 7500: 7750 / 5000 NOS (OB) grid clips - ge
1 6BX7-GT $20.00 Raytheon 120% / 120% 7500: 7750 / 5000 NOS (OB) grid clips - ge
1 6BX7-GT $8.00 RCA 100% / 100% 6500: 6250 / 5000 used (rb) grid clips - red lettering
1 6BX7-GT $8.00 GE 140% / 140% 9500: 9500 / 5000 used (rb) grid clips - white lettering
1 6BX7-GT $8.00 GE 120% / 130% 7000: 7500 / 5000 used (rb) grid clips - white lettering
1 6BX7-GT $8.00 GE 125% / 110% 7750: 7500 / 5000 used (rb) grid clips - red lettering
1 6BX7-GT $8.00 Sylvania 130% / 130% 7500: 8000 / 5000 used (ob) grid clips - yellow lettering - ge
1 6BX7-GT $8.00 Raytheon 130% / 120% 7250: 6750 / 5000 used (rb) grid clips - mica getter shield
1 6BX7-GT $8.00 Raytheon 100% / 100% 7000: 7000 / 5000 used (rb) grid clips - ge
1 6BX7-GT $4.00 GE 130% / 90% 7500: 7000 / 5000 used (L) grid clips - white lettering
1 6BX7-GT $4.00 GE 90% / 90% 5500: 6000 / 5000 used (L) grid clips - white 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