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 12A5 $15.00 Raytheon 110% 2200 / 1800Gm ST - used (wb) four pillar tube - engraved base - cat:403-333
1 12A5 $15.00 Raytheon 110% 2250 / 1800Gm ST - used (wb) four pillar tube - engraved base
1 12A5E $10.00 Philco 120% 2300 / 1800Gm ST - NOS (OB) cat:401-83-1
1 12A5E $10.00 Philco 120% 2400 / 1800Gm ST - NOS (OB) cat:401-83-2
1 12A5E $10.00 Philco 120% 2450 / 1800Gm ST - NOS (OB) cat:401-83-3
1 12A5 $10.00 Cunningham 100% 2400 / 1800Gm ST - NOS (OB) sealed in box
1 12A5 $10.00 Cunningham 100% 2200 / 1800Gm ST - NOS (OB) sealed in box
1 12A5 $10.00 Philco 120% 2600 / 1800Gm ST - NOS (OB) sealed in box
1 12A5 $10.00 Philco 120% 2500 / 1800Gm ST - NOS (OB) sealed in box
1 12A5 $10.00 Ken-Rad untested heater ok ST - NOS (OB) sealed in box
1 12A5 $5.00 Philco 120% 2400 / 1800Gm ST - used (ob) engraved base - damaged box
1 12A5 $5.00 Philco 120% 2700 / 1800Gm ST - used (L) engraved base cat:402-344
1 12A5 $5.00 Tung-Sol 120% 2550 / 1800Gm ST - used (L) engraved base cat:402-343
1 12A7 $7.50 Delco 130%: diode 110% 1600 / 610Gm ST - NOS (OB) (H) sealed in box
1 12A7 $7.50 Philco 110%: diode 110% 1200 / 610Gm ST - NOS (OB) (H) sealed in box
1 12A7 $7.50 GE 110%: diode 110% 1350 / 610Gm ST - NOS (OB) (H) damaged box
1 12A7 $7.50 National Union 120%: diode 110% 1250 / 610Gm ST - NOS (wb) (H) engraved base
1 12A7 $7.50 National Union 120%: diode 120% 1500 / 610Gm ST - NOS (OB) (H)
1 12A7 $7.50 National Union 110%: diode 115% 1400 / 610Gm ST - NOS (OB) (H)
1 12A7 $7.50 Ken-Rad 120%: diode 120% 1500 / 610Gm ST - NOS (OB) (H) sealed in box - damaged box
1 12A7 $7.50 Sylvania 115%: diode 110% 1250 / 610Gm ST - NOS (OB) (H) sealed in box
1 12A7 $7.50 Sylvania 110%: diode 120% 1250 / 610Gm ST - NOS (OB) (H) sealed in box
1 12A7 $7.50 Sylvania 115%: diode 110% 1250 / 610Gm ST - NOS (wb) (H)
1 12A7 $7.50 RCA 120%: diode 110% 1500 / 610Gm ST - NOS (OB) (H)
1 12A7 $7.50 RCA 120%: diode 110% 1500 / 610Gm ST - NOS (wb) (H) cat:402-338
1 12A7 $7.50 GE 110%: diode 110% 1350 / 610Gm ST - NOS (wb) (H)
1 12A7 $7.50 Raytheon 120%: diode 120% 1500 / 610Gm ST - NOS (wb) (H)
1 12A7 $7.50 Raytheon 120%: diode 120% 1650 / 610Gm ST - NOS (OB) (H) sealed in box
1 12A7 $4.00 Sylvania 120%: diode 120% 1300 / 610Gm ST - used (rb) (H)
1 12A7 $4.00 Arcturus 120%: diode 110% 1350 / 610Gm ST - used (rb) (H) engraved base - cat:312-55
1 12A7 $4.00 RCA 120%: diode 110% 1500 / 610Gm ST - used (L) (H)
1 12A7 $4.00 Cunningham 120%: diode 110% 1450 / 610Gm ST - used (L) (H)
1 12A7 $4.00 National Union 100%: diode 110% 1100 / 610Gm ST - used (L) (H) engraved base
1 12A7 $2.50 Tung-Sol 90%: diode 100% 1300 / 610Gm ST - used (L) (H) engraved base
1 12A7 $2.50 GE 130%: diode 120% 1600 / 610Gm ST - used (ob) (H) loose base - cat:402-341
1 12Z3 $5.00 National Union 100% --- ST - NOS (OB) engraved base
1 12Z3 $5.00 RCA 110% --- ST - NOS (OB) sealed in box
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) sealed in box - damaged box
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) sealed in box
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) engraved base
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) engraved base
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) engraved base
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) engraved base - box flap missing
1 12Z3 $5.70 Philco 110% --- ST - NOS (OB) cat:401-84-1
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) cat:401-84-2 - damaged box
1 12Z3 $5.00 Philco 110% --- ST - NOS (OB) cat:401-84-3
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) water damaged box
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) water damaged box
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) water damaged box
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) water damaged box
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) water damaged box
1 12Z3 $5.00 Sylvania 110% --- ST - NOS (OB) box flap missing
1 12Z3 $5.00 Tung-Sol 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Tung-Sol 110% --- ST - NOS (OB) ---
1 12Z3 $5.00 Raytheon 110% --- ST - NOS (OB) cat:401-559
1 12Z3 $5.00 Raytheon 110% --- ST - NOS (OB) cat:401-567
1 12Z3 $5.00 RCA Victor 110% --- ST - NOS (OB) box flap missing
1 12Z3 $5.00 National Union 110% --- ST - NOS (OB) ---
1 12Z3 $3.00 Sylvania 110% --- ST - used (wb) ---
1 12Z3 $3.00 Hytron 110% --- ST - used (wb) ---
1 12Z3 $3.00 RCA 100% --- ST - used (L) ---
1 12Z3 $3.00 Super Silvertone 100% --- ST - used (L) ---
1 12Z3 $3.00 Admiral 110% --- ST - used (L) cat:403-325

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