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 6F7 $15.00 Raytheon 100% / 120% 1000 / 700: 500 / 315Gm ST - used (wb) (H) four pillar tube - engraved base
1 6F7 $10.00 Raytheon 100% / 100% 1100 / 700: 400 / 315Gm ST - used (wb) (H) four pillar tube - engraved base - dirty label - reglued cap
1 6F7 / VT-70 $5.00 RCA 100% / 110% 950 / 700: 400 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 RCA 100% / 110% 1000 / 700: 400 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 RCA 100% / 110% 1000 / 700: 400 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 RCA 110% / 120% 1000 / 700: 450 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 RCA 110% / 110% 1050 / 700: 400 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Ken-Rad 100% / 120% 900 / 700: 450 / 315Gm ST - NOS (wb) (H)
1 6F7 / VT-70 $5.00 Ken-Rad 110% / 110% 1050 / 700: 450 / 315Gm ST - NOS (ob) (H) US Navy
1 6F7 / VT-70 $5.00 Ken-Rad 110% / 110% 1100 / 700: 400 / 315Gm ST - NOS (wb) (H) JAN
1 6F7 / VT-70 $5.00 Ken-Rad 100% / 110% 1100 / 700: 450 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Ken-Rad 100% / 100% 1150 / 700: 400 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Ken-Rad 100% / 110% 1150 / 700: 450 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 120% / 120% 1150 / 700: 550 / 315Gm ST - NOS (OB) (H) US Army - damaged box
1 6F7 / VT-70 $5.00 Sylvania 120% / 130% 1100 / 700: 600 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 130% / 120% 1250 / 700: 600 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 110% / 120% 1150 / 700: 500 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 110% / 120% 1150 / 700: 550 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 110% / 130% 1350 / 700: 600 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 / VT-70 $5.00 Sylvania 110% / 110% 1150 / 700: 500 / 315Gm ST - NOS (OB) (H) US Army
1 6F7 $5.00 RCA 100% / 100% 1000 / 700: 400 / 315Gm ST - NOS (ob) (H)
1 6F7 $5.00 RCA 110% / 120% 1200 / 700: 450 / 315Gm ST - NOS (OB) (H) oem box
1 6F7 $5.00 Ken-Rad 110% / 110% 1150 / 700: 450 / 315Gm ST - NOS (OB) (H) cat:402-422
1 6F7 $5.00 GE 110% / 120% 1100 / 700: 500 / 315Gm ST - NOS (OB) (H)
1 6F7 $5.00 Zenith 110% / 110% 1250 / 700: 400 / 315Gm ST - NOS (OB) (H)
1 6F7 $5.00 Raytheon 100% / 120% 950 / 700: 500 / 315Gm ST - NOS (OB) (H)
1 6F7 $5.00 Raytheon 110% / 130% 1200 / 700: 500 / 315Gm ST - NOS (OB) (H) sealed in box - cat:401-4-1
1 6F7 $5.00 Raytheon 120% / 120% 1300 / 700: 450 / 315Gm ST - NOS (OB) (H) sealed in box - cat:401-4-2
1 6F7 $5.00 Tung-Sol 120% / 120% 1100 / 700: 400 / 315Gm ST - NOS (OB) (H)
1 6F7 $5.00 Tung-Sol 100% / 110% 1000 / 700: 400 / 315Gm ST - NOS (OB) (H)
1 6F7 $5.00 Philco 100% / 100% 1150 / 700: 400 / 315Gm ST - NOS (OB) (H)
1 NU-6F7 $4.00 National Union 100% / 120% 1100 / 700: 600 / 315Gm ST - used (L) (H) engraved base
1 NU-6F7 $4.00 National Union 100% / 110% 1100 / 700: 500 / 315Gm ST - used (L) (H) engraved base
1 NU-6F7 $4.00 National Union 90% / 120% 1100 / 700: 550 / 315Gm ST - used (L) (H) engraved base
1 6F7 / VT-70 $4.00 Ken-Rad 110% / 110% 1150 / 700: 450 / 315Gm ST - used (L) (H) JAN
1 6F7 / VT-70 $4.00 Ken-Rad 110% / 120% 1100 / 700: 500 / 315Gm ST - used (L) (H) JAN
1 6F7 $3.00 Sylvania 100% / 120% 1050 / 700: 500 / 315Gm ST - used (ob) (H)
1 6F7 $3.00 Raytheon 110% / 110% 1200 / 700: 400 / 315Gm ST - used (rb) (H)
1 6F7 $3.00 RCA 100% / 120% 1100 / 700: 450 / 315Gm ST - used (L) (H)
1 6F7 $3.00 Crosley by Ken-Rad 110% / 120% 1150 / 700: 500 / 315Gm ST - used (L) (H) engraved base
1 6F7 $3.00 Wards Super Airline 100% / 130% 1100 / 700: 600 / 315Gm ST - used (L) (H)
1 6F7 $3.00 Sylvania 110% / 100% 1100 / 700: 500 / 315Gm ST - used (L) (H) leaky (2Mohm)
1 6F7 $2.00 Raytheon 90% / 110% 1000 / 700: 450 / 315Gm ST - used (ob) (H)
1 6F7 $2.00 RCA 90% / 90% 1000 / 700: 350 / 315Gm ST - used (rb) (H) engraved base
1 6F7 $2.00 RCA 90% / 110% 1000 / 700: 450 / 315Gm ST - used (ob) (H)
1 6F7 $2.00 GE 90% / 110% 900 / 700: 400 / 315Gm ST - used (rb) (H) in old Ken-Rad box
1 6F7 $2.00 RCA 90% / 110% 1000 / 700: 450 / 315Gm ST - used (L) (H) engaved base
1 6F7 $2.00 RCA / Cunningham 90% / 100% 1000 / 700: 450 / 315Gm ST - used (L) (H) engraved base
1 6F7 $2.00 RCA / Cunningham 100% / 90% 1100 / 700: 350 / 315Gm ST - used (L) (H) engraved base
1 6F7 $2.00 RCA / Cunningham 100% / 90% 1150 / 700: 350 / 315Gm ST - used (L) (H) engraved base
1 6F7 $2.00 Ken-Rad 90% / 110% 1100 / 700: 450 / 315Gm ST - used (L) (H) engaved base
1 6F7 $2.00 Wards Super Airline 90% / 100% 1100 / 700: 400 / 315Gm ST - used (L) (H) engraved base
1 6F7 $2.00 Crosley by Ken-Rad 100% / 140% 1150 / 700: 550 / 315Gm ST - used (L) (H) engraved base - paint on tube

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