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
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1 | 6B7 | $12.00 | Raytheon | 160%: diodes 110% / 120% | 1200 / 1000Gm | ST - used (wb) | four pillar tube - engraved base |
1 | 6B7 | $12.00 | Raytheon | 110%: diodes 100% / 110% | 1150 / 1000Gm | used (wb) | four pillar tube - engraved base |
1 | 6B7 | $5.00 | Sylvania | 100%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | damaged box |
1 | 6B7 | $6.00 | Sylvania | 110%: diodes 120% / 120% | 1200 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Sylvania | 130%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Sylvania | 125%: diodes 120% / 110% | 1300 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Sylvania | 105%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Sylvania | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | cat:32-331 |
1 | 6B7 | $6.00 | Sylvania | 110%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 / VT-68 | $6.00 | Sylvania | 130%: diodes 110% / 110% | 1400 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | Sylvania | 125%: diodes 110% / 115% | 1300 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | Sylvania | 120%: diodes 115% / 115% | 1200 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | National Union | 120%: diodes 115% / 120% | 1200 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | National Union | 130%: diodes 110% / 110% | 1350 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | National Union | 110%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | National Union | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | National Union | 120%: diodes 115% / 100% | 1200 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $5.00 | National Union | 100%: diodes 110% / 115% | 1100 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | National Union | 110%: diodes 110% / 110% | 1200 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | National Union | 110%: diodes 110% / 110% | 1200 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $5.00 | National Union | 100%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | engraved base |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | JAN - cat:401-499 |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | JAN - cat:401-79-3 |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | JAN - cat:401-79-1 - damaged box |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | JAN - cat:401-79-4 |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (rb) | JAN - cat:401-79-2 - in tung-sol box |
1 | 6B7 / VT-68 | $6.00 | RCA | 100%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | US Army - oem box |
1 | 6B7 / VT-68 | $6.00 | RCA | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | JAN - cat:401-498 |
1 | 6B7 | $6.00 | RCA | 120%: diodes 110% / 110% | 1300 / 1000Gm | ST - NOS (OB) | cat:401-478 |
1 | 6B7 | $6.00 | RCA | 120%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | missing box flap |
1 | 6B7 | $6.00 | RCA | 120%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | missing box flap |
1 | 6B7 | $6.00 | RCA | 125%: diodes 120% / 120% | 1350 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | RCA / Cunningham | 110%: diodes 100% / 110% | 1200 / 1000Gm | ST - NOS (wb) | engraved base |
1 | 6B7 | $6.00 | RCA Victor | 120%: diodes 110% / 105% | 1300 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Cunningham | 120%: diodes 110% / 120% | 1250 / 1000Gm | ST - NOS (wb) | engraved base |
1 | 6B7 | $6.00 | Cunningham | 110%: diodes 110% / 110% | 1200 / 1000Gm | ST - NOS (wb) | engraved base |
1 | 6B7 | $6.00 | Raytheon | 130%: diodes 120% / 110% | 1300 / 1000Gm | ST - NOS (OB) | sealed in box - water damaged box - cat:312-397 |
1 | 6B7 | $6.00 | Raytheon | 140%: diodes 110% / 110% | 1400 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | Raytheon | 120%: diodes 110% / 110% | 1200 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | Raytheon | 100%: diodes 110% / 100% | 1100 / 1000Gm | ST - NOS (OB) | sealed in box |
1 | 6B7 | $6.00 | Tung-Sol | 120%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | JAN - cat:401-78 |
1 | 6B7 | $6.00 | Tung-Sol | 120%: diodes 110% / 105% | 1300 / 1000Gm | ST - NOS (OB) | JAN - cat:401-497 |
1 | 6B7 | $6.00 | Tung-Sol | 130%: diodes 110% / 110% | 1350 / 1000Gm | ST - NOS (OB) | JAN - cat:401-495 |
1 | 6B7 | $6.00 | Tung-Sol | 120%: diodes 110% / 105% | 1200 / 1000Gm | ST - NOS (OB) | JAN |
1 | 6B7 | $6.00 | Ken-Rad | 130%: diodes 110% / 110% | 1350 / 1000Gm | ST - NOS (wb) | engraved base |
1 | 6B7 | $6.00 | Ken-Rad | 125%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | Ken-Rad | 120%: diodes 110% / 110% | 1300 / 1000Gm | ST - NOS (wb) | -- |
1 | 6B7 | $6.00 | Ken-Rad | 120%: diodes 110% / 110% | 1200 / 1000Gm | ST - NOS (wb) | engraved base |
1 | 6B7 | $6.00 | Philco | 115%: diodes 115% / 115% | 1150 / 1000Gm | ST - NOS (OB) | damaged box |
1 | 6B7 | $6.00 | GE | 110%: diodes 110% / 105% | 1100 / 1000Gm | ST - NOS (OB) | cat:401-557 |
1 | 6B7 | $6.00 | CBS / Hytron | 120%: diodes 110% / 120% | 1250 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $5.00 | CBS / Hytron | 100%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | cat:401-439 |
1 | 6B7 | $5.00 | CBS / Hytron | 105%: diodes 110% / 110% | 1100 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | CBS / Hytron | 120%: diodes 110% / 110% | 1250 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | CBS / Hytron | 120%: diodes 110% / 110% | 1300 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | CBS / Hytron | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - NOS (OB) | cat:401-480 |
1 | 6B7 | $6.00 | Hytron | 120%: diodes 110% / 120% | 1250 / 1000Gm | ST - NOS (OB) | -- |
1 | 6B7 | $6.00 | National Union | 110%: diodes 110% / 110% | 1150 / 1000Gm | ST - used (ob) | engraved base |
1 | 6B7 | $2.00 | Hytron | 85%: diodes 110% / 110% | 950 / 1000Gm | ST - used (rb) | -- |
1 | 6B7 | $3.00 | Super Airline | 100%: diodes 100% / 100% | 1100 / 1000Gm | ST - used (rb) | cat:401-152 |
1 | 6B7 | $2.50 | Ken-Rad | 90%: diodes 110% / 110% | 900 / 1000Gm | ST - used (ob) | cat:312-8 |
1 | 6B7 | $2.00 | Philco | 75%: diodes 110% / 105% | 900 / 1000Gm | ST - used (rb) | -- |
1 | 6B7 | $3.00 | Tung-Sol | 110%: diodes 110% / 110% | 1200 / 1000Gm | ST - used (rb) | engraved base |
1 | 6B7 | $2.50 | RCA / Cunningham | 90%: diodes 110% / 105% | 1050 / 1000Gm | ST - used (rb) | engraved base - damaged box |
1 | 6B7 | $4.00 | Tung-Sol | 125%: diodes 110% / 110% | 1300 / 1000Gm | ST - used (rb) | engraved base |
1 | 6B7 | $3.00 | Tung-Sol | 100%: diodes 115% / 110% | 1100 / 1000Gm | ST - used (rb) | -- |
1 | 6B7 / VT-68 | $4.00 | RCA | 110%: diodes 110% / 110% | 1200 / 1000Gm | ST - used (L) | -- |
1 | 6B7 | $3.00 | Ken-Rad | 130%: diodes 100% / 110% | 1500 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | RCA | 100%: diodes 105% / 105% | 1050 / 1000Gm | ST - used (L) | loose cap |
1 | 6B7 | $3.00 | RCA / Cunningham | 100%: diodes 110% / 110% | 1200 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | RCA / Cunningham | 105%: diodes 110% / 110% | 1150 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | National Union | 100%: diodes 100% / 110% | 1150 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | Wards Super Airline | 100%: diodes 120% / 115% | 1100 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | Super Airline | 100%: diodes 110% / 110% | 1050 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $3.00 | CBS / Hytron | 100%: diodes 110% / 110% | 1050 / 1000Gm | ST - used (L) | -- |
1 | 6B7 | $4.00 | Delco | 110%: diodes 110% / 100% | 1200 / 1000Gm | ST - used (L) | -- |
1 | 6B7 | $2.50 | Ken-Rad | 90%: diodes 110% / 110% | 950 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $2.00 | National Union | 85%: diodes 80% / 100% | 900 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $2.50 | Super Airline | 90%: diodes 110% / 110% | 1000 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $2.50 | Super Airline | 90%: diodes 110% / 100% | 900 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $2.00 | Sylvania | 85%: diodes 115% / 115% | 900 / 1000Gm | ST - used (L) | engraved base |
1 | 6B7 | $2.50 | CBS | 90%: diodes 110% / 110% | 1000 / 1000Gm | ST - used (L) | -- |
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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Preoctal and Globe/Balloon Vacuum Tube List
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