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 42* $20.00 Philco 110% 2250 / 2000Gm ST - NOS (wb) ribbed plate - no coat
1 42* $25.00 Philco 110% 2300 / 2000Gm ST - NOS (wb) engraved base - smooth plate - no coat
1 42 $25.00 Tung-Sol 130% 2500 / 2000Gm ST - used (wb) engraved base - smooth plate - no coat
1 42 $20.00 Hytron 120% 2950 / 2000Gm ST - NOS (wb) ribbed plate - no coat
1 42 $20.00 Sylvania 110% 2400 / 2000Gm ST - NOS (OB) ribbed plate - no coat
1 42 $20.00 Sylvania 110% 2200 / 2000Gm ST - NOS (wb) ribbed plate - no coat
1 42 $20.00 Sylvania 115% 2600 / 2000Gm ST - NOS (wb) ribbed plate - no coat - JAN
1 42 $20.00 Sylvania 115% 2600 / 2000Gm ST - NOS (wb) ribbed plate - no coat - JAN
1 42 $20.00 National Union 115% 2200 / 2000Gm ST - NOS (wb) ribbed plate - black coat
1 42 $20.00 Tung-Sol 125% 2750 / 2000Gm ST - NOS (wb) ribbed plate - black coat
1 42 $12.00 National Union 110% 2200 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $12.00 National Union 120% 2400 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $12.00 Ken-Rad 110% 2300 / 1600Gm ST - used (L) engraved base - ribbed black plate - black coat
1 42 $12.00 Philco 100% 1950 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $12.00 Philco 100% 2100 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $12.00 Philco 110% 2200 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $12.00 Tung-Sol 110% 2300 / 2000Gm ST - used (L) engraved base smooth plate no coat
1 42 $12.00 Wards Super Airline 100% 2200 / 2000Gm ST - used (L) engraved base ribbed plate black coat
1 42 $12.00 Triad 110% 2150 / 2000Gm ST - used (L) engraved base smooth plate no coat
1 42 $12.00 Hytron 115% 2300 / 2000Gm ST - used (L) engraved base ribbed plate no coat
1 42 $12.00 Ceco 110% 2250 / 2000Gm ST - used (L) engraved base ribbed plate no coat
1 42 $10.00 RCA 130% 2500 / 2000Gm ST - used (rb) ribbed plate - gray coat - US Navy
1 42 $10.00 RCA 120% 2500 / 2000Gm ST - used (rb) smooth plate - no coat
1 42 $10.00 RCA / Cunningham 100% 2100 / 2000Gm ST - used (wb) smooth black plate - no coat
1 42 $10.00 Sylvania 100% 2300 / 2000Gm ST - used (rb) smooth plate - no coat
1 42 $10.00 Sylvania 100% 2500 / 2000Gm ST - used (rb) ribbed plate - no coat
1 42 $10.00 Sylvania 110% 2500 / 2000Gm ST - used (rb) ribbed plate - no coat - damaged box
1 42 $10.00 Sylvania 100% 2200 / 2000Gm ST - used (rb) ribbed plate - no coat
1 42 $10.00 Sylvania 110% 2300 / 2000Gm ST - used (rb) ribbed plate - no coat - damaged box
1 42 $10.00 Sylvania 110% 2250 / 2000Gm ST - used (wb) ribbed plate - no coat
1 42 $10.00 Philco 100% 2400 / 2000Gm ST - used (rb) ribbed plate - gray coat
1 42 $10.00 Philco 100% 1950 / 2000Gm ST - used (rb) ribbed plate - no coat - damaged box - cat:312-190
1 42 $10.00 Philco 100% 1900 / 2000Gm ST - used (rb) ribbed plate - gray coat
1 42 $10.00 Tung-Sol 100% 2050 / 2000Gm ST - used (rb) ribbed plate - black coat
1 42 $10.00 Hytron 110% 2400 / 2000Gm ST - used (rb) ribbed plate - no coat
1 42 $10.00 Raytheon 115% 2400 / 2000Gm ST - used (rb) ribbed plate - no coat
1 42 $10.00 Raytheon 110% 2300 / 2000Gm ST - used (wb) ribbed plate no coat
1 42 $10.00 Philco 100% 2150 / 2000Gm ST - used (L) ribbed plate - no coat
1 42 $10.00 Philco 100% 2200 / 2000Gm ST - used (L) ribbed plate - no coat
1 42 $10.00 Philco 110% 2300 / 2000Gm ST - used (L) ribbed plate - no coat
1 42 $10.00 Philco 110% 2050 / 2000Gm ST - used (L) ribbed plate - gray coat
1 42 $10.00 National Union 120% 2350 / 2000Gm ST - used (wb) ribbed plate - gray coat
1 42 $10.00 National Union 110% 2200 / 2000Gm ST - used (wb) ribbed plate - gray coat
1 42 $10.00 National Union 110% 2200 / 2000Gm ST - used (L) ribbed plate - black coat
1 42 $10.00 National Union 130% 2500 / 2000Gm ST - used (L) ribbed plate - no coat
1 42 $10.00 National Union 110% 2250 / 2000Gm ST - used (L) ribbed plate - gray coat
1 42 $10.00 National Union 100% 2100 / 2000Gm ST - used (L) ribbed plate - gray coat
1 42 $10.00 National Union 100% 1850 / 2000Gm ST - used (L) ribbed plate - black coat
1 42 $10.00 National Union 100% 2200 / 2000Gm ST - used (L) ribbed plate - black coat
1 42 $10.00 National Union 115% 2300 / 2000Gm ST - used (L) ribbed plate - gray coat
1 42 $10.00 Sylvania 100% 1950 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 110% 2250 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 100% 1950 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 115% 2400 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 110% 2200 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 110% 2400 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 100% 2250 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 110% 2250 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Sylvania 100% 2000 / 2000Gm ST - used (L) ribbed plate no coat US Navy
1 42 $10.00 Wards Super Airline 100% 2250 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 Tung-Sol 120% 2400 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 Tung-Sol 120% 2500 / 2000Gm ST - used (L) ribbed plate gray coat
1 42 $10.00 Tung-Sol 125% 2700 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 Tung-Sol 100% 2100 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 Tung-Sol 110% 2550 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 Tung-Sol 110% 2400 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $10.00 RCA 110% 2500 / 2000Gm ST - used (L) smooth plate gray coat
1 42 $10.00 Delco 125% 2600 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Ken-Rad 110% 2200 / 2000Gm ST - used (L) ribbed plate black coat cat:402-11
1 42 $10.00 Arcturus 110% 2200 / 2000Gm ST - used (L) ribbed plate gray coat
1 42 $10.00 Delco 100% 2550 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 Ken-Rad 110% 2250 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 RCA 110% 2450 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $10.00 RCA 100% 2200 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $5.00 National Union 120% 2400 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat - particles inside
1 42 $5.00 Philco 90% 2100 / 2000Gm ST - used (L) ribbed plate - no coat
1 42 $5.00 Sylvania 90% 2150 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $5.00 Sylvania 95% 1850 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $5.00 Sylvania 90% 1900 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $5.00 Tung-Sol 95% 2000 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $5.00 Tung-Sol 95% 2400 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $5.00 RCA 95% 2000 / 2000Gm ST - used (L) ribbed plate no coat
1 42 $5.00 Wards Super Airline 90% 2100 / 2000Gm ST - used (L) ribbed plate black coat
1 42 $5.00 Grunow 90% 1950 / 2000Gm ST - used (L) engraved base ribbed plate no coat
1 42 $4.00 Philco 85% 2100 / 2000Gm ST - used (L) engraved base - ribbed plate - no coat
1 42 $4.00 Triad 85% 1800 / 2000Gm ST - used (L) smooth 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