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 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 130%: diodes 110% / 110% 1300 / 1000Gm ST - NOS (OB) --
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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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com