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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 6F6 / VT-66 $12.50 RCA 130% 2600 / 2000Gm NOS (wb) metal tube - JAN
1 6F6 / VT-66 $12.50 RCA 125% 2450 / 2000Gm NOS (ob) metal tube - US Army
1 6F6 / VT-66 $12.50 RCA 120% 2350 / 2000Gm NOS (ob) metal tube - US Army - sealed in box
1 6F6 / VT-66 $12.00 GE 120% 2350 / 2000Gm NOS (ob) metal tube - US Navy - sealed in box
1 6F6 / VT-66 $12.00 GE 120% 2250 / 2000Gm NOS (ob) metal tube - US Navy - sealed in box
1 6F6 / VT-66 $12.00 GE 120% 2300 / 2000Gm NOS (ob) metal tube - US Navy - sealed in box
1 6F6 / VT-66 $12.50 Ken-Rad for Bendix untested heater ok NOS (OB) metal tube - US Army - sealed in box
1 6F6 / VT-66 $12.50 Ken-Rad for Bendix untested heater ok NOS (OB) metal tube - US Army - sealed in box
1 6F6 / VT-66 $12.00 Ken-Rad for Bendix 120% 2400 / 2000Gm NOS (OB) metal tube - US Army - damaged box
1 6F6 / VT-66 $12.00 Ken-Rad for Bendix 120% 2400 / 2000Gm NOS (OB) metal tube - US Army - damaged box
1 6F6 $10.00 Ken-Rad 115% 2300 / 2000Gm NOS (wb) metal tube
1 6F6 $10.00 CBS 120% 2250 / 2000Gm NOS (wb) metal tube
1 6F6 $10.00 Philco 125% 2400 / 2000Gm NOS (wb) metal tube
1 6F6 $10.00 Philco 125% 2400 / 2000Gm NOS (wb) metal tube
1 6F6* $12.00 RCA 130% 2600 / 2000Gm NOS (ob) metal tube
1 6F6 $12.00 RCA 115% 2300 / 2000Gm NOS (wb) metal tube
1 6F6 $12.00 GE 120% 2500 / 2000Gm NOS (OB) metal tube
1 6F6 $12.00 GE 125% 2650 / 2000Gm NOS (wb) metal tube
1 6F6 $12.00 Arcturus 120% 2500 / 2000Gm NOS (OB) metal tube - damaged box
1 6F6 $12.00 RCA 120% 2500 / 2000Gm NOS (OB) metal tube
1 6F6 / VT-66 $7.50 Ken-Rad 110% 2400 / 2000Gm used (wb) metal tube - JAN
1 6F6 / VT-66 $7.50 RCA 120% 2450 / 2000Gm used (rb) metal tube - JAN
1 6F6 / VT-66 $7.50 RCA 115% 2250 / 2000Gm used (rb) metal tube - JAN
1 6F6 / VT-66 $5.00 RCA 130% 2400 / 2000Gm used (ob) metal tube - some rust around base - US Army
1 6F6 / VT-66 $5.00 RCA 120% 2400 / 2000Gm used (ob) metal tube - some rust around base - US Army
1 6F6 / VT-66 $5.00 RCA 125% 2500 / 2000Gm used (ob) metal tube - minor rust - US Army
1 6F6 / VT-66 $5.00 RCA 120% 2150 / 2000Gm used (ob) metal tube - minor rust - US Army
1 6F6 / VT-66 $5.00 Ken-Rad 130% 2500 / 2000Gm used (L) metal tube
1 6F6 / VT-66 $5.00 Ken-Rad 110% 2150 / 2000Gm used (L) metal tube
1 6F6 $7.00 GE 100% 2100 / 2000Gm used (ob) metal tube
1 6F6 $7.50 RCA 150% 2700 / 2000Gm used (rb) metal tube
1 6F6 $7.50 RCA 120% 2250 / 2000Gm used (ob) metal tube
1 6F6 $7.50 RCA 115% 2200 / 2000Gm used (rb) metal tube
1 6F6 $7.50 National Union 110% 2450 / 2000Gm used (rb) metal tube
1 6F6 $7.50 Sylvania 120% 2600 / 2000Gm used (rb) metal tube
1 6F6 $7.50 RCA 115% 2350 / 2000Gm used (wb) metal tube
1 6F6 $7.50 Philco 110% 2200 / 2000Gm used (wb) metal tube
1 6F6 $5.00 Ken-Rad 100% 2250 / 2000Gm used (wb) metal tube
1 6F6 $5.00 Wards Super Airline 100% 2200 / 2000Gm used (wb) metal tube
1 6F6 $7.50 RCA 115% 2350 / 2000Gm used (L) metal tube
1 6F6 $7.50 Sylvania 120% 2350 / 2000Gm used (L) metal tube
1 6F6 $7.50 Ken-Rad 120% 2400 / 2000Gm used (L) metal tube - minor rust on tube
1 6F6 $7.50 National Union 130% 2500 / 2000Gm used (L) metal tube
1 6F6 $7.50 RCA 110% 2400 / 2000Gm used (L) metal tube
1 6F6 $7.50 RCA 120% 2200 / 2000Gm used (L) metal tube
1 6F6 $7.00 GE 120% 2500 / 2000Gm used (L) metal tube
1 6F6 $7.00 Sylvania 115% 2400 / 2000Gm used (L) metal tube
1 6F6 $7.00 Sylvania 110% 2400 / 2000Gm used (L) metal tube
1 6F6 $7.00 Wards Airline 115% 2400 / 2000Gm used (L) metal tube
1 6F6 $7.00 Wards Super Airline 125% 2600 / 2000Gm used (L) metal tube
1 6F6 $7.00 Firestone Air Chief 130% 2600 / 2000Gm used (L) metal tube
1 6F6 $7.00 Raytheon 120% 1900 / 2000Gm used (L) metal tube
1 6F6 $5.00 Wards Airline 100% 2400 / 2000Gm used (L) metal tube
1 6F6 $5.00 National Union 100% 2000 / 2000Gm used (L) metal tube
1 6F6 $5.00 National Union 100% 2100 / 2000Gm used (L) metal tube
1 6F6 $5.00 Philco 100% 2200 / 2000Gm used (ob) metal tube
1 6F6 / VT-66 $5.00 Ken-Rad 110% 2200 / 2000Gm used (L) metal tube - JAN
1 6F6 / VT-66 $5.00 GE 130% 2600 / 2000Gm used (L) metal tube
1 6F6 / VT-66 $5.00 GE 130% 2350 / 2000Gm used (L) metal tube
1 6F6 / VT-66 $5.00 RCA 120% 2350 / 2000Gm used (L) metal tube - JAN
1 6F6-G / VT-66-A $40.00 RCA 120% 2300 / 2000Gm NOS (OB) gray coat - torn box flap
1 6F6-G $35.00 National Union 130% 2500 / 2000Gm NOS (wb) engraved base - ribbed black plate
1 6F6-G $35.00 Ceco 140% 2700 / 2000Gm NOS (wb) gray coat
1 6F6-G $20.00 Sparton 100% 2100 / 2000Gm used (L) cat:401-93 engraved base
1 6F6-G $20.00 National Union 110% 2200 / 2000Gm used (L) ribbed black plate - engraved base
1 6F6-G $15.00 National Union 110% 2000 / 2000Gm used (L) gray coat
1 6F6-G $12.00 RCA 90% 2100 / 2000Gm used (L) ribbed black plate - dark brown base
1 6F6-G $12.00 Zenith 90% 1800 / 2000Gm used (L) gray coat
1 6F6-G $12.00 Sylvania 90% 1600 / 2000Gm used (L) ribbed black plate
1 6F6-G $12.00 Philco 90% 1750 / 2000Gm used (L) ribbed black plate
1 6F6-G $12.00 Wards Super Airline 90% 2000 / 2000Gm used (L) black coat
1 6F6-G $10.00 Wards Super Airline 85% 1900 / 2000Gm used (L) black coat
1 6F6-GT $15.00 CBS 120% 2150 / 2000Gm NOS (wb) silver top - black plate
1 6F6-GT $15.00 Sylvania 130% 2450 / 2000Gm NOS (ob) torn box flap - ribbed gray plate
1 6F6-GT $15.00 GE 130% 2450 / 2000Gm NOS (OB) black plate
1 6F6-GT $15.00 National Union 120% 2300 / 2000Gm NOS (ob) black coat
1 6F6-GT $15.00 National Union 120% 2200 / 2000Gm NOS (ob) black coat
1 6F6-GT $15.00 RCA 115% 2400 / 2000Gm NOS (wb) silver top - black plate
1 6F6-GT $10.00 RCA 110% 2200 / 2000Gm used (OB) gray coat
1 6F6-GT $10.00 GE 120% 2450 / 2000Gm used (rb) black coat
1 6F6-GT $10.00 GE 110% 2500 / 2000Gm used (rb) black plate
1 6F6-GT $10.00 Tung-Sol 110% 2000 / 2000Gm used (rb) black coat
1 6F6-GT $10.00 National Union 110% 2200 / 2000Gm used (ob) black coat
1 6F6-GT $10.00 Philco 100% 2200 / 2000Gm used (rb) gray coat
1 6F6-GT $2.50 RCA 110% 2350 / 2000Gm used (rb) gray coat - cracked base - broken locator pin
1 6F6-GT $5.00 National Union 90% 1700 / 2000Gm used (L) black coat - loose base
1 6F6-GT $8.00 National Union 100% 1700 / 2000Gm used (L) gray coat - grid clip
1 6F6-GT $10.00 National Union 110% 2100 / 2000Gm used (L) gray coat - metal band base - grid clip
1 6F6-GT $10.00 Tung-Sol 100% 2000 / 2000Gm used (L) gray coat
1 6F6-GT $7.50 Tung-Sol 130% 2450 / 2000Gm used (L) gray coat - loose base
1 6F6-GT $10.00 Sylvania 125% 2300 / 2000Gm used (L) clear glass - green lettering - grid 'c' clip
1 6F6-GT $10.00 Sylvania 125% 2500 / 2000Gm used (L) clear glass - yellow lettering - chrome top
1 1611 $20.00 RCA 130% 2500 / 2000Gm NOS (OB) metal tube - special 6F6
1 1611 $20.00 RCA 140% 2800 / 2000Gm NOS (OB) metal tube - special 6F6
1 1611 $5.00 RCA 120% 2200 / 2000Gm used (OB) metal tube - minor rust on tube - special 6F6
1 1613 / VT-175 $15.00 RCA 120% 2400 / 2000Gm NOS (OB) metal tube - special 6F6
1 1613 / VT-175 $15.00 RCA 130% 2400 / 2000Gm NOS (OB) metal tube - special 6F6
1 1613 / VT-175 $15.00 RCA 120% 2500 / 2000Gm NOS (OB) metal tube - special 6F6 - JAN
1 1613 / VT-175 $15.00 RCA 120% 2600 / 2000Gm NOS (OB) metal tube - special 6F6 - JAN
1 1613 / VT-175 $8.00 RCA 120% 2250 / 2000Gm used (OB) metal tube - special 6F6
1 1613 / VT-175 $8.00 RCA 120% 2300 / 2000Gm used (rb) metal tube - special 6F6

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