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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 17AV5 $2.50 Sylvania 130% 4800 / 3900Gm NOS (OB) yellow lettering
1 17AV5 $2.50 Rauland 120% 4400 / 3900Gm NOS (OB) water damaged box
1 19GB6-G $5.00 RCA 130% 7500 / 6000Gm NOS (OB) silver lettering - grid clip - dual bottom 'D' getters - ceramic spacers - damaged box
1 19BG6-G $5.00 CBS / Hytron 130% 8500 / 6000Gm NOS (OB) grid clip - dual bottom 'D' getters - ceramic spacers (cat:402-357)
1 19BG6-G $5.00 CBS / Hytron 120% 7500 / 6000Gm NOS (OB) dual side 'D' getters - ceramic spacers (cat:402-365)
1 19BG6-G $5.00 GE 130% 7000 / 6000Gm NOS (OB) white lettering - grid clip - dual bottom 'D' getters - ceramic spacers - box flap missing
1 19BG6-G $5.00 National Union 130% 8000 / 6000Gm NOS (OB) grid clip - dual bottom 'D' getters - ceramic spacers - damaged box (cat:402-399)
1 19BG6-G $5.00 National Union 140% 7500 / 6000Gm NOS (OB) grid clip - dual bottom 'D' getters - ceramic spacers - damaged box (cat:402-399-1)
1 19BG6-G $2.50 GE 130% 5000 / 6000Gm used (L) white lettering - grid clip - dual bottom 'D' getters - ceramic spacers
1 19BG6-G $2.50 GE 130% 6500 / 6000Gm used (L) white lettering - grid clip - dual bottom 'D' getters - ceramic spacers
1 19BG6-G $2.50 Wards Airline 140% 7000 / 6000Gm used (L) grid clip - bottom 'D' getter
1 19BG6-G $2.50 Zenith 100% 6000 / 6000Gm used (L) grid clip - dual bottom 'D' getters - ceramic spacers (cat:402-127)
1 19BG6-G $2.50 Sylvania 140% 7500 / 6000Gm used (L) grid clip - single bottom 'D' getter (au48)
1 19BG6-G $2.50 CBS / Hytron 100% 7500 / 6000Gm used (L) grid clip - dual bottom 'D' getters - ceramic spacers (au48)
1 19BG6-GA $4.00 Raytheon 110% 7500 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 19BG6-GA $4.00 Sylvania 140% 8000 / 6000Gm NOS (OB) yellow lettering - grid clip - dual side 'D' getters - screen grid fins
1 19BG6-GA $4.00 Westinghouse 130% 7500 / 6000Gm NOS (OB) grid clip - dual side 'D' getters - screen grid fins - water damaged box
1 19BG6-GA $4.00 Rauland 130% 7500 / 6000Gm NOS (OB) grid clip - dual side 'D' getters - worn box
1 19BG6-GA $4.00 GE 110% 7000 / 6000Gm NOS (OB) grid clip - dual side 'D' getters (au48)
1 19BG6-GA $2.00 Sylvania 120% 7500 / 6000Gm used (OB) grid clip - dual side 'D' getters (cat:402-425)
1 19BG6-GA $2.00 Sylvania 120% 8500 / 6000Gm used (OB) grid clip - side halo getter - screen grid fins
1 19BG6-GA $2.00 Sylvania 110% 8500 / 6000Gm used (OB) grid clip - side halo getter - screen grid fins - damaged box (au48)
1 21EX6 $5.00 GE 120% 7500 / 6000Gm NOS (OB) white lettering - grid clip - dual side 'D' getters - screen grid fins
1 21EX6 $2.50 Raythoen 110% 7500 / 6000Gm used (rb) grid clip - dual side 'D' getters - screen grid fins
1 25DN6 $2.00 RCA 130% 6500 / 6000Gm NOS (OB) red lettering - side halo getter (cat:403-219)
1 25DN6 $2.00 RCA 120% 7000 / 6000Gm NOS (OB) red lettering - side halo getter - screen grid fins
1 25DN6 $2.00 RCA 130% 6500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 140% 7000 / 6000Gm NOS (OB) red lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 RCA 120% 6500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 130% 8000 / 6000Gm NOS (OB) red lettering - top halo getter - screen grid fins
1 25DN6 $2.00 RCA 140% 6500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 130% 7500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 130% 6500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 130% 7500 / 6000Gm NOS (OB) red lettering - side halo getter
1 25DN6 $2.00 RCA 130% 6500 / 6000Gm NOS (OB) red lettering - dual side 'D' getters - grid clip (cat:403-220-2)
1 25DN6 $2.00 Sylvania 140% 6500 / 6000Gm NOS (OB) yellow lettering - dual side halo getters - grid clip - screen grid fins
1 25DN6 $2.00 Sylvania 140% 6500 / 6000Gm NOS (OB) yellow lettering - dual side halo getters - grid clip - screen grid fins
1 25DN6 $2.00 Sylvania 140% 8000 / 6000Gm NOS (OB) yellow lettering - side halo getter - grid clip - screen grid fins
1 25DN6 $2.00 Sylvania 140% 8000 / 6000Gm NOS (OB) yellow lettering - dual side halo getters - grid clip - screen grid fins - damaged box
1 25DN6 $2.00 Sylvania 130% 7000 / 6000Gm NOS (OB) yellow lettering - dual side 'D' getters - grid clip - screen grid fins - damaged box
1 25DN6 $2.00 Sylvania 120% 7000 / 6000Gm NOS (OB) yellow lettering - side 'D' getter - grid clip
1 25DN6 $2.00 Sylvania 140% 6500 / 6000Gm NOS (OB) red lettering - side halo getter - grid clip - screen grid fins
1 25DN6 $2.00 Sylvania 130% 7000 / 6000Gm NOS (OB) yellow lettering - dual side halo getters - grid clip - screen grid fin
1 25DN6 $2.00 Sylvania 130% 6500 / 6000Gm NOS (OB) red lettering - dual side halo getters - grid clip - screen grid fin - torn box flap
1 25DN6 $2.00 Sylvania 140% 7000 / 6000Gm NOS (OB) yellow lettering - dual side halo getters - grid clip - screen grid fin
1 25DN6 $2.00 GE 130% 7000 / 6000Gm NOS (OB) white lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 GE 130% 6500 / 6000Gm NOS (OB) white lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 GE 130% 6500 / 6000Gm NOS (OB) white lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 GE 140% 6500 / 6000Gm NOS (OB) white lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 GE 140% 7000 / 6000Gm NOS (OB) white lettering - dual side 'D' getters - grid clip
1 25DN6 $2.00 GE 120% 7500 / 6000Gm NOS (OB) white lettering - dual side halo getters - grid clip
1 25DN6 $2.00 Raytheon 130% 7500 / 6000Gm NOS (OB) dual side 'D' getters - grid clip
1 25DN6 $2.00 Raytheon 130% 6500 / 6000Gm NOS (OB) dual side 'D' getters - grid clip (cat:403-35)
1 25DN6 $2.00 Raytheon 130% 7000 / 6000Gm NOS (OB) side 'D' getter - grid clip
1 25DN6 $2.00 Raytheon 140% 6500 / 6000Gm NOS (OB) dual side halo getters - grid clip - screen grid fin
1 25DN6 $2.00 Raytheon 140% 7500 / 6000Gm NOS (OB) top 'D' getter - grid clip - screen grid fins
1 25DN6 $2.00 Raytheon 130% 6500 / 6000Gm NOS (OB) top dual halo getters - grid clip - screen grid fins
1 25DN6 $2.00 Rauland 140% 6500 / 6000Gm NOS (OB) dual side 'D' getters - grid clip - screen grid fins
1 25DN6 $1.00 Sylvania 140% 8000 / 6000Gm used (OB) side halo getter - grid clip - screen grid fins (cat:401-577)
1 25DN6 $1.00 Sylvania 140% 7500 / 6000Gm used (OB) dual top 'D' getters - screen grid fins
1 25DQ6 $3.00 Raytheon 120% 8500 / 6000Gm used (OB) grid clip - side 'D' getter - black plate
1 25EC6 $5.00 Tung-Sol 110% 6500 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 25EC6 $5.00 Tung-Sol 120% 7000 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 25EC6 $5.00 RCA 120% 7000 / 6000Gm NOS (OB) red lettering - grid clip - dual side 'D' getters
1 25EC6 $5.00 Raytheon 120% 7000 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 25EC6 $5.00 Raytheon 120% 7000 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 25EC6 $5.00 Rauland 120% 7500 / 6000Gm NOS (OB) grid clip - dual side 'D' getters
1 25EC6 $5.00 GE 130% 7500 / 6000Gm NOS (OB) white lettering - grid clip - dual side 'D' getters
1 25EC6 $5.00 GE 120% 7500 / 6000Gm NOS (OB) white lettering - grid clip - dual side 'D' getters
1 26HU5 $15.00 RCA 120% 6500 / 6000Gm NOS (OB) red lettering - dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 RCA 130% 6500 / 6000Gm NOS (OB) red lettering - dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 RCA 120% 6500 / 6000Gm NOS (OB) red lettering - dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 RCA 120% 6000 / 6000Gm NOS (OB) red lettering - top halo getter + dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 RCA 120% 6500 / 6000Gm NOS (OB) red lettering - top halo getter + dual side halo getters - 26LX6 with octal base - water damaged box (au59)
1 26HU5 $15.00 Sylvania 120% 6000 / 6000Gm NOS (OB) yellow lettering - top halo getter + dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 Sylvania 120% 6500 / 6000Gm NOS (OB) yellow lettering - dual top halo getters - 26LX6 with octal base (au59)
1 26HU5 $15.00 Westinghouse 130% 6000 / 6000Gm NOS (OB) grid clip - dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $5.00 GE 120% 6500 / 6000Gm used (L) white lettering - dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $5.00 GE 130% 6500 / 6000Gm used (L) white lettering - dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $5.00 GE 120% 6500 / 6000Gm used (L) white lettering - dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $5.00 GE 130% 6500 / 6000Gm used (L) dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $5.00 GE 120% 6000 / 6000Gm used (L) white lettering - dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $5.00 unknown 120% 6500 / 6000Gm used (rb) dual side halo getters - 26LX6 with octal base (au59)
1 26HU5 $5.00 unknown 120% 6500 / 6000Gm used (L) dual top halo getters - 26LX6 with octal base (au31)
1 26HU5 $2.50 GE 120% 6500 / 6000Gm used (L) white lettering - dual top halo getters - 26LX6 with octal base - loose cap (au31)
1 26HU5 $0.50 GE 60% 20dmc used (L) white lettering - dual top halo getters - 26LX6 with octal base (au31)

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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Don't forget to visit our
Discount Bargain Packs
and
Bargain Bin
for more savings!



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MDB Ventures Home

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