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 41-GT $5.00 Philco 85% 1750 / 1600Gm GT - used (L) ribbed black plate - no coat
1 NU-41 $10.00 National Union 90% 1700 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 / VT-48 $7.00 Philco 110% 1950 / 1600Gm ST - used (L) ribbed black plate - gray coat - US Army
1 41 $2.00 Philco 85% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1500 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $2.00 Philco 85% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1700 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $2.00 Philco 85% 1800 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $2.00 Philco 85% 1700 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1450 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1650 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1500 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Philco 85% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $2.00 Philco 85% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $2.00 RCA 85% 1550 / 1600Gm ST - used (L) smooth black plate - no coat
1 41 $2.00 RCA 85% 1750 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat
1 41 $2.00 RCA 85% 1800 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $2.00 RCA 85% 1600 / 1600Gm ST - used (L) ribbed plate - gray coat
1 41 $2.00 RCA / Cunningham 85% 1750 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat
1 41 $2.00 National Union 95% 1600 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $2.00 National Union 85% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat - paint on tube (pl)
1 41 $2.00 National Union 85% 1600 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Delco 85% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $2.00 Wards Super Airline 85% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $2.00 Ken-Rad 85% 2000 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $2.00 Raytheon 85% 1850 / 1600Gm ST - used (L) ribbed plate - no coat
1 NU-42 $18.00 National Union 120% 2400 / 2000Gm ST - used (L) engraved base - ribbed black plate - no coat
1 42 $12.00 Ken-Rad 100% 2200 / 2000Gm ST - used (L) engraved base - ribbed plate - black coat
1 42 $12.00 Ken-Rad 100% 2250 / 2000Gm ST - used (L) engraved base - ribbed plate - black coat
1 42 $12.00 RCA / Cunningham 110% 2300 / 2000Gm ST - used (L) engraved base - ribbed black plate - no coat
1 42 $12.00 Philco 110% 2500 / 2000Gm ST - used (L) engraved base - ribbed black plate - no coat
1 42 $12.00 Hytron 100% 2200 / 2000Gm ST - used (L) engraved base - ribbed black plate - no coat
1 42 $12.00 National Union 100% 2250 / 2000Gm ST - used (L) engraved base - ribbed black plate - no coat
1 42 $10.00 Philco 100% 2350 / 2000Gm ST - used (L) ribbed black plate - no coat
1 42 $10.00 Tung-Sol 100% 2400 / 2000Gm ST - used (L) ribbed black plate - black coat
1 42 $10.00 Tung-Sol 120% 2600 / 2000Gm ST - used (L) ribbed black plate - no coat
1 42 $10.00 Silvertone 100% 2250 / 2000Gm ST - used (L) ribbed black plate - gray coat
1 42 $10.00 Ken-Rad 120% 2500 / 2000Gm ST - used (L) ribbed black plate - no coat
1 42 $10.00 Sylvania 110% 2300 / 2000Gm ST - used (L) ribbed black plate - no coat
1 42 $10.00 Sylvania 100% 1900 / 2000Gm ST - used (L) ribbed black plate - no coat
1 42 $10.00 Tung-Sol 110% 2400 / 2000Gm ST - used (L) ribbed black plate - black coat
1 42 $8.00 Wards Super Airline 95% 1950 / 2000Gm ST - used (L) ribbed black plate - black coat
1 42 $6.00 Philco 85% 2000 / 2000Gm ST - used (L) ribbed black plate - engraved base
1 47 $25.00 Raytheon 90% 1700 / 2000Gm ST - used (wb) ribbed black plate - no coat - engraved base - four pillar tube - loose base - no label
1 47 $40.00 Arcturus 110% 2400 / 2000Gm ST - NOS (wb) ribbed black plate - no coat- engraved base - cat:312-48
1 47 $40.00 Silvania 120% 3000 / 2000Gm ST - NOS (wb) engraved base - ribbed black plate - no coat
1 47 $40.00 Tung-Sol 120% 2100 / 2000Gm ST - NOS (wb) engraved base - -ribbed black plate - no coat
1 47 $35.00 Silvania 115% 1600 / 2000Gm ST - NOS (wb) ribbed black plate - no coat
1 47 $35.00 Sylvania 110% 2650 / 2000Gm ST - NOS (wb) ribbed black plate
1 47 $35.00 Raytheon 125% 2550 / 2000Gm ST - NOS (wb) ribbed black plate - no coat
1 47 $35.00 Tung-Sol 110% 2200 / 2000Gm ST - NOS (wb) ribbed black plate - no coat
1 47 $35.00 RCA 110% 2650 / 2000Gm ST - NOS (wb) ribbed black plate - no coat
1 47 $35.00 National Union 100% 2300 / 2000Gm ST - NOS (ob) ribbed black plate - no coat - damaged box
1 47 $35.00 National Union 110% 2200 / 2000Gm ST - NOS (wb) ribbed black plate - no coat
1 47 $20.00 Tung-Sol 110% 2200 / 2000Gm ST - used (wb) engraved base - ribbed black plate - no coat
1 47 $20.00 Raytheon 130% 2250 / 2000Gm ST - used (L) ribbed black plate - no coat
1 47 $20.00 Sylvania 105% 2150 / 2000Gm ST - used (L) ribbed black plate - no coat
1 47 $20.00 National Union 100% 2150 / 2000Gm ST - used (L) ribbed black plate - no coat
1 47 $12.00 Sylvania 90% 2300 / 2000Gm ST - used (rb) ribbed black plate - no coat - damaged box
1 47 $12.00 Tung-Sol 90% 2200 / 2000Gm ST - used (L) ribbed black plate - no coat - rattle in base
1 47 $12.00 Tung-Sol 90% 2000 / 2000Gm ST - used (L) ribbed black plate - black coat (cat:312-52)
1 47 $7.50 OK 85% 1200 / 2000Gm ST - used (L) ribbed black plate - no coat - engraved base
1 47 $7.50 Lafayette 85% 2150 / 2000Gm ST - used (L) ribbed black plate - black coat
1 47 $7.50 Tung-Sol 85% 1800 / 2000Gm ST - used (L) ribbed black plate - no coat
1 47 $7.50 RCA 85% 1900 / 2000Gm ST - used (L) ribbed black plate - no coat (pl)
1 48 $30.00 Super Silvertone 110% 2150 / 2000Gm ST - NOS (OB) ribbed black plate - no coat
1 48 $30.00 Bond 110% 2000 / 2000Gm ST - NOS (OB) smooth black plate - no coat
1 49 $30.00 Sylvania 130% 1800 / 1125Gm ST - NOS (wb) engraved base - silver plate - no coat
1 49 $25.00 National Union 120% 1400 / 1125Gm ST - NOS (OB) silver plate - no coat
1 49 $25.00 Sylvania 120% 1600 / 1125Gm ST - NOS (wb) silver plate - no coat
1 49 $25.00 RCA Victor 110% 1250 / 1125Gm ST - NOS (wb) silver plate - no coat
1 49 $25.00 Raytheon 100% 1200 / 1125Gm ST - NOS (wb) silver plate - no coat
1 49 $25.00 Raytheon 120% 1650 / 1125Gm ST - NOS (wb) silver plate - no coat
1 49 $12.00 Sylvania 100% 1300 / 1125Gm ST - used (rb) engraved base - silver plate - no coat
1 49 $12.00 National Union 120% 1350 / 1125Gm ST - used (L) engraved base - silver plate - no coat
1 49 $12.00 Sylvania 100% 1100 / 1125Gm ST - used (L) silver plate - no coat
1 49 $12.00 Sylvania 110% 1200 / 1125Gm ST - used (L) JAN - silver plate - no coat
1 49 $12.00 Cunningham 100% 1100 / 1125Gm ST - used (L) silver plate - no coat
1 49 $7.50 RCA / Cunningham 90% 1050 / 1125Gm ST - used (L) engraved base - silver plate - no coat
1 49 $7.50 RCA / Cunningham 95% 1500 / 1125Gm ST - used (L) engraved base - silver plate - no coat

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