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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
Quantity
Available | Tube
Type | Price
Each | Tube
Brand | Emission
Strength | Mutual
Conductance |
Description |
Notes
|
| 1 | 307 | $20.00 | Western Electric | 30% | 500/2000Gm | Used weak | (ST) (H) halo getter - ribbed black plate - no coat - engraved base - bayonet pin
| | 1 | 307-A/VT-225 | $10.00 | Sylvania | 110% | 2400/2000Gm | Used leaky (500K) | (ST) (H) dual getter - ribbed black plate
| | 1 | 802 | $1.00 | RCA | 60% | 2300/2100Gm | Used Leaky | (ST) engraved base (cat:402-163)
| | 1 | 802 | $1.00 | RCA | 60% | 1350/2100Gm | Used Leaky (300K) | (ST) engraved base
| | 1 | 802 | $1.50 | RCA | 100% | 2100/2100Gm | Used Leaky | (2M) (ST) engraved base
| | 1 | 802 | $1.00 | RCA/Deforest | 2% | 350/2100Gm | Used weak | (ST) engraved base
| | 1 | 807/VT-100-A | $2.50 | RCA | 130% | 4400/3800Gm | Used leaky (2M) | (ST) ceramic spacers
| | 1 | 807/VT-100-A | $2.50 | Hytron | 110% | 5400/3800Gm | Used leaky (5M) | (ST) ceramic spacers
| | 1 | 807/VT-100-A | $1.50 | Sylvania | 110% | 5200/3800Gm | Used leaky (500K) | (ST) JAN - ceramic spacers
| | 1 | 807/VT-100-A | $1.50 | Sylvania | 115% | 5800/3800Gm | Used leaky (100K) | (ST) JAN - ceramic spacers
| | 1 | 807/VT-100-A | $2.50 | Sylvania | 120% | 3900/3800Gm | Used leaky (2M) | (ST) JAN - loose ceramic inside - ceramic spacers
| | 1 | 807/VT-100-A | $2.00 | National Union | 70% | 3000/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807/VT-100-A | $1.00 | National Union | 60% | 2500/3800Gm | Used weak | (ST) JAN - ceramic spacers
| | 1 | 807/VT-100-A | $0.50 | National Union | 140% | 500/3800Gm | Used weak | (ST) JAN - ceramic spacers
| | 1 | GL-807 | $2.50 | GE | 130% | 4600/3800Gm | Used leaky (7M) | (ST) (cat:401-538-4) ceramic spacers - white particles inside
| | 1 | GL-807 | $2.50 | GE | 110% | 6000/3800Gm | Used leaky (200K) | (ST) ceramic spacers
| | 1 | GL-807 | $2.00 | GE | 120% | 6000/3800Gm | Used leaky (500K) | (ST) ceramic spacers
| | 1 | GL-807 | $2.50 | GE | 120% | 6000/3800Gm | Used leaky (5M) | (ST) loose base
| | 1 | GL-807 | $1.50 | GE | 100% | 4800/3800Gm | Used leaky (100K) | (ST)- ceramic spacers
| | 1 | GL-807 | $2.50 | GE | 100% | 3800/3800Gm | Used leaky (1M) | (ST) ceramic spacers
| | 1 | GL-807 | $1.50 | GE | 90% | 5200/3800Gm | Used leaky (4M) | (ST) ceramic spacers
| | 1 | 807 | $2.50 | GE | 120% | 6000/3800Gm | Used leaky (2M) | (ST) JAN - ceramic spacers
| | 1 | 807 | $1.00 | GE | 80% | 3800/3800Gm | Used leaky (5M) | (ST) ceramic spacers
| | 1 | 807 | $2.00 | RCA | 120% | 6000/3800Gm | Used leaky (100K) | (ST) JAN - mica supports
| | 1 | 807 | $5.00 | RCA | 100% | 3400/3800Gm | Used fair | (ST) mica supports
| | 1 | 807 | $2.50 | RCA | 120% | 4300/3800Gm | Used leaky (5M) | (ST) mica supports
| | 1 | 807 | $1.50 | RCA | 80% | 4500/3800Gm | Used leaky (500K) | (ST) mica supports
| | 1 | 807 | $1.50 | RCA | 70% | 3000/3800Gm | Used fair | (ST) mica supports
| | 1 | 807 | $2.50 | RCA | 120% | 4400/3800Gm | Used leaky (5M) | (ST) ceramic spacers
| | 1 | 807 | $2.50 | RCA | 120% | 6000/3800Gm | Used leaky (4M) | (ST) ceramic spacers
| | 1 | 807 | $2.00 | RCA | 120% | 6000/3800Gm | Used leaky (600K) | (ST) ceramic spacers
| | 1 | 807 | $2.00 | RCA | 100% | 5200/3800Gm | Used leaky (5M) | (ST) ceramic spacers
| | 1 | 807 | $1.50 | RCA | 90% | 4600/3800Gm | Used leaky (500K) | (ST) ceramic spacers
| | 1 | 807 | $1.50 | RCA | 80% | 3000/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807 | $1.50 | RCA | 70% | 2800/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807 | $0.50 | RCA | 25% | 1000/3800Gm | Used weak | (ST) ceramic spacers
| | 1 | 807 | $1.00 | CEI | 100% | 5100/3800Gm | Used leaky (100K) | (ST) mica supports
| | 1 | 807 | $0.50 | Sylvania | 100% | 4800/3800Gm | Used leaky (25K) | (ST) JAN - ceramic spacers
| | 1 | 807 | $2.00 | National Union | 80% | 3500/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807 | $2.00 | National Union | 80% | 3500/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807 | $2.00 | National Union | 80% | 3300/3800Gm | Used fair | (ST) ceramic spacers
| | 1 | 807 | $0.50 | National Union | 30% | 600/3800Gm | Used weak | (ST) (cat:402-331) ceramic spacers
| | 1 | 5933/807 | $1.50 | Sylvania | 110% | 5200/3800Gm | Used leaky (5M) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 115% | 5800/3800Gm | Used leaky (1M) | (GT) cracked base
| | 1 | 5933/807 | $1.50 | Sylvania | 100% | 5600/3800Gm | Used leaky (200K) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 110% | 5100/3800Gm | Used leaky (1M) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 115% | 5800/3800Gm | Used leaky (1M) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 100% | 5000/3800Gm | Used leaky (5M) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 110% | 5100/3800Gm | Used leaky (50K) | (GT)
| | 1 | 5933/807 | $1.50 | unknown | 100% | 4500/3800Gm | Used leaky (1M) | (GT)
| | 1 | 5933/807 | $1.50 | unknown | 100% | 4500/3800Gm | Used leaky (1M) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 110% | 5300/3800Gm | Used leaky (600K) | (GT)
| | 1 | 5933/807 | $1.50 | Sylvania | 110% | 5200/3800Gm | Used leaky (2M) | (GT)
| | 1 | 5933/807W | $1.50 | Sylvania | 100% | --- | Used leaky (200K) | (GT)
| | 1 | 5933/807W | $1.50 | Sylvania | 110% | 4600/3800Gm | Used leaky (2M) | (GT)
| | 1 | 814 | $1.00 | RCA | 70% | --- | Used | 1/2 heater open - brown base (cat:401-362) Display tube
| | 1 | 814 | $1.00 | GE | --- | --- | Used gassy | brown base (cat:401-336) Display tube
| | 1 | 814 | $1.00 | GE | 10% | --- | Used weak | JAN brown base (cat:401-345) Display tube
| | 1 | 828 | $1.00 | RCA | 30% | --- | Used weak | brown base
| | 1 | 828 | $1.00 | GE | 25% | --- | Used weak | brown base
| | 1 | 828 | $1.00 | RCA | 20% | --- | Used weak | brown base (cat:401-352)
| | 1 | 837 | $2.50 | Westinghouse | 130% | 3000/4000Gm | Used fair | (ST) bayonet pin - brwon base
| | 1 | 837 | $2.50 | US Navy | 110% | 500/4000Gm | Used weak | (ST) bayonet pin - brown base
| | 1 | 1616 | $1.00 | RCA | 5% | --- | Used weak | US Navy - bayonet pin - graphite plate
| | 1 | 1625 | $2.00 | RCA | 130% | 4500/3800Gm | Used good | (ST) US Navy - loose cap - bayonet pin
| | 1 | 1625/VT-136 | $1.50 | RCA | 130% | --- | Used leaky (2M) | brown base - US Army - bayonet pin
| | 1 | 1625/VT-136 | $1.00 | RCA | 130% | --- | Used leaky (200K) | brown base - US Army - bayonet pin
| | 1 | 1625/VT-136 | $1.50 | Sylvania | 120% | 4500/3200Gm | Used leaky (2M) | brown base - JAN
| | 1 | 1625/VT-136 | $1.50 | Sylvania | 110% | 3600/3200Gm | Used leaky (2M) | brown base - JAN
| | 1 | 1625/VT-136 | $1.50 | Sylvania | 130% | 4400/3200Gm | Used leaky (2M) | brown base - JAN
| | 1 | 1625 | $1.50 | Ken-Rad | 130% | 4600/3200Gm | Used leaky | (ST) bayonet pin
| | 1 | 1625 | $1.00 | RCA | 120% | 4200/3200Gm | Used leaky | (ST) US Navy - bayonet pin
| | 1 | 1625 | $1.50 | RCA | 140% | 2100/3200Gm | Used leaky (2M) | (ST) US Navy - bayonet pin cat:403-84
| | 1 | 1625 | $1.50 | RCA | 130% | 4400/3200Gm | Used leaky (5M) | (ST) US Navy - bayonet pin
| | 1 | 1625 | $1.25 | RCA | 120% | 4300/3200Gm | Used leaky (1M) | (ST) US Navy - bayonet pin
| | 1 | 1625 | $1.00 | RCA | 120% | 4200/3200Gm | Used leaky (500K) | (ST) US Navy - bayonet pin
| | 1 | 1625/VT-136 | $1.50 | RCA | 120% | --- | Used leaky (5M) | (ST) US Army - bayonet pin
| | 1 | 1625/VT-136 | $0.50 | National Union | 30% | 500/3200Gm | Used weak | (ST) JAN - bayonet pin cat:401-536
| | 1 | 1625 | $1.00 | unknown | 120% | 4200/3200Gm | Used leaky (1M) | (ST)
| | 1 | 1625/VT-136 | $0.75 | Tung-Sol | 50% | 1650/3200Gm | Used weak | (ST)
| | 1 | 1625/VT-136 | $1.50 | Sylvania | 120% | 4400/3200Gm | Used leaky (3M) | (ST) JAN - loose ceramic inside
| | 1 | 1625/VT-136 | $0.25 | National Union | 10% | --- | Used weak | (ST)
| | 1 | 1625/VT-136 | $1.00 | RCA | 100% | --- | Used leaky | brown base - US Army - bayonet pin
| | 1 | 8020 | $0.50 | GE | no output | heater ok | Used | US Navy - bayonet pin - display tube
|
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).
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.
Contact MDB Ventures sales@mdbventures.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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