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 $15.00 Philco 125% 2250 / 1600Gm GT - NOS (OB) ribbed black plate - no coat
1 41-GT $15.00 Philco 115% 2050 / 1600Gm GT - NOS (OB) ribbed black plate - no coat
1 41-GT $15.00 Philco 110% 2100 / 1600Gm GT - NOS (OB) ribbed black plate - no coat
1 41 / VT-48 $7.00 Sylvania 115% 2100 / 1600Gm ST - used (L) ribbed black plate - no coat - JAN
1 41 $12.00 Philco 110% 2200 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Philco 110% 1950 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Philco 110% 1950 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Philco 115% 1950 / 1600Gm ST - NOS (wb) engraved base - smooth black plate - no coat
1 41 $12.00 Philco 110% 2050 / 1600Gm ST - NOS (wb) engraved base - smooth black plate - gray coat
1 41 $12.00 National Union 120% 2100 / 1600Gm ST - NOS (OB) ribbed black plate - no coat
1 41 $12.00 Sylvania 120% 1900 / 1600Gm ST - NOS (OB) ribbed black plate - no coat
1 41 $12.00 Sylvania 105% 1900 / 1600Gm ST - OS (OB) ribbed black plate - no coat - water damaged box
1 41 $12.00 Sylvania 110% 1800 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Sylvania 115% 1950 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Sylvania 120% 2050 / 1600Gm ST - NOS (OB) ribbed black plate - no coat
1 41 $12.00 Sylvania 110% 1900 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 Sylvania 115% 1900 / 1600Gm ST - NOS (wb) ribbed black plate - no coat
1 41 $12.00 RCA 115% 2000 / 1600Gm ST - NOS (wb) ribbed black plate - gray coat
1 41 $12.00 RCA 110% 1950 / 1600Gm ST - NOS (wb) ribbed black plate - gray coat - US Navy
1 41 $12.00 RCA 110% 2000 / 1600Gm ST - NOS (OB) ribbed black plate - gray coat - US Navy
1 41 $12.00 RCA Victor 110% 2100 / 1600Gm ST - NOS (OB) sealed in box
1 41 $12.00 Marconi 100% 1900 / 1600Gm ST - NOS (wb) smooth black plate - gray coat
1 41 $12.00 RCA / Cunnigham 110% 1900Gm ST - NOS (wb) smooth black plate - no coat
1 41 $7.50 Philco 100% 2000 / 1600Gm ST - used (ob) engraved base - smooth black plate - gray coat - damaged box
1 41 $7.50 Philco 110% 1850 / 1600Gm ST - used (rb) engraved base - smooth black plate - gray coat
1 41 $7.50 RCA 110% 2050 / 1600Gm ST - used (rb) engraved base - smooth black plate - no coat
1 41 $7.50 Sylvania 120% 2000 / 1600Gm ST - used (rb) engraved base - smooth black plate - gray coat
1 41 $7.50 Sylvania 110% 1900 / 1600Gm ST - used (rb) engraved base - smooth black plate - gray coat
1 41 $7.50 Philco 115% 2000 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat
1 41 $7.50 Philco 110% 1850 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat
1 41 $7.50 Philco 110% 1850 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 110% 2250 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 1950 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 100% 1950 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 2000 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 110% 2250 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 100% 9000 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 110% 1800 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 110% 1850 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 2000 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 100% 2100 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 100% 1850 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 105% 1800 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Philco 110% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Sylvania 120% 2100 / 1600Gm ST - used (L) engraved base - smooth black plate - gray coat - reglued base
1 41 $7.50 Sylvania 110% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 RCA / Cunningham 100% 1850 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat (pl)
1 41 $7.50 GM 100% 1700 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $7.50 Ken-Rad 100% 1950 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $7.50 Ken-Rad 100% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $7.50 Troy 100% 1800 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $7.50 Super Silvertone 105% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $5.00 Philco 110% 1850 / 1600Gm ST - used (rb) ribbed black plate - no coat
1 41 $5.00 RCA 100% 1900 / 1600Gm ST - used (rb) smooth black plate - gray coat
1 41 $5.00 RCA 100% 1950 / 1600Gm ST - used (rb) ribbed black plate - gray coat
1 41 $5.00 RCA 110% 2000 / 1600Gm ST - used (ob) ribbed black plate - no coat - damaged box
1 41 $5.00 Tung-Sol 105% 2000 / 1600Gm ST - used (ob) ribbed black plate - no coat - damaged box
1 41 $5.00 Sylvania 120% 1950 / 1600Gm ST - used (ob) ribbed black plate - no coat - damaged box
1 41 $5.00 Sylvania 110% 2250 / 1600Gm ST - used (rb) ribbed black plate - no coat
1 41 $5.00 Sylvania 110% 1900 / 1600Gm ST - used (rb) ribbed black plate - no coat - cat:321-131
1 41 $5.00 National Union 115% 1850 / 1600Gm ST - used (rb) ribbed black plate - no coat
1 41 $5.00 National Union 100% 1750 / 1600Gm ST - used (rb) ribbed black plate - no coat - damaged box
1 41 $5.00 Raytheon 100% 1850 / 1600Gm ST - used (ob) ribbed plate - gray coat - damaged box
1 41 $5.00 Sylvania 115% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 100% 1700 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $5.00 Philco 105% 1850 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $5.00 Philco 100% 1600 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Philco 100% 1500 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Philco 100% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 100% 2250 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 110% 1850 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 110% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 105% 1700 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 120% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 110% 1850 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 105% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 115% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat - cracked base
1 41 $5.00 Philco 105% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Philco 110% 1950 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 National Union 110% 2100 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 National Union 105% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 National Union 100% 2250 / 1600Gm ST - used (L) ribbed black plate - no coat - paint on tube
1 41 $5.00 National Union 100% 1950 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 National Union 100% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 National Union 90% 1700 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 National Union 90% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 National Union 100% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Sylvania 100% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat - US Navy
1 41 $5.00 Sylvania 110% 1950 / 1600Gm ST - used (L) ribbed black plate - no coat - US Navy - cat:312-207
1 41 $5.00 Sylvania 110% 1950 / 1600Gm ST - used (L) ribbed black plate - no coat - US Navy
1 41 $5.00 Sylvania 100% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat - US Navy
1 41 $5.00 Sylvania 110% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat - US Navy
1 41 $5.00 Sylvania 105% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Sylvania 120% 2200 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Sylvania 100% 1850 / 1600Gm ST - used (L) ribbed black plate - no coat (pl)
1 41 $5.00 Sylvania 110% 2000 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Sylvania 105% 1950 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 RCA 110% 2050 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 RCA 110% 1950 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Raytheon 100% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Raytheon 100% 1800 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 GE 100% 1900 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Delco 100% 1850 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Delta 100% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Ceco 100% 1900 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $5.00 Super Silvertone 100% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $5.00 Wards Super Airline 100% 1800 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $5.00 Cunningham 100% 1900 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $5.00 Hytron 100% 1950 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $5.00 Hytron 105% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat (pl)
1 41 $5.00 unknown 100% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.50 Philco 90% 1700 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $3.50 Philco 95% 1800 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $3.50 Philco 90% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $3.50 Philco 95% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $3.50 Philco 95% 1800 / 1600Gm ST - used (L) engraved base - ribbed black plate - no coat
1 41 $3.50 Philco 95% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - gray coat
1 41 $3.50 National Union 95% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat - engraved base
1 41 $3.50 National Union 90% 1600 / 1600Gm ST - used (L) ribbed black plate - no coat - engraved base
1 41 $3.50 RCA / Cunningham 90% 1900 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat
1 41 $3.50 RCA / Cunningham 90% 1850 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat (pl)
1 41 $3.50 RCA / Cunningham 90% 2000 / 1600Gm ST - used (L) engraved base - smooth black plate - no coat (pl)
1 41 $3.50 Ken-Rad 95% 1900 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $3.50 Ken-Rad 95% 1850 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $3.50 Wards Super Airline 90% 1750 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 41 $3.00 Sylvania 95% 1750 / 1600Gm ST - used (ob) ribbed black plate - no coat - damaged box
1 41 $3.00 Arcturus 90% 1800 / 1600Gm ST - used (rb) ribbed black plate - gray coat
1 41 $3.00 Philco 95% 1650 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 90% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 1850 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 2000 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 1600 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 95% 1900 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 90% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 90% 1650 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Philco 90% 1900 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $3.00 Sylvania 90% 1650 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Sylvania 90% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Sylvania 95% 1750 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Sylvania 95% 1800 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Sylvania 90% 1700 / 1600Gm ST - used (L) ribbed black plate - no coat
1 41 $3.00 Sylvania 95% 1750 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $3.00 RCA 95% 1900 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Ken-Rad 90% 2000 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Ken-Rad 90% 1600 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Ken-Rad 90% 1900 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Ken-Rad 95% 1800 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Ken-Rad 95% 1900 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Ken-Rad 95% 2150 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Wards Super Airline 95% 1800 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Wards Super Airline 95% 1850 / 1600Gm ST - used (L) ribbed black plate - black coat (pl)
1 41 $3.00 Wards Super Airline 90% 1950 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Kadette 95% 1800 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Kadette 90% 1900 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Kadette 90% 1900 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Cunningham 90% 1700 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $3.00 Cunningham 90% 1800 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Cunningham 90% 1900 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 Cunningham 90% 1750 / 1600Gm ST - used (L) smooth black plate - gray coat
1 41 $3.00 GE 95% 1850 / 1600Gm ST - used (L) ribbed black plate - gray coat
1 41 $3.00 GE 95% 1850 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 Wizard 95% 1800 / 1600Gm ST - used (L) ribbed black plate - black coat
1 41 $3.00 RCA 90% 1800 / 1600Gm ST - used (L) smooth black plate - no coat
1 41 $3.00 Tung-Sol 90% 1650 / 1600Gm ST - used (L) ribbed black plate - gray 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