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 5Z3 $20.00 Sylvania 100% / 100% --- ST - NOS ---
1 5Z3 $10.00 Sylvania 100% / 100% --- ST - used hanging filament (p19)
1 5Z3 $10.00 Sylvania 100% / 100% --- ST - used hanging filament (p19)
1 5Z3 $10.00 National Union 100% / 100% --- ST - used (L) ---
1 5Z3 $10.00 Marconi 100% / 100% --- ST - used (L) ---
1 5Z3 / VT-145 $7.50 National Union 95% / 90% --- ST - used (L) bottom getter - JAN
1 5Z3 / VT-145 $7.50 RCA 90% / 95% --- ST - used (L) bottom getter - JAN
1 5Z3 $7.50 GE 95% / 100% --- ST - used (L) bottom getter
1 5Z3 $7.50 GE 100% / 95% --- ST - used (L) bottom getter
1 5Z3 $7.50 GE 100% / 95% --- ST - used (L) bottom getter
1 5Z3 $7.50 National Union 90% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 National Union 95% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 National Union 90% / 100% --- ST - used (L) bottom getter
1 5Z3 $7.50 National Union 100% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 National Union 90% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 RCA 90% / 90% --- ST - used (L) bottom getter - cat:402-114
1 5Z3 $7.50 RCA 90% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 RCA 95% / 90% --- ST - used (L) bottom getter
1 5Z3 $7.50 Raytheon 90% / 100% --- ST - used (L) bottom getter
1 5Z3 $7.50 Raytheon 90% / 90% --- ST - used (L) bottom getter (pl)
1 5Z3 $7.50 Cunningham 95% / 95% --- ST - used (L) bottom getter
1 5Z3 $7.50 CBS / Hytron 90% / 90% --- ST - used (L) top getter
1 5Z3 $7.50 Rogers 90% / 90% --- ST - used (L) bottom getter
1 5Z3 / VT-145 $5.00 RCA 100% / 80% --- ST - used (L) bottom getter - JAN
1 5Z3 $5.00 Cunningham 85% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 Delco 85% / 90% --- ST - used (L) top getter
1 5Z3 $5.00 GE 80% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 National Union 80% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 National Union 80% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 National Union 95% / 85% --- ST - used (L) bottom getter
1 5Z3 $5.00 Sylvania 85% / 85% --- ST - used (L) bottom getter - hanging filament (p19)
1 5Z3 $5.00 Sylvania 80% / 90% --- ST - used (L) bottom getter - hanging filament (p19)
1 5Z3 $5.00 RCA 85% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 RCA 85% / 90% --- ST - used (L) bottom getter
1 5Z3 $5.00 RCA 80% / 80% --- ST - used (L) bottom getter
1 5Z3 $5.00 Tung-Sol 80% / 80% --- ST - used (L) top getter
1 25Y5 $15.00 National Union untested --- ST - NOS (OB) sealed in box
1 25Y5 $10.00 unknown 110% / 110% --- ST - used (rb) ---

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