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 30 / 1H4G $7.50 RCA 140% 1100 / 900Gm ST - used (L) 1H4G rebased (octal) to #30 base (4pin)
1 230 $25.00 Super Silvertone 150% 1450 / 900Gm ST - NOS (wb) engraved base (pl)
1 30 / VT-27* $20.00 Sylvania 120% 1250 / 900Gm ST - NOS (wb) ---
1 30 / VT-27* $20.00 Sylvania 110% 1000 / 900Gm ST - NOS (OB) JAN
1 30 / VT-27 $15.00 Sylvania 110% 1050 / 900Gm ST - used (L) ---
1 30 / VT-27* $15.00 RCA 120% 1000 / 900Gm ST - used (L) JAN
1 30 / VT-27* $15.00 RCA 140% 1250 / 900Gm ST - used (L) JAN
1 30 $20.00 RCA 110% 1200 / 900Gm ST - NOS (wb) US Navy
1 30 $20.00 RCA 130% 1000 / 900Gm ST - NOS (wb) ---
1 30 $20.00 RCA 120% 1200 / 900Gm ST - NOS (OB) damaged box
1 30 $20.00 Philco 130% 1100 / 900Gm ST - NOS (wb) engraved base
1 30 $20.00 Wards Super Airline 140% 1500 / 900Gm ST - NOS (wb) ---
1 30 $20.00 Wards Super Airline 110% 1100 / 900Gm ST - NOS (wb) ---
1 30 $20.00 Super Airline 140% 1200 / 900Gm ST - NOS (wb) engraved base (pl)
1 30 $20.00 Sylvania 120% 1150 / 900Gm ST - NOS (wb) ---
1 30 $20.00 Sylvania 140% 1050 / 900Gm ST - NOS (ob) damaged box
1 30 $20.00 Philco 110% 1000 / 900Gm ST - NOS (OB) ---
1 30 $20.00 Philco 100% 1000 / 900Gm ST - NOS (OB) ---
1 30 $20.00 Super Silvertone 140% 1150 / 900Gm ST - NOS (wb) ---
1 30 $20.00 RCA 150% 1200 / 900Gm ST - NOS (ob) damaged box - cat:403-100
1 30 $20.00 National Union 140% 1350 / 900Gm ST - NOS (OB) engraved base - damaged box
1 30 $12.00 Raytheon 130% 1250 / 900Gm ST - used (rb) ---
1 30 $12.00 RCA 130% 1250 / 900Gm ST - used (ob) damaged box
1 30 $12.00 Sylvania 100% 950 / 900Gm ST - used (ob) engraved base
1 30 $12.00 RCA / Cunningham 140% 1250 / 900Gm ST - used (rb) engraved base
1 30 $12.00 National Union 140% 1200 / 900Gm ST - used (ob) engraved base - damaged box
1 30 $12.00 National Union 120% 1050 / 900Gm ST - used (ob) engraved base - damaged box
1 30 $12.00 Wards Super Airline 140% 1150 / 900Gm ST - used (rb) engraved base
1 30 $12.00 Wards Super Airline 140% 1400 / 900Gm ST - used (L) engraved base
1 30 $12.00 Wards Super Airline 140% 1300 / 900Gm ST - used (L) engraved base
1 30 $12.00 Wards Super Airline 120% 1200 / 900Gm ST - used (L) engraved base
1 30 $12.00 Wards Super Airline 130% 1200 / 900Gm ST - used (L) ---
1 30 $12.00 Coronado 120% 1100 / 900Gm ST - used (L) engraved base
1 30 $12.00 Sylvania 125% 1100 / 900Gm ST - used (L) ---
1 30 $12.00 Sylvania 115% 1050 / 900Gm ST - used (L) ---
1 30 $12.00 Tung-Sol 120% 1050 / 900Gm ST - used (L) ---
1 30 $12.00 Philco 120% 1100 / 900Gm ST - used (L) engraved base
1 30 $12.00 Philco 140% 1200 / 900Gm ST - used (L) engraved base
1 30 $12.00 Philco 140% 1100 / 900Gm ST - used (L) engraved base
1 30 $12.00 Philco 120% 1100 / 900Gm ST - used (L) engraved base
1 30 $12.00 Philco 120% 1150 / 900Gm ST - used (L) engraved base
1 30 $12.00 Philco 115% 1000 / 900Gm ST - used (L) ---
1 30 $12.00 National Union 110% 1000 / 900Gm ST - used (L) engraved base
1 30 $12.00 National Union 120% 1150 / 900Gm ST - used (L) engraved base
1 30 $12.00 National Union 140% 1250 / 900Gm ST - used (L) engraved base (pl)
1 30 $12.00 RCA 120% 1050 / 900Gm ST - used (L) ---
1 30 $12.00 RCA 120% 1050 / 900Gm ST - used (L) ---
1 30 $12.00 RCA 140% 1300 / 900Gm ST - used (L) ---
1 30 $12.00 RCA 120% 1000 / 900Gm ST - used (L) ---
1 30 $12.00 RCA / Cunningham 140% 1100 / 900Gm ST - used (L) engraved base
1 30 $12.00 Ken-Rad 90% 750 / 900Gm ST - used (L) engraved base
1 30 $12.00 GE 120% 1200 / 900Gm ST - used (L) ---
1 30 $12.00 GE 120% 1200 / 900Gm ST - used (L) ---
1 30 $12.00 Westinghouse 110% 1000 / 900Gm ST - used (L) ---
1 30 $12.00 Auburn 140% 1400 / 900Gm ST - used (L) ---
1 30 $12.00 unknown 110% 1050 / 900Gm ST - used (L) ---
1 30 $5.00 Sylvnania 85% 850 / 900Gm ST - used (L) ---
1 30 $5.00 Wards 85% 900 / 900Gm ST - used (L) engraved base
1 30 $5.00 Zenith 85% 950 / 900Gm ST - used (ob) ---
1 231 $35.00 Sylvania 105% 1200 / 925Gm ST - NOS (wb) ---
1 231 $25.00 Super Silvertone 120% 1300 / 925Gm ST - used (OB) engraved base
1 31 $25.00 RCA / Cunningham 110% 1100 / 925Gm ST - NOS (wb) engraved base
1 31* $20.00 Philco 100% 1400 / 925Gm ST - NOS (OB) sealed in box
1 31* $20.00 Philco 100% 1400 / 925Gm ST - NOS (OB) ---
1 31 $20.00 Sylvania 100% 1400 / 925Gm ST - NOS (ob) damaged box
1 31 $20.00 National Union 100% 1550 / 925Gm ST - NOS (OB) ---
1 31 $20.00 Arcturus 110% 1150 / 925Gm ST - NOS (ob) damaged box
1 31 $20.00 RCA / Cunningham 120% 1250 / 925Gm ST - NOS (OB) sealed in box
1 31 $20.00 RCA Victor 150% 1550 / 925Gm ST - NOS (wb) ---
1 31 $20.00 Ken-Rad 140% 1550 / 925Gm ST - NOS (wb) ---
1 31* $20.00 Raytheon 100% 1300 / 925Gm ST - NOS (OB) sealed in box
1 31* $20.00 Raytheon 100% 1300 / 925Gm ST - NOS (OB) ---
1 31 $12.00 GE 110% 1100 / 925Gm ST - used (rb) ---
1 31 $12.00 National Union 120% 1300 / 925Gm ST - used (L) cat:321-96

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