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 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (wb) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (wb) JAN - cat:401-160
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (ob) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (ob) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (ob) ---
1 25Z5GT $5.00 RCA 110% / 110% --- ST - NOS (ob) ---
1 25Z5GT $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 Raytheon 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 Raytheon 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 GE 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 GE 110% / 110% --- ST - NOS (OB) ---
1 25Z5GT $5.00 GE 110% / 110% --- ST - NOS (OB) torn box flap
1 25Z5GT $5.00 Tung-Sol 110% / 110% --- ST - NOS (OB) cat:312-359
1 25Z5GT $5.00 Tung-Sol 110% / 110% --- ST - NOS (wb) cat:312-361
1 25Z5GT $3.00 GE 110% / 110% --- ST - used (ob) damaged box
1 25Z5GT $3.00 GE 110% / 110% --- ST - used (ob) ---
1 25Z5GT $3.00 CBS / Hytron 110% / 110% --- ST - used (L) --- (P16)
1 25Z5GT $3.00 Raytheon 110% / 110% --- ST - used (L) --- (P16)
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) damaged box
1 25Z5 $5.00 Wards Airline 110% / 110% --- ST - NOS (OB) damaged box
1 25Z5 $5.00 Delco 110% / 110% --- ST - NOS (OB) damaged box
1 25Z5 $5.00 Raytheon 110% / 110% --- ST - NOS (OB) damaged box
1 25Z5 $5.00 Hytron untested --- ST - NOS (OB) JAN - sealed in box - cat:312-333
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) JAN
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) JAN
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (wb) cat:402-295
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) sealed in box
1 25Z5 $5.00 National Union 110% / 115% --- ST - NOS (OB) ---
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 National Union 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 CBS / Hytron 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 CBS / Hytron 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 CBS / Hytron 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 CBS / Hytron 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 GE 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Tung-Sol 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Tung-Sol 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Tung-Sol 110% / 110% --- ST - NOS (OB) cat:312-360
1 25Z5 $5.00 RCA 110% / 110% --- ST - NOS (wb) ---
1 25Z5 $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 RCA 110% / 110% --- ST - NOS (OB) cat:401-481
1 25Z5 $5.00 RCA 110% / 110% --- ST - NOS (OB) cat:312-362
1 25Z5 $5.00 RCA 110% / 110% --- ST - NOS (OB) ---
1 25Z5 $5.00 Cunningham 110% / 110% --- ST - NOS (OB) damaged box
1 25Z5 $5.00 Ken-Rad 110% / 110% --- ST - NOS (OB) water damaged box - cat:401-477
1 25Z5 $5.00 Ken-Rad 110% / 110% --- ST - NOS (OB) water damaged box - cat:401-476
1 25Z5 $5.00 Ken-Rad 110% / 110% --- ST - NOS (OB) water damaged box - cat:401-474
1 25Z5 $5.00 Ken-Rad 110% / 110% --- ST - NOS (OB) damaged box - cat:401-482
1 25Z5 $5.00 Ken-Rad 110% / 110% --- ST - NOS (OB) cat:401-490
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) JAN - cat:401-496
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) JAN - cat:401-500
1 25Z5 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) JAN - cat:401-501
1 25Z5 / 38255 $5.00 Sylvania 110% / 110% --- ST - NOS (OB) US Navy - cat:401-91 - damaged box
1 25Z5 $5.00 Silvertone 110% / 110% --- ST - NOS (OB) cat:401-485
1 25Z5 $3.00 Ken-Rad 100% / 100% --- ST - used (ob) ---
1 25Z5 $3.00 CBS / Hytron 100% / 100% --- ST - used (ob) engraved base - damaged box - cat:312-60
1 25Z5 $3.00 Sylvania 110% / 110% --- ST - used (rb) ---
1 25Z5 $3.00 Sylvania 110% / 110% --- ST - used (rb) damaged box
1 25Z5 $3.00 GE 100% / 95% --- ST - used (rb) ---
1 25Z5 $3.00 GE 100% / 95% --- ST - used (rb) ---
1 25Z5 $3.00 Tung-Sol 110% / 110% --- ST - used (ob) ---
1 25Z5 $3.00 Sylvania 110% / 110% --- ST - used (rb) cat:401-484
1 25Z5 $3.00 National Union 110% / 110% --- ST - used (L) --- (P16)
1 25Z5 $3.00 National Union 100% / 105% --- ST - used (L) JAN (P16)
1 25Z5 $3.00 National Union 105% / 100% --- ST - used (L) --- (P16)
1 25Z5 $3.00 National Union 100% / 100% --- ST - used (L) --- (P16)
1 25Z5 $3.00 National Union 100% / 100% --- ST - used (L) paint on tube (P16)
1 25Z5 $3.00 National Union 110% / 110% --- ST - used (L) ---
1 25Z5 $3.00 National Union 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 National Union 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 National Union 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 National Union 110% / 105% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 National Union 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 National Union 110% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 National Union 100% / 100% --- used (L) cat:401-131 (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 110% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 105% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 RCA Victor 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 100% / 100% --- ST - used (L) cat:402-122 (P16)
1 25Z5 $3.00 Tung-Sol 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Tung-Sol 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 110% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 110% / 100% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 Sylvania 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Sylvania 110% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Philco 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Philco 110% / 110% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 Philco 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Philco 110% / 110% --- ST - used (L) cat:312-12 (P16)
1 25Z5 $3.00 Philco 110% / 110% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 Philco 110% / 110% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 Arcturus 110% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Arcturus 100% / 100% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Arcturus 110% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Arcturus 105% / 105% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Arcturus 100% / 110% --- ST - used (L) -- (P16)
1 25Z5 $3.00 Westinghouse 110% / 110% --- ST - used (L) cat:321-132 (P16)
1 25Z5 $3.00 Cunningham 110% / 110% --- ST - used (L) cat:312-186 (P16)
1 25Z5 $3.00 Cunningham 105% / 110% --- ST - used (L) engraved base (P16)
1 25Z5 $3.00 GE 100% / 100% --- ST - used (L) --- (P16)
1 25Z5 $3.00 Emerson 100% / 105% --- ST - used (L) --- (P16)
1 25Z5 $3.00 Kadette 105% / 105% --- ST - used (L) --- (P16)
1 25Z5 $3.00 Ken-Rad 110% / 110% --- ST - used (L) --- (P16)
1 25Z5 $3.00 Unkown 110% / 110% --- ST - used (L) --- (P16)
1 25Z5 $3.00 Sylvania 105% / 110% --- ST - used (L) --- (P16)

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