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 85 $5.00 GM 140% diodes: 120% / 125% 1350 / 975Gm ST - NOS (wb) engraved base
1 85 $5.00 RCA / Cunningham 115% diodes: 130% / 125% 1250 / 975Gm ST - NOS (wb) engraved base
1 85 $4.00 Hytron 120% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Hytron 115% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Hytron 120% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Hytron 110% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Hytron 120% diodes: 120% / 120% 1300 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Hytron 130% diodes: 125% / 125% 1300 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Philco 120% diodes: 125% / 125% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Philco 120% diodes: 125% / 125% 1300 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Philco 115% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Philco 110% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Philco 130% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 Philco 120% diodes: 120% / 120% 1200 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 Ken-Rad 115% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) sealed in box
1 85 $4.00 Ken-Rad 125% diodes: 120% / 120% 1350 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Ken-Rad 120% diodes: 110% / 120% 1300 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 Tung-Sol 120% diodes: 125% / 130% 1200 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Tung-Sol 120% diodes: 125% / 130% 1300 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Tung-Sol 120% diodes: 130% / 130% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Art 140% diodes: 125% / 130% 1400 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 National Union 130% diodes: 125% / 130% 1250 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 Sylvania 110% diodes: 120% / 130% 1200 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 Hytron 120% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) ---
1 85 $4.00 Delco 115% diodes: 120% / 120% 1200 / 975Gm ST - NOS (OB) damaged box
1 85 $4.00 RCA 120% diodes: 120% / 120% 1250 / 975Gm ST - NOS (OB) water damaged box
1 85 $4.00 Raytheon 110% diodes: 120% / 120% 1200 / 975Gm ST - NOS (OB) sealed in box - damaged box
1 85 $4.00 Hytron 120% diodes: 120% / 120% 1350 / 975Gm ST - NOS (wb) ---
1 85 $4.00 Hytron 110% diodes: 120% / 120% 1250 / 975Gm ST - NOS (wb) ---
1 85 $4.00 Delco 120% diodes: 120% / 120% 1200 / 975Gm ST - NOS (wb) ---
1 85 $4.00 Raytheon 135% diodes: 120% / 120% 1400 / 975Gm ST - NOS (wb) ---
1 85 $3.00 Sylvania 135% diodes: 125% / 130% 1350 / 975Gm ST - used (rb) ---
1 85 $3.00 RCA Victor 100% diodes: 120% / 120% 1200 / 975Gm ST - used (rb) ---
1 85 $3.00 RCA Radiotron 110% diodes: 110% / 120% 1200 / 975Gm ST - used (rb) ---
1 85AS $3.00 unknown (National Union?) 90% diodes: 130% / 110% 600 / 975Gm ST - used (rb) no shield
1 85 $2.00 Sylvania 85% diodes: 110% / 110% 900 / 975Gm ST - used (rb) ---
1 89Y $6.00 Sylvania 130% 1650 / 1550Gm ST - NOS (OB) brown base - US Navy - damaged box
1 89Y $6.00 Sylvania 130% 1750 / 1550Gm ST - NOS (wb) brown base - US Navy
1 89Y $6.00 Sylvania 130% 1700 / 1550Gm ST - NOS (wb) brown base
1 89 $5.50 Ken-Rad 110% 1550 / 1550Gm ST - NOS (OB) brown base
1 89 $5.50 Ken-Rad 110% 1750 / 1550Gm ST - NOS (OB) brown base - sealed in box
1 89 $5.50 Ken-Rad 110% 1700 / 1550Gm ST - NOS (OB) brown base - damaged box
1 89 $5.50 Ken-Rad 120% 1700 / 1550Gm ST - NOS (wb) brown base
1 89 $5.50 Ken-Rad 120% 1800 / 1550Gm ST - NOS (wb) brown base
1 89 $5.50 RCA 125% 1800 / 1550Gm ST - NOS (wb) brown base - US Navy
1 89 $5.50 RCA 110% 1650 / 1550Gm ST - NOS (wb) brown base - US Navy
1 89 $5.50 RCA 105% 1600 / 1550Gm ST - NOS (wb) brown base - US Navy
1 89 $5.50 Admiral 100% 1600 / 1550Gm ST - NOS (OB) brown base
1 89 $5.50 Admiral 110% 1650 / 1550Gm ST - NOS (OB) brown base
1 NU-89 $5.00 National Union 120% 1850 / 1550Gm ST - NOS (wb) engraved base
1 NU-89 $5.00 National Union 120% 1800 / 1550Gm ST - NOS (wb) engraved base
1 NU-89 $5.00 National Union 110% 1700 / 1550Gm ST - NOS (wb) engraved base
1 NU-89 $5.00 National Union 105% 1700 / 1550Gm ST - NOS (wb) engraved base
1 NU-89 $5.00 National Union 120% 1950 / 1550Gm ST - NOS (wb) engraved base
1 89 $4.00 Sylvania 110% 1650 / 1550Gm ST - NOS (OB) damaged box cat:403-68
1 89 $4.00 Sylvania 110% 1650 / 1550Gm ST - NOS (wb) ---
1 89 $4.00 Philco 120% 1600 / 1550Gm ST - NOS (OB) sealed in box
1 89 $4.00 Philco 110% 1950 / 1550Gm ST - NOS (OB) sealed in box
1 89 $4.00 Philco 120% 1700 / 1550Gm ST - NOS (OB) damaged box
1 89 $4.00 Philco 130% 1750 / 1550Gm ST - NOS (OB) damaged box
1 89 $4.00 National Union 125% 1750 / 1550Gm ST - NOS (OB) damaged box
1 89 $4.00 Raytheon 100% 1550 / 1550Gm ST - NOS (wb) cat:401-451
1 89 $4.00 Raytheon 120% 1700 / 1550Gm ST - NOS (OB) sealed in box
1 NU-89 $3.00 National Union 120% 1750 / 1550Gm ST - used (rb) engraved base
1 89 $3.00 Sylvania 120% 1700 / 1550Gm ST - used (OB) damaged box - cat:402-288
1 89 $3.00 RCA Victor 110% 1600 / 1550Gm ST - used (OB) ---
1 89 $3.00 RCA 110% 1650 / 1550Gm ST - used (rb) engraved base
1 89 $3.00 GM 120% 1700 / 1550Gm 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