MDB Ventures Preoctal Radio Vacuum Tubes


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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/loktal, miniature, subminature, metal, power, transmitter tubes and many more.

MDB Ventures Preoctal Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 5X3 $20.00 National Union 110% / 105% -- ST - NOS (OB) brown base - damaged box
1 5X3 $20.00 Tung-Sol 105% / 110% -- ST - NOS (OB) JAN - brown base
1 6A6 $15.00 GE 120% / 120% 1750: 1800 / 1500Gm ST - NOS (OB) sealed in box - damaged box
1 6A6 $15.00 GE 115% / 120% 1700: 1750 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 GE 110% / 110% 1650: 1650 / 1500Gm ST - NOS (OB) sealed in box - damaged box
1 6A6 $15.00 GE 110% / 120% 1650: 1650 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 GE 110% / 110% 1600: 1650 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 GE 120% / 110% 1750: 1550 / 1500Gm ST - NOS (OB) sealed in box - damaged box
1 6A6 $15.00 GE 110% / 110% 1550: 1650 / 1500Gm ST - NOS (OB) sealed in box - damaged box
1 6A6 $15.00 GE 115% / 115% 1750: 1750 / 1500Gm ST - NOS (OB) sealed in box - damaged box
1 6A6 $15.00 GE 110% / 115% 1600: 1600 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 GE 120% / 120% 1750: 1800 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 GE 120% / 130% 1650: 1800 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 GE 120% / 120% 1700: 1750 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 Cunningham 105% / 110% 1800: 1900 / 1500Gm ST - NOS (OB) sealed in box - cat:401-568
1 6A6 $15.00 Westinghouse 115% / 100% 1500: 1600 / 1500Gm ST - NOS (OB) --
1 6A6 $15.00 Coronado 110% / 110% 1550: 1500 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 Delco 110% / 110% 1600: 1650 / 1500Gm ST - NOS (OB) sealed in box
1 6A6 $15.00 Delco 110% / 120% 1650: 1650 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 Delco 120% / 120% 1750: 1750 / 1500Gm ST - NOS (OB) --
1 6A6 $15.00 Delco 110% / 110% 1500: 1600 / 1500Gm ST - NOS (OB) damaged box - oem box
1 6A6 $15.00 RCA 100% / 100% 1500: 1500 / 1500Gm ST - NOS (OB) --
1 6A6 $15.00 RCA 100% / 100% 1700: 1650 / 1500Gm ST - NOS (OB) torn box flap
1 6A6 $15.00 RCA 110% / 110% 1550: 1550 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 National Union 120% / 120% 1600: 1550 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 Emerson 100% / 110% 1550: 1600 / 1500Gm ST - NOS (OB) US Army
1 6A6 $15.00 Marconi 110% / 115% 1550: 1600 / 1500Gm ST - NOS (OB) damaged box
1 6A6 $15.00 Tung-Sol 120% / 120% 1650: 1650 / 1500Gm ST - NOS (OB) cat:403-30
1 6A6 $15.00 RCA 120% / 120% 1700: 1700 / 1500Gm ST - NOS (wb) JAN
1 6A6 $15.00 GE 130% / 130% 1800: 1800 / 1500Gm ST - NOS (wb) --
1 6A6 $7.50 RCA 105% / 110% 1500: 1500 / 1500Gm ST - used (rb) --
1 6A6 $7.50 Arcturus 110% / 120% 1300: 1500 / 1500Gm ST - used (rb) --
1 6A6 $7.50 National Union 115% / 110% 1450: 1550 / 1500Gm ST - used (rb) engraved base
1 6A6 $7.50 National Union 100% / 100% 1400: 1450 / 1500Gm ST - used (L) engraved base
1 6A6 $7.50 Ken-Rad 100% / 100% 1350: 1400 / 1500Gm ST - used (L) engraved base
1 6A6 $7.50 Raytheon 110% / 110% 1450: 1400 / 1500Gm ST - used (L) engraved base
1 6A6 $7.50 GE 105% / 115% 1450: 1600 / 1500Gm ST - used (L) --
1 6A6 $7.50 RCA 115% / 105% 1600: 1450 / 1500Gm ST - used (L) cat:312-61
1 6A6 $7.50 RCA 120% / 105% 1300: 1450 / 1500Gm ST - used (L) ---
1 6A6 $7.50 RCA 110% / 105% 1550: 1600 / 1500Gm ST - used (L) US Army
1 6A6 $7.50 RCA 110% / 115% 1650: 1600 / 1500Gm ST - used (L) ---
1 6A6 $5.00 Marconi 120% / 115% 1700: 1650 / 1500Gm ST - used - leaky 10Mohm (OB) --
1 6A6 $4.00 RCA / Cunningham 105% / 95% 1500: 1250 / 1500Gm ST - used (L) engraved base
1 6A6 $4.00 RCA / Cunningham 95% / 100% 1400: 1450 / 1500Gm ST - used (wb) engraved base
1 6A6 $3.00 Ken-Rad 85% / 90% 1250: 1350 / 1500Gm ST - used (L) --
1 6D7 $20.00 National Union 150% 1300 / 1125Gm NOS (OB) factory installed goat shield - minor rust on shield - box flap missing
1 6Y5 $8.00 Majestic 100% / 100% -- ST - used (OB) engraved base - paint shield
1 6Z5 $10.00 National Union 110% / 110% -- ST - NOS (OB) sealed in box
1 6Z5 $10.00 National Union 110% / 110% -- ST - NOS (OB) sealed in box
1 6Z5 $10.00 Majestic 105% / 105% -- ST - NOS (OB) engraved base
1 6Z5 $10.00 Majestic 100% / 100% -- ST - NOS (OB) engraved base
1 6Z5 $10.00 Majestic 100% / 100% -- ST - NOS (OB) engraved base
1 6Z5 $5.00 National Union 100% / 110% -- ST - used (wb) engraved base
1 6Z5 $5.00 Majestic 100% / 100% -- ST - used (rb) engraved base

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, 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 preoctal 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