MDB Ventures Low Grade Tubes


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Save on low grade tubes!

Some tubes fail testing because they have a weak output, are leaky, or have a minor defect such as a missing cap. These tubes can still be usable to experimenters, as backup tubes, or in an undemanding service may still operate as well as a new tube. We offer them here at a reduced price.

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, miniature, subminiature, metal, power, transmitter tubes and many more.

MDB Ventures Low Grade Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 1U5 $1.00 unknown 80% diode: 110% 500 / 525Gm used fair (L) (M7) (cat:LA-1)
1 1R5 $1.00 RCA 120% 950 / 525Gm used good (L) (M7) (cat:LA-1)
1 1S5 $1.00 Raytheon 85% diode: 100% 600 / 525Gm used good (L) (M7) (cat:LA-1)
1 2C40 $2.00 RCA 90% 3000 / 2800Gm Used Leaky (1M) ---
1 2C40 $2.00 GE 70% 3000 / 2800Gm Used fair ---
1 2C43 $1.50 GE 70% 3200 / 4000Gm Used fair ---
1 2C43 $1.50 GE 75% 3600 / 4000Gm Used fair ---
1 2C43 $1.50 GE 80% 3800 / 4000Gm Used fair ---
1 2C43 $1.00 GE 70% 3800 / 4000Gm Used Leaky (3M) ---
1 2C43 $1.00 GE 90% 4700 / 4000Gm Used Leaky (2M) ---
1 2C43 $1.00 GE 80% 4000 / 4000Gm Used Leaky (3M) ---
1 2C43 $1.00 GE 80% 4100 / 4000Gm Used Leaky (2M) ---
1 2C43 $1.00 GE 60% 3000 / 4000Gm Used Leaky (2M) ---
1 2DV4 $1.00 Zenith 60% --- used fair (rb) Nuvistor (cat:LA-1)
1 5R4GY $2.00 RCA 100% / 105% --- used good brown base - broken locator pin
1 5R4WGB $1.00 Raytheon 60% / 80% --- Used Fair JAN Gray base
1 5R4WGA $1.00 Chatham 50% / 50% --- Used Fair JAN Tan base
1 5R4WGY $1.00 Chatham 60% / 60% --- Used Fair JAN Brown base
1 5R4WGY $2.00 Chatham 110% / 110% --- Used JAN Brown base - white particles inside
1 6AR6 $1.50 Tung-Sol 70% 4400 / 5400Gm Used Fair (GT) brown base - JAN
1 6AR6 $2.00 Tung-Sol 75% 4800 / 5400Gm Used Fair (GT) brown base - JAN
1 6AR6 $2.50 Tung-Sol 80% 5000 / 5400Gm Used Fair (GT) brown base - JAN
1 6AR6 $2.50 Tung-Sol 80% 5000 / 5400Gm Used Fair (GT) brown base - JAN
1 6AR6 $1.00 Tung-Sol 110% 6700 / 5400Gm Used Leaky (GT) brown base - JAN
1 6AR6 $1.00 Tung-Sol 60% 4100 / 5400Gm Used Leaky (GT) brown base - JAN
1 6AR6 $1.50 Tung-Sol 70% 4400 / 5400Gm Used Fair (GT) brown base
1 6DS4 $1.00 RCA 80% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 80% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 80% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 80% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 75% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 70% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 70% --- used fair (rb) Nuvistor (cat:La-1)
1 6DS4 $1.00 RCA 65% --- used fair (rb) Nuvistor - light rust on tube (cat:La-1)
1 6ML8 $0.50 unknown 110% / 105% / 110% 90 / 80 / 90dmc used leaky (2M) (OB) (cat:La-1)
1 6ML8 $0.50 Sylvania 130% / 135% / 130% 110 / 120 / 115dmc used leaky (2M) (OB) (cat:La-1)
1 6ML8 $0.50 unknown 70% / 100% / 100% 50 / 70 / 80dmc used leaky (1M) (L) (cat:La-1)
1 407A $2.50 Westinghouse 70% / 65% --- used (rb) (M9)
1 446A $2.00 GE 110% 3200 / 1560Gm Used Leaky (500K) ---
1 446A $2.00 GE 70% 4200 / 1560Gm Used fair ---
1 446A $1.00 RCA 50% 2300 / 1560Gm Used weak ---
1 NU-615 / VT-235 $5.00 Philco 100% 2300 / 2200Gm used leaky (5M) rabbit ear tube - similar to E1148
1 1619 $2.50 RCA 30% 1100 / 3400Gm Used weak (rb) 2.5V 6L6 - metal tube - in Addison TV Parts Ltd Montreal box
1 5894 $1.50 GE 140% / 100% --- used leaky (5M) (L) ---
1 5894 $1.50 Amperex 120% / 130% --- used leaky (2M) (L) ---
1 12E1 / CV345 $2.50 unknown 70% --- Used Fair cat:401-335

Notes: ST=ST Style, GT=GT Style, GL=Globe/Balloon Style, MT=Metal Style,
MN=Miniature(7/9pin) Style, SM=Subminature Style
EN=Engraved Base, CB=Cracked Base, LB=Loose Base, LC=Loose Cap, MC=Missing Cap, 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
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).
DMC = Mutual conductance measured on B&K 747 tube tester.
(DMC<55:weak, DMC55<>65:fair, DMC>65:good, DMC>40=diode good).


How to Order:

Purchasing our bargain bin 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


We cannot guarantee our Bargain Bin tubes. All sales of our Bargain Bin tubes are final.

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.


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Bargain Bin Tubes

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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com