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 6A7 $20.00 Raytheon 120% / 120% 1500 / 1000: 400 / 300Gm ST - NOS (wb) four pillar tube - engraved base
1 6A7 $20.00 Raytheon 140% / 120% 1400 / 1000: 450 / 300Gm ST - NOS (wb) four pillar tube - engraved base
1 6A7 $12.00 Hytron 140% 1500 / 1000Gm: 650 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Hytron 130% / 140% 1700 / 1000Gm: 600 / 300Gm ST - NOS (OB) --
1 6A7 $11.00 RCA 110% / 110% 1500 / 1000: 500 / 300Gm ST - NOS (OB) damaged box
1 6A7 $11.00 RCA 110% / 110% 1600 / 1000: 450 / 300Gm ST - NOS (wb) --
1 6A7 $11.00 RCA 120% / 120% 1600 / 1000: 450 / 300Gm ST - NOS (wb) --
1 6A7 $12.00 RCA 120% / 130% 1400 / 1000: 500 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 RCA 110% / 110% 1300 / 1000: 450 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 RCA / Cunningham 110% / 120% 1650 / 1000: 400 / 300Gm ST - NOS (wb) engraved base
1 6A7 $11.00 Raytheon 110% / 120% 1300 / 1000: 400 / 300Gm ST - NOS (wb) engraved base - Raytheon label
1 6A7 $12.00 Raytheon 120% / 130% 1450 / 1000: 600 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Rauland 120% / 130% 1600 / 1000: 450 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Motorola 130% / 140% 1500 / 1000: 550 / 300Gm ST - NOS (OB) damaged box cat:401-556
1 6A7 $12.00 Ken-Rad 110% / 110% 1200 / 1000: 450 / 300Gm ST - NOS (OB) engraved base
1 6A7 $11.00 Philco 110% / 120% 1300 / 1000: 500 / 300Gm ST - NOS (wb) --
1 6A7 $12.00 Sylvania 110% / 140% 1450 / 1000: 500 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Sylvania 120% / 140% 1500 / 1000: 750 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Sylvania 120% / 120% 1400 / 1000: 450 / 300Gm ST - NOS (wb) engraved base
1 6A7 $11.00 Sylvania 120% / 130% 1400 / 1000: 550 / 300Gm ST - NOS (OB) JAN - damaged box
1 6A7 $12.00 Sylvania 120% / 120% 1400 / 1000: 500 / 300Gm ST - NOS (OB) --
1 6A7 $12.00 Sylvania 110% / 140% 1050 / 1000: 600 / 300Gm ST - NOS (OB) --
1 6A7 $11.00 Sylvania 110% / 120% 1500 / 1000: 600 / 300Gm ST - NOS (wb) JAN
1 6A7 $11.00 Sylvania 130% / 140% 1700 / 1000: 650 / 300Gm ST - NOS (wb) --
1 6A7 $11.00 Sylvania 120% / 130% 1500 / 1000: 650 / 300Gm ST - NOS (wb) JAN
1 6A7 $11.00 Sylvania 120% / 140% 1700 / 1000: 650 / 300Gm ST - NOS (wb) engraved base
1 6A7 $6.00 Cunningham 110% / 110% 1500 / 1000: 450 / 300Gm ST - used (rb) cat:312-47
1 6A7 $6.00 Raytheon 110% / 140% 1400 / 1000: 700 / 300Gm ST - used (rb) --
1 6A7 $6.00 Raytheon 100% / 110% 1200 / 1000Gm: 400 / 300Gm ST - used (rb) cat:401-520
1 6A7 $6.00 Sylvania 120% / 120% 1500 / 1000: 600 / 300Gm ST - used (ob) --
1 6A7 $6.00 Sylvania 110% / 110% 1450 / 1000: 450 / 300Gm ST - used (wb) engraved base
1 6A7 $6.00 Sylvania 120% / 130% 1550 / 1000: 700 / 300Gm ST - used (ob) JAN
1 6A7 $6.00 National Union 130% / 140% 1500 / 1000: 700 / 300Gm ST - used (rb) --
1 6A7 $6.00 National Union 110% / 130% 1450 / 1000: 550 / 300Gm ST - used (wb) damaged box
1 6A7 $5.00 RCA Victor 100% / 120% 1400 / 1000: 450 / 300Gm ST - used (rb) --
1 6A7 $5.00 RCA / Cunningham 100% / 120% 1500 / 1000: 400 / 300Gm ST - used (wb) engraved base - cat:403-18
1 6A7 $6.00 RCA 110% / 130% 1500 / 1000: 600 / 300Gm ST - used (rb) --
1 6A7 $5.00 RCA 100% / 120% 1200 / 1000: 400 / 300Gm ST - used (ob) --
1 6A7 $6.00 RCA 110% / 110% 1600 / 1000: 450 / 300Gm ST - used (rb) --
1 6A7 $6.00 RCA 130% / 130% 1800 / 1000: 450 / 300Gm ST - used (wb) --
1 6A7 $6.00 Philco 110% / 120% 1400 / 1000Gm: 500 / 300Gm ST - used (L) cat:401-112
1 6A7 $6.00 Philco 130% / 100% 1350 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Philco 100% / 120% 1200 / 1000Gm: 500 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 Philco 100% / 110% 1200 / 1000Gm: 600 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Philco 110% / 100% 1200 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 Philco 100% / 100% 1250 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Philco 110% / 120% 1200 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 Philco 100% / 120% 1000 / 1000Gm: 450 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Philco 110% / 110% 1150 / 1000Gm: 450 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Philco 120% / 100% 1200 / 1000Gm: 300 / 300Gm ST - used (L) --
1 6A7 $6.00 Tung-Sol 110% / 150% 1650 / 1000Gm: 750 / 300Gm ST - used (L) --
1 6A7 $5.00 Tung-Sol 100% / 130% 1450 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Tung-Sol 120% / 140% 1800 / 1000Gm: 500 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 Tung-Sol 110% / 140% 1100 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $6.00 Tung-Sol 110% / 130% 1100 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $6.00 National Union 120% / 140% 1800 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $5.00 National Union 100% / 100% 1300 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 National Union 120% / 140% 1550 / 1000Gm: 450 / 300Gm ST - used (L) cat:312-60
1 6A7 $6.00 National Union 140% / 140% 1700 / 1000Gm: 550 / 300Gm ST - used (L) --
1 6A7 $6.00 National Union 130% / 140% 2050 / 1000Gm: 650 / 300Gm ST - used (L) cat:32-671
1 6A7 $6.00 National Union 120% / 140% 1600 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $6.00 National Union 110% / 110% 1250 / 1000Gm: 300 / 300Gm ST - used (L) cat:32-531
1 6A7 $6.00 National Union 110% / 140% 1600 / 1000Gm: 500 / 300Gm ST - used (L) engraved base
1 6A7 $6.00 National Union 110% / 110% 1700 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 120% / 130% 1500 / 1000Gm: 600 / 300Gm ST - used (L) cat:312-62
1 6A7 $5.00 Sylvania 100% / 140% 1500 / 1000Gm: 700 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 120% / 140% 1650 / 1000Gm: 600 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 120% / 140% 1450 / 1000Gm: 500 / 300Gm ST - used (L) JAN
1 6A7 $6.00 Sylvania 110% / 140% 1450 / 1000Gm: 750 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 120% / 130% 1500 / 1000Gm: 600 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 120% / 130% 1250 / 1000Gm: 400 / 300Gm ST - used (L) --
1 6A7 $6.00 Sylvania 110% / 130% 1300 / 1000Gm: 700 / 300Gm ST - used (L) --
1 6A7 $5.00 Sylvania 100% / 100% 1250 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 Sylvania 100% / 120% 1400 / 1000Gm: 600 / 300Gm ST - used (L) JAN
1 6A7 $6.00 Sylvania 110% / 120% 1500 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $5.00 RCA / Cunningham 100% / 100% 1350 / 1000Gm: 300 / 300Gm ST - used (L) engraved base
1 6A7 $4.00 RCA / Cunningham 100% / 120% 1300 / 1000Gm: 400 / 300Gm ST - used (L) engraved base - reglued cap
1 6A7 $5.00 RCA / Cunningham 120% / 130% 1700 / 1000Gm: 400 / 300Gm ST - used (L) engraved base - reglued cap
1 6A7 $5.00 RCA 100% / 120% 1500 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $6.00 RCA 120% / 120% 1550 / 1000Gm: 400 / 300Gm ST - used (L) cat:312-21
1 6A7 $6.00 RCA 110% / 120% 1500 / 1000Gm: 450 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 RCA Victor 100% / 120% 1450 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $5.00 Raytheon 110% / 120% 1400 / 1000Gm: 700 / 300Gm ST - used (L) reglued cap
1 6A7 $5.00 Raytheon 120% / 120% 1500 / 1000Gm: 400 / 300Gm ST - used (L) reglued cap
1 6A7 $6.00 Zenith 120% / 120% 1500 / 1000Gm: 600 / 300Gm ST - used (L) cat:312-56
1 6A7 $6.00 Zenith 130% / 130% 1450 / 1000Gm: 650 / 300Gm ST - used (L) --
1 6A7 $6.00 GE 130% / 140% 1700 / 1000Gm: 650 / 300Gm ST - used (L) cat:312-11
1 6A7 $6.00 GE 110% / 140% 1550 / 1000Gm: 700 / 300Gm ST - used (L) --
1 6A7 $6.00 Hytron 120% / 140% 1350 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $5.00 Silvertone 100% / 140% 1450 / 1000Gm: 700 / 300Gm ST - used (L) --
1 6A7 $5.00 International 100% / 120% 1300 / 1000Gm: 300 / 300Gm ST - used (L) engraved base
1 6A7 $5.00 Kadette 100% / 100% 1200 / 1000Gm: 400 / 300Gm ST - used (L) cat:312-32
1 6A7 $5.00 Champion 100% / 130% 1500 / 1000Gm: 600 / 300Gm ST - used (L) cat:403-123
1 6A7 $4.00 Unknown 120% / 100% 1400 / 1000Gm: 400 / 300Gm ST - used (L) --
1 6A7 $4.00 Unknown 110% / 120% 1500 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $3.00 National Union 90% / 120% 1450 / 1000Gm: 400 / 300Gm ST - used (L) --
1 6A7 $3.00 National Union 90% / 110% 1200 / 1000Gm: 300 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 National Union 85% / 120% 1150 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $3.00 GE 90% / 120% 1100 / 1000Gm: 450 / 300Gm ST - used (L) --
1 6A7 $3.00 GE 95% / 120% 1300 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $3.00 GE 90% / 120% 1200 / 1000Gm: 500 / 300Gm ST - used (L) cat:32-631
1 6A7 $3.00 RCA 90% / 130% 1450 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $3.00 RCA 90% / 90% 1300 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 RCA 90% / 120% 1400 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 RCA / Cunningham 90% / 100% 1400 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Champion 90% / 110% 1400 / 1000Gm: 400 / 300Gm ST - used (L) --
1 6A7 $3.00 Philco 90% / 90% 1150 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Philco 90% / 100% 1150 / 1000Gm: 250 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Philco 90% / 100% 1100 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Philco 100% / 90% 1250 / 1000Gm: 400 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Philco 95% / 95% 1000 / 1000Gm: 350 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Philco 90% / 130% 1500 / 1000Gm: 500 / 300Gm ST - used (L) engraved base
1 6A7 $3.00 Raytheon 90% / 90% 1000 / 1000Gm: 300 / 300Gm ST - used (L) engraved base
1 6A7 $2.50 Silvertone 90% / 150% 1400 / 1000Gm: 800 / 300Gm ST - used (L) reglued cap
1 6A7 $3.00 Tung-Sol 90% / 140% 1500 / 1000Gm: 600 / 300Gm ST - used (L) --
1 6A7 $3.00 Arcturus 90% / 100% 1100 / 1000Gm: 300 / 300Gm ST - used (L) engraved base
1 6A7 $2.50 Cornell by Raytheon 100% / 90% 1250 / 1000Gm: 450 / 300Gm ST - used (L) engraved base - reglued cap
1 6A7 $3.00 CeCo 90% / 130% 1200 / 1000Gm: 400 / 300Gm ST - used (L) --
1 6A7 $3.00 Westinghouse 90% / 140% 1400 / 1000Gm: 500 / 300Gm ST - used (L) --
1 6A7 $3.00 Delco 90% / 140% 1100 / 1000Gm: 450 / 300Gm 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