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 T-75 $15.00 Triad 115% diodes: 120% / 120% 800 / 750Gm ST - NOS (OB) engraved base
1 75 $22.00 Raytheon 110% diodes: 120% / 130% 750 / 750Gm ST - NOS (wb) engraved base - four pillar tube (pl)
1 75 $20.00 Raytheon 120% diodes: 120% / 120% 800 / 750Gm ST - NOS (wb) engraved base - four pillar tube - torn label
1 75 $20.00 Raytheon 120% diodes: 110% / 120% 800 / 750Gm ST - NOS (wb) engraved base - four pillar tube - torn label
1 75 $18.00 Raytheon 125% diodes: 115% / 115% 850 / 750Gm ST - used (wb) engraved base - four pillar tube (pl)
1 75 $15.00 Raytheon 100% diodes: 100% / 110% 750 / 750Gm ST - used (wb) engraved base - four pillar tube - torn label
1 75 $17.00 Raytheon 125% diodes: 115% / 115% 750 / 750Gm ST - used (wb) engraved base - four pillar tube - torn label
1 75 $14.00 Raytheon 110% diodes: 115% / 90% 800 / 750Gm ST - used (wb) engraved base - four pillar tube - torn label
1 75 $10.00 Raytheon 120% diodes: 80% / 80% 850 / 750Gm ST - used (L) engraved base - four pillar tube - no label
1 75 / VT-75 $24.00 Sylvania 120% diodes: 120% / 120% 850 / 750Gm ST - NOS (wb) JAN
1 75 $20.00 Sylvania 110% diodes: 120% / 110% 750 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 Sylvania 125% diodes: 115% / 115% 850 / 750Gm ST - NOS (wb) ---
1 75 $20.00 Sylvania 115% diodes: 120% / 120% 750 / 750Gm ST - NOS (OB) ---
1 75 $20.00 Raytheon 120% diodes: 120% / 110% 850 / 750Gm ST - NOS (wb) engraved base (pl)
1 75 $20.00 Philco 120% diodes: 120% / 120% 800 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 Tung-Sol 120% diodes: 120% / 120% 800 / 750Gm ST - NOS (wb) ---
1 75 $20.00 Tung-Sol 110% diodes: 115% / 120% 750 / 750Gm ST - NOS (wb) ---
1 75 $20.00 Tung-Sol 110% diodes: 115% / 115% 750 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 National Union 110% diodes: 110% / 120% 750 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 RCA / Cunningham 110% diodes: 115% / 115% 800 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 RCA / Cunningham 100% diodes: 115% / 115% 800 / 750Gm ST - NOS (wb) engraved base
1 75 $20.00 Arcturus 120% diodes: 120% / 110% 750 / 750Gm ST - NOS (wb) ---
1 75 $20.00 RCA 110% diodes: 120% / 120% 800 / 750Gm ST - NOS (OB) ---
1 75 $20.00 Wards Super Airline 120% diodes: 110% / 110% 850 / 750Gm ST - NOS (wb) engraved base
1 75 $12.00 RCA / Cunningham 100% diodes: 110% / 110% 700 / 750Gm ST - used (rb) engraved base
1 75 $12.00 Philco 120% diodes: 110% / 120% 800 / 750Gm ST - used (rb) engraved base
1 75 $12.00 Sylvania 110% diodes: 120% / 115% 750 / 750Gm ST - used (rb) engraved base
1 75 $12.00 Ken-Rad 105% diodes: 115% / 115% 850 / 750Gm ST - used (rb) engraved base - cat:32-141
1 75 $12.00 Philco 130% diodes: 110% / 120% 900 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 110% diodes: 120% / 120% 800 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 110% diodes: 120% / 120% 750 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 140% diodes: 110% / 110% 950 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 130% diodes: 110% / 120% 900 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 120% diodes: 120% / 110% 850 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 110% diodes: 115% / 110% 750 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 130% diodes: 120% / 110% 950 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 110% diodes: 120% / 120% 800 / 750Gm ST - used (L) engraved base
1 75 $12.00 RCA / Cunningham 100% diodes: 120% / 115% 700 / 750Gm ST - used (L) engraved base
1 75 $12.00 Tung-Sol 110% diodes: 110% / 100% 800 / 750Gm ST - used (L) engraved base
1 75 $12.00 Tung-Sol 110% diodes: 115% / 110% 800 / 750Gm ST - used (L) engraved base
1 75 $12.00 Zenith 120% diodes: 120% / 120% 850 / 750Gm ST - used (L) engraved base - cat:403-126
1 75 $12.00 Zenith 110% diodes: 120% / 120% 750 / 750Gm ST - used (L) engraved base
1 75 $12.00 Zenith 115% diodes: 120% / 120% 850 / 750Gm ST - used (L) engraved base
1 75 $12.00 GM 130% diodes: 120 / 120% 900 / 750Gm ST - used (L) engraved base
1 75 $12.00 Kadette 110% diodes: 110% / 120% 750 / 750Gm ST - used (L) engraved base
1 75 $12.00 Philco 110% diodes: 110% / 110% 700 / 750Gm ST - used (L) engraved base
1 75 $10.00 Silvertone 110% diodes: 120% / 120% 750 / 750Gm ST - used (wb) ---
1 75 $10.00 RCA 125% diodes: 110% / 120% 850 / 750Gm ST - used (ob) ---
1 75 $10.00 RCA 140% diodes: 120% / 120% 1050 / 750Gm ST - used (rb) ---
1 75 $10.00 RCA 120% diodes: 110% / 115% 850 / 750Gm ST - used (ob) ---
1 75 $10.50 RCA 120% diodes: 110% / 110% 900 / 750Gm ST - used (rb) ---
1 75 $10.00 Philco 110% diodes: 120% / 115% 750 / 750Gm ST - used (rb) ---
1 75 $10.00 GE 120% diodes: 120% / 120% 900 / 750Gm ST - used (rb) ---
1 75 $10.00 GE 90% diodes: 105% / 90% 650 / 750Gm ST - used (rb) ---
1 75 $10.00 Sylvania 110% diodes: 110% / 120% 750 / 750Gm ST - used (rb) cat:312-168
1 75 $10.00 Zenith 90% diodes: 105% / 115% 700 / 750Gm ST - used (rb) ---
1 75 $10.00 Raytheon 110% diodes: 120% / 120% 800 / 750Gm ST - used (ob) ---
1 75 $10.00 Wards Super Airline 115% diodes: 115% / 110% 850 / 750Gm ST - used (rb) ---
1 75 $10.00 Sylvania 110% diodes: 120% / 120% 750 / 750Gm ST - used (L) ---
1 75 $10.00 Sylvania 130% diodes: 110% / 110% 850 / 750Gm ST - used (L) ---
1 75 $10.00 Sylvania 110% diodes: 120% / 120% 800 / 750Gm ST - used (L) ---
1 75 $10.00 Philco 120% diodes: 115% / 115% 850 / 750Gm ST - used (L) ---
1 75 $10.00 Philco 120% diodes: 120% / 110% 900 / 750Gm ST - used (L) ---
1 75 $10.00 Raytheon 130% diodes: 120% / 110% 850 / 750Gm ST - used (L) ---
1 75 $10.00 Raytheon 120% diodes: 110% / 100% 800 / 750Gm ST - used (L) ---
1 75 $10.00 Tung-Sol 110% diodes: 110% / 120% 750 / 750Gm ST - used (L) ---
1 75 $10.00 Tung-Sol 120% diodes: 100% / 90% 750 / 750Gm ST - used (L) ---
1 75 $10.00 Tung-Sol 120% diodes: 120% / 110% 800 / 750Gm ST - used (L) ---
1 75 $10.00 Silvertone 135% diodes: 120% / 120% 850 / 750Gm ST - used (L) ---
1 75 $10.50 GE 100% diodes: 120% / 120% 750 / 750Gm ST - used (L) ---
1 75 $10.00 Ken-Rad 120% diodes: 110% / 115% 850 / 750Gm ST - used (L) ---
1 75 $10.00 RCA 120% diodes: 115% / 115% 800 / 750Gm ST - used (L) cat:312-196
1 75 $10.00 RCA 120% diodes: 120% / 115% 800 / 750Gm ST - used (L) ---
1 75 $10.00 RCA 110% diodes: 120% / 120% 750 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 120% diodes: 120% / 120% 800 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 110% diodes: 120% / 120% 800 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 130% diodes: 110% / 120% 800 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 130% diodes: 110% / 100% 900 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 110% diodes: 120% / 110% 800 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 110% diodes: 120% / 110% 800 / 750Gm ST - used (L) ---
1 75 $10.00 National Union 110% diodes: 120% / 120% 800 / 750Gm ST - used (L) ---
1 75 $10.00 Wards Super Airline 120% diodes: 120% / 105% 850 / 750Gm ST - used (L) ---
1 75 $10.00 Triad 120% diodes: 110% / 120% 900 / 750Gm ST - used (L) ---
1 75 $10.00 Triad 135% diodes: 115% / 115% 950 / 750Gm ST - used (L) ---
1 75 $10.00 Super Silvertone 120% diodes: 115% / 120% 850 / 750Gm ST - used (L) ---
1 VT-75 / 75 $10.00 Sylvania 105% diodes: 110 / 110% 700 / 750Gm ST - used (L) JAN
1 VT-75 / 75 $10.00 RCA 105% diodes: 120% / 120% 750 / 750Gm ST - used (L) JAN
1 75 $8.00 Ken-Rad 105% diodes: 120% / 115% 750 / 750Gm ST - used (L) engraved base
1 75 $8.00 RCA / Cunningham 100% diodes: 80% / 110% 700 / 750Gm ST - used (L) engraved base
1 75 $8.00 Sylvania 100% diodes: 120% / 120% 700 / 750Gm ST - used (L) engraved base
1 75 $8.00 Sylvania 100% diodes: 120% / 120% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Sylvania 100% diodes: 120% / 110% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 100% diodes: 110% / 110% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 100% diodes: 115% / 110% 750 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 100% diodes: 110% / 120% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 100% diodes: 120% / 115% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 100% diodes: 115% / 115% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $8.00 Philco 105% diodes: 115% / 110% 750 / 750Gm ST - used (L) engraved base
1 75 $8.00 Philco 105% diodes: 110% / 120% 750 / 750Gm ST - used (L) engraved base
1 75 $8.00 Philco 100% diodes: 110% / 110% 700 / 750Gm ST - used (L) engraved base
1 75 $7.50 Ken-Rad 100% diodes: 120% / 110% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 125% / 120% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 105% diodes: 120% / 120% 750 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 110% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 120% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 120% / 120% 750 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 115% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Sylvania 100% diodes: 120% / 120% 700 / 750Gm ST - used (L) ---
1 75 $7.50 RCA 100% diodes: 110% / 120% 700 / 750Gm ST - used (L) ---
1 75 $7.50 RCA Victor 105% diodes: 110% / 110% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Tung-Sol 100% diodes: 110% / 105% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Tung-Sol 100% diodes: 115% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Tung-Sol 100% diodes: 115% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 $7.50 National Union 100% diodes: 110% / 110% 700 / 750Gm ST - used (L)
1 75 $7.50 Zenith 100% diodes: 110% / 110% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $7.50 Zenith 105% diodes: 115% / 115% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Delco 100% diodes: 110% / 120% 700 / 750Gm ST - used (L) ---
1 75 $7.50 Hytron 100% diodes: 105% / 110% 750 / 750Gm ST - used (L) engraved base
1 75 $6.00 Wards Super Airline 95% diodes: 110% / 110% 600 / 750Gm ST - used (L) engraved base
1 75 $6.00 Kadette 95% diodes: 80% / 110% 700 / 750Gm ST - used (L) engraved base
1 75 $6.00 Sylvania 95% diodes: 115% / 115% 650 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Sylvania 90% diodes: 115% / 110% 650 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Sylvania 90% diodes: 110% / 115% 700 / 750Gm ST - used (L) ---
1 75 $6.00 Sylvania 90% diodes: 105% / 115% 650 / 750Gm ST - used (L) ---
1 75 $6.00 Sylvania 90% diodes: 110% / 115% 650 / 750Gm ST - used (L) ---
1 75 $6.00 Sylvania 90% diodes: 110% / 105% 650 / 750Gm ST - used (L) ---
1 75 $6.00 Sylvania 90% diodes: 110% / 110% 700 / 750Gm ST - used (L) ---
1 75 $6.00 Tung-Sol 90% diodes: 110% / 120% 600 / 750Gm ST - used (L) ---
1 75 $6.00 Philco 95% diodes: 95% / 110% 700 / 750Gm ST - used (L) ---
1 75 $6.00 National Union 90% diodes: 110% / 110% 650 / 750Gm ST - used (L) ---
1 75 $6.00 National Union 90% diodes: 120% / 110% 750 / 750Gm ST - used (L) ---
1 75 $6.00 Philco 95% diodes: 120% / 120% 700 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Philco 90% diodes: 110% / 120% 650 / 7501m ST - used (L) engraved base - black coat
1 75 $6.00 Philco 90% diodes: 110% / 110% 650 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Philco 90% diodes: 120% / 120% 650 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Philco 90% diodes: 110% / 110% 650 / 750Gm ST - used (L) engraved base - black coat
1 75 $6.00 Philco 90% diodes: 110% / 120% 650 / 750Gm ST - used (L) engraved base
1 75 $6.00 Philco 90% diodes: 110% / 110% 550 / 750Gm ST - used (L) ---
1 75 $6.00 RCA 90% diodes: 105% / 110% 700 / 750Gm ST - used (L) ---
1 75 $6.00 RCA Radiotron 95% diodes: 95% / 80% 650 / 750Gm ST - used (L) ---
1 75 $6.00 RCA / Cunningham 90% diodes: 120% / 110% 650 / 750Gm ST - used (L) engraved base
1 75 $6.00 Crosley by Ken-Rad 90% diodes: 110% / 110% 700 / 750Gm ST - used (L) engraved base
1 75 $6.00 Tung-Sol 90% diodes: 110% / 115% 650 / 750Gm ST - used (L) ---
1 75 $6.00 Hytron 90% diodes: 90% / 110% 650 / 750Gm ST - used (L) ---
1 75 $6.00 Ken-Rad 90% diodes: 120% / 120% 600 / 750Gm ST - used (L) engraved base
1 75 $4.00 Sylvania 85% diodes: 115% / 115% 600 / 750Gm ST - used (L) ---
1 75 $4.00 National Union 85% diodes: 120% / 115% 600 / 750Gm ST - used (L) ---
1 75 $4.00 Sylvania 85% diodes: 110% / 120% 650 / 750Gm ST - used (L) ---
1 75 $4.00 Raytheon 85% diodes: 115% / 115% 600 / 750Gm ST - used (L) ---
1 75 $4.00 Raytheon 85% diodes: 105% / 100% 600 / 750Gm 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