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
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| 1 | 6AK10 | $0.50 | Sylvania | 80% / 85% / 80% | 70 / 70 / 70dmc | Used fair | Compactron - (cat:1h) short plates |
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| 1 | 6GB5 | $0.50 | unknown (Sylvania?) | 100% | 100%dmc | Used leaky | Compactron (cat:L1h) |
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| 1 | 6HB5 | $1.00 | RCA | 110% | 70dmc | Used fair | Compactron - (cat:1h) |
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| 1 | 6HF5 | $0.50 | GE | 60% | 60%dmc | Used fair | Compactron (cat:L1h) |
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| 1 | 6HJ5 | $1.00 | Raytheon | 120% | 120%dmc | Used Leaky (3M) | Compactron (cat:L1h) |
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| 1 | 6JH5 | $1.00 | Zenith | 100% | 100%dmc | Used Leaky | Compactron (cat:L1h) |
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| 1 | 6JM6 | $2.00 | RCA | 110% | 95dmc | used (OB) | (cat:L1h) Compactron |
| 1 | 6JM6 | $1.00 | Zenith | 80% | 80dmc | used (rb) | (cat:L1h) Compactron |
| 1 | 6JM6 | $2.00 | Zenith | 100% | 90dmc | used (rb) | (cat:L1h) Compactron |
| 1 | 6JM6 | $0.50 | unknown | 110% | 70dmc | used (rb) | (cat:L1h) Compactron |
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| 1 | 6JN6 | $1.00 | Raytheon | 120% | 100dmc | used leaky (500K) (L) | (cat:L1h) Compactron |
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| 1 | 6JU6 | $2.00 | GE | 130% | --- | used leaky (500K) (ob) | (cat:L1h) Compactron |
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| 1 | 6KG6 / EL509 | $2.50 | unknown | 95% | 65%dmc | Used poor | Compactron - crack in base - (cat:1g) |
| 1 | 6KG6 | $9.00 | unknown | 90% | 70%dmc | Used Fair | Compactron - (cat:1g) |
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| 1 | 6KM6 | $2.50 | RCA | 120% | 100dmc | used leaky (1M) (OB) | (cat:L1h) Compactron |
| 1 | 6KM6 | $2.50 | unknown | 110% | 110dmc | Used good | Compactron - (cat:1h) loose cap |
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| 1 | 6LU8 | $1.00 | GE | 110% / 85% | 80 / 90dmc | Used fair | Compactron - (cat:L-1h) |
| 1 | 6LU8 | $0.50 | unknown | 100% / 140% | 65 / 100dmc | Used fair | Compactron - (cat:L-1h) |
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| 1 | 6LX6 | $12.50 | unknown | 90% | 110%dmc | Used Good | Compactron - loose cap (cat:L-1h) |
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| 1 | 12GE5 | $1.00 | GE | 95% | 110dmc | used (ob) | Compactron (cat:L-1h) |
| 1 | 12GE5 | $1.00 | RCA | 100% | 100dmc | used (ob) | Compactron (cat:L-1h) |
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| 1 | 12GT5 | $1.00 | RCA | 120% | 110dmc | Used leaky (3M) | Compactron - (cat:L-1h) |
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| 1 | 12HE7 | $0.50 | Sylvania | 90% diode:110% | 100dmc | Used leaky (5M) | Compactron (cat:L-1h) |
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| 1 | 15MF8 | $2.00 | Sylvania | P:95% / T:120% | P:80 / T:85dmc | Used good | Compactron - (cat::L-1h) |
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| 1 | 17GT5A | $1.00 | GE | 120% | 110dmc | Used leaky (1M) | Compactron - (cat:L-1h) |
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| 1 | 17JG6 | $1.00 | RCA | 90% | 110dmc | Used leaky (300K) | Compactron - (cat:L-1h) |
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| 1 | 17KV6A | $2.00 | RCA | 105% | 110dmc | Used leaky (5M) | Compactron - (cat:L-1h) |
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| 1 | 18GB5 | $0.50 | RCA | 110% | 110dmc | Used leaky (2M) | Compactron - (cat:L-1h) |
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| 1 | 21JS6-A / 23JS6-A | $7.50 | GE | 90% | 70dmc | Used fair | Compactron (cat:L-1h) |
| 1 | 21JS6-A / 23JS6-A | $5.00 | GE | 100% | 120dmc | Used leaky (500K) | Compactron (cat:L-1h) |
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| 1 | 22KM6 | $1.00 | unknown | 120% | 100dmc | Used leaky (5M) | Compactron - (cat:L-1h) |
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| 1 | 24LQ6 / 24JE6-C | $4.00 | Lindal | 110% | 120dmc | Used Leaky (5M) | Compactron (cat:L-1h) |
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| 1 | 31JS6C | $2.50 | Raytheon | 110% | 120dmc | used leaky (3M) (L) | (cat:C-1h) |
| 1 | 31JS6C | $2.50 | Sylvania | 80% | 70dmc | used (rb) | (cat:C-1h) |
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| 1 | 40KG6 | $4.00 | GE | 100% | 70dmc | Used fair (rb) | Compactron - cat:Lh) |
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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Discount Bargain Packs
for more savings!
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