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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
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| 1 | 6AK10 | $0.50 | Sylvania | 80%/85%/80% | 70/70/70dmc | Used fair | Compactron - (cat:1h) short plates
| | 1 | 6JF6 | $1.00 | Sylvania | 65% | 60dmc | used fair (L) | (cat:C-1h) Compactron
| | 1 | 6JF6 | $0.50 | Sylvania | 35% | 20dmc | used weak (L) | (cat:C-1h) Compactron
| | 1 | 6GB5 | $0.50 | unknown (Sylvania?) | 100% | 100%dmc | Used leaky | Compactron (cat:L1g)
| | 1 | 6GE5 | $1.00 | Tung-Sol | 115% | 60%dmc | Used fair | Compactron (cat:L1g)
| | 1 | 6GE5 | $1.00 | Zenith | 80% | 90%dmc | Used fair | Compactron (cat:L1g)
| | 1 | 6GF7A | $0.50 | RCA | 100%/70% | 95/100dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | RCA | 110%/50% | 90/70dmc | Used weak | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | RCA | 80%/100% | 80/110dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | RCA | 70%/75% | --- | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | RCA | 140%/55% | 110/60dmc | Used weak | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | RCA | 125%/80% | 100/100dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | Sylvania | 75%/75% | 60/90dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7 | $0.50 | RCA | 50%/75% | 50/80dmc | Used weak | Compactron (cat:L1h)
| | 1 | 6GF7 | $0.50 | unknown | 90%/70% | 70/90dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7 | $0.50 | unknown | 70%/90% | 50/90dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7 | $0.50 | unknown | 70%/95% | 60100dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7 | $0.50 | unknown(usa) | 90%/75% | 70/80dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | unknown | 115%/45% | 70/100dmc | Used weak | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | unknown | 60%/100% | 90/60dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | unknown | 75%/80% | 70/90dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | unknown | 115%/60% | 100/80dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GF7A | $0.50 | unknown | 100%/66% | 90/85dmc | Used fair | Compactron (cat:L1h)
| | 1 | 6GJ5 | $1.00 | GE | 90% | 70%dmc | Used fair | Compactron (cat:L1g)
| | 1 | 6GM5 | $1.00 | RCA | 80% | 80dmc | Used fair | Compactron (cat:L1a)
| | 1 | 6HB5 | $1.00 | RCA | 110% | 70dmc | Used fair | Compactron - (cat:1h)
| | 1 | 6HE5 | $1.00 | Zenith | 120% | 110dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6HE5 | $1.00 | Zenith | 100% | 90dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6HE5 | $1.00 | Zenith | 120% | 100dmc | Used Leaky (600K) | Compactron (cat:L1a)
| | 1 | 6HE5 | $1.00 | unknown | 100% | 100dmc | Used Leaky (2M) | Compactron (cat:L1a)
| | 1 | 6HF5 | $4.00 | GE | 100% | 60%dmc | Used Fair (ob) | Compactron (cat:L1a)
| | 1 | 6HF5 | $3.00 | Sylvania | 60% | 60%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6HF5 | $4.00 | RCA | 80% | 70%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6HF5 | $3.00 | unknown | 70% | 70%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6HF5 | $3.00 | unknown | 70% | 70%dmc | Used Fair | Compactron (cat:1g)
| | 1 | 6HF5 | $3.00 | unknown | 60% | 40%dmc | Used Weak | Compactron (cat:1g)
| | 1 | 6HJ5 | $1.00 | Raytheon | 120% | 120%dmc | Used Leaky (3M) | Compactron (cat:L1h)
| | 1 | 6HS5 | $0.50 | Zenith | 40% | 20dmc | used weak (L) | (cat:C-1h)
| | 1 | 6HV5 | $2.50 | Sylvania | 100% | 50dmc | used fair (L) | (cat:C-1g)
| | 1 | 6HV5 | $0.50 | Sylvania | 50% | 40dmc | used weak (L) | (cat:C-1g)
| | 1 | 6JA5 | $1.00 | Zenith | 95% | 50dmc | used fair (rb) | (cat:C-1h)
| | 1 | 6JB5/6JC5/6HE5 | $2.00 | unknown | 110% | 70dmc | used (L) | (cat:L1h) Compactron
| | 1 | 6JC6 | $1.00 | Sylvania | 75% | 80%dmc | Used Fair | Compactron - cat:402-453-2 - L1a)
| | 1 | 6JE6A | $1.00 | Unknown | 100% | 100%dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6JE6C/6LQ6 | $1.00 | Magnavox | 70% | 80%dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6LQ6 | $1.00 | Unknown | 90% | 100%dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6LQ6 | $1.00 | Unknown | 120% | 120%dmc | Used Leaky | Compactron (cat:L1a)
| | 1 | 6JH5 | $1.00 | Zenith | 100% | 100%dmc | Used Leaky | Compactron (cat:L1a)
| | 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
| | 1 | 6JN6 | $1.00 | unknown | 80% | 85dmc | used (rb) | (cat:L1h) Compactron
| | 1 | 6JN6 | $1.00 | Raytheon | 120% | 100dmc | used leaky (500K) (L) | (cat:L1h) Compactron
| | 1 | 6JS6C | $3.00 | Sylvania | 70% | 25%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6JT6A | $4.00 | RCA | 80% | --- | Used fair | Compactron (cat:L1a)
| | 1 | 6JU6 | $2.00 | GE | 130% | --- | used leaky (500K) (ob) | (cat:L1h) Compactron
| | 1 | 6K11 | $0.50 | unknown | 90%/65%/70% | 70/60/75dmc | Used fair | Compactron - (cat:LG2)
| | 1 | 6KD6 | $3.00 | Unknown | 75% | 100dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6KD6 | $2.50 | Sterling | 70% | 80dmc | Used Fair | Compactron - loose cap (cat:L1a)
| | 1 | 6KD6 | $2.50 | Unknown | 60% | 100dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6KG6 | $7.50 | unknown | 75% | 50%dmc | Used Fair | Compactron - green band - (cat:1g)
| | 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)
| | 1 | 6KG6/EL519 | $8.00 | Lindal | 80% | 60%dmc | Used Fair | Compactron - (cat:1g)
| | 1 | 6KG6/EL509 | $2.50 | Selectron | 70% | 30%dmc | Used weak | Compactron - (cat:1g)
| | 1 | 6KM6 | $1.00 | RCA | 40% | 30dmc | Used weak | Compactron - (cat:1g)
| | 1 | 6KM6 | $1.00 | Sylvania | 100% | --- | Used | Compactron - (cat:1g) irrratic
| | 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
| | 1 | 6KN6 | $1.50 | Sylvania | 75% | 50%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6KN6 | $4.00 | Sylvania | 100% | 60%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6KN6 | $4.00 | Sylvania | 70% | 80%dmc | Used Fair (rb) | Compactron (cat:1g)
| | 1 | 6KN6 | $4.00 | Sylvania | 70% | 80%dmc | Used Fair (ob) | Compactron (cat:1g)
| | 1 | 6LB6 | $4.00 | GE | 90% | 50%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6LB6 | $1.00 | Sylvania | 70% | 25%dmc | Used Weak | Compactron (cat:L1a)
| | 1 | 6LB6 | $2.50 | Unknown | 45% | 45%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6LB6 | $0.50 | Sylvania | 10% | 10%dmc | Used Weak | Compactron (cat:L1a)
| | 1 | 6LR6 | $10.00 | Sylvania | 75% | 140%dmc | Used fair | Compactron (cat:L1a)
| | 1 | 6LR6 | $5.00 | Sylvania | 60% | 100%dmc | Used Fair | Compactron (cat:L1a)
| | 1 | 6LR6 | $1.00 | RCA | 40% | 40%dmc | Used Weak | Compactron (cat:L1a)
| | 1 | 6LR6 | $1.00 | RCA | 40% | 120%dmc | Used Weak | Compactron (cat:L1a)
| | 1 | 6LR6 | $1.00 | Sylvania | 90% | 30%dmc | Used Weak | Compactron (cat:L1a)
| | 1 | 6LU8 | $1.00 | GE | 110%/85% | 80/90dmc | Used fair | Compactron - (cat:L-1h)
| | 1 | 6LU8 | $1.00 | Realistic | 120%/60% | 90/70dmc | Used fair | Compactron - (cat:L-1h)
| | 1 | 6LU8 | $0.50 | unknown | 100%/140% | 65/100dmc | Used fair | Compactron - (cat:L-1h)
| | 1 | 6LU8 | $0.50 | Sylvania | 45%/90% | 60/80dmc | Used weak | Compactron - (cat:L-1h)
| | 1 | 6LX6 | $12.50 | unknown | 90% | 110%dmc | Used Good | Compactron - loose cap (cat:L-1a)
| | 1 | 6LX6 | $12.50 | Motorola | 90% | 80%dmc | Used Good | Compactron - loose cap (cat:L-1a)
| | 1 | 6LX6 | $1.00 | Motorola | 30% | 10%dmc | Used weak | Compactron - loose cap (cat:1g)
| | 1 | 6MH6 | $5.00 | unknown | 70% | 50%dmc | Used Fair | Compactron - loose cap (cat:L-1a)
| | 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)
| | 1 | 12GT5 | $1.00 | RCA | 120% | 110dmc | Used leaky (3M) | Compactron - (cat:L-1h)
| | 1 | 12HE7 | $0.50 | Sylvania | 90% diode:110% | 100dmc | Used leaky (5M) | Compactron (cat:L-1h)
| | 1 | 12JF5 | $1.00 | GE | 75% | 40dmc | used (rb) | Compactron (cat:L-1h)
| | 1 | 15MF8 | $2.00 | Sylvania | P:95%/T:120% | P:80/T:85dmc | Used good | Compactron - (cat::L-1h)
| | 1 | 17GT5A | $1.00 | GE | 120% | 110dmc | Used leaky (1M) | Compactron - (cat:L-1h)
| | 1 | 17JG6 | $1.00 | RCA | 90% | 110dmc | Used leaky (300K) | Compactron - (cat:L-1h)
| | 1 | 17KV6A | $2.00 | RCA | 105% | 110dmc | Used leaky (5M) | Compactron - (cat:L-1h)
| | 1 | 18GB5 | $0.50 | RCA | 110% | 110dmc | Used leaky (2M) | Compactron - (cat:L-1h)
| | 1 | 21JS6-A/23JS6-A | $5.00 | GE | 100% | 120dmc | Used leaky (500K) | Compactron (cat:L-1a)
| | 1 | 21JS6-A/23JS6-A | $7.50 | GE | 90% | 70dmc | Used fair | Compactron (cat:L-1h)
| | 1 | 21LG6 | $1.00 | unknown | 50% | 80dmc | Used weak | Compactron - (cat:L-1h)
| | 1 | 21LG6 | $1.00 | unknown | 40% | 70dmc | Used weak | Compactron - (cat:L-1h)
| | 1 | 22KM6 | $1.00 | unknown | 120% | 100dmc | Used leaky (5M) | Compactron - (cat:L-1h)
| | 1 | 24LQ6/24JE6-C | $4.00 | Lindal | 110% | 120dmc | Used Leaky (5M) | Compactron (cat:L-1g)
| | 1 | 24LQ6/24JE6 | $1.00 | RCA | 130% | 120%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 24JE6 | $1.00 | RCA | 120% | 110%dmc | Used good | Compactron - loose cap (cat:L-1a)
| | 1 | 24LQ6 | $1.00 | unknown | 75% | 80dmc | Used fair | Compactron (cat:L-1g)
| | 1 | 24LQ6/24JE6 | $1.00 | unknown | 120% | 105%dmc | Used Leaky (2M) | Compactron (cat:L-1h)
| | 1 | 26LX6 | $1.00 | GE | 90% | 90%dmc | Used | Compactron - loose cap (cat:L-1a)
| | 1 | 26LX6 | $1.00 | unknown | 90% | 100%dmc | Used | Compactron - loose cap (cat:L-1a)
| | 1 | 30JZ6 | $0.50 | Sylvania | 20% | 20%dmc | Used weak (ob) | Compactron - cat:L-1g)
| | 1 | 30JZ6 | $0.50 | Westinghouse | 15% | 10%dmc | Used weak (ob) | Compactron - cat:L-1g)
| | 1 | 30JZ6 | $0.50 | RCA | 80% | 40%dmc | Used weak (ob) | Compactron - cat:L-1g)
| | 1 | 30KD6 | $1.00 | Sears | 100% | 110%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 30KD6 | $1.00 | Lindal | 120% | 110%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 30KD6 | $1.00 | Sylvania | 130% | 110%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 30KD6 | $1.00 | Sylvania | 120% | 100%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | RCA | 100% | 100%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | RCA | 90% | 90%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Zenith | 130% | 60%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | GE | 110% | 100%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Sears | 60% | 85%dmc | Used Fair | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Unknown | 75% | 80%dmc | Used Fair | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Unknown | 70% | 80%dmc | Used Fair | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Unknown | 70% | 60%dmc | Used Fair | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Unknown | 90% | 85%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Zenith | 90% | 90%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 36KD6 | $1.00 | Zenith | 100% | 95%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 31JS6C | $2.50 | RCA | 70% | 40dmc | used (L) | (cat:C-1a)
| | 1 | 31JS6C | $2.50 | Raytheon | 110% | 120dmc | used leaky (3M) (L) | (cat:C-1a)
| | 1 | 31JS6C | $2.50 | Sylvania | 80% | 70dmc | used (rb) | (cat:C-1h)
| | 1 | 35LR6 | $5.00 | RCA | 105% | 90dmc | used leaky (1M) (L) | (cat:C-1g)
| | 1 | 35LR6 | $0.50 | Sylvania | 70% | 30dmc | used weak (rb) | (cat:C-1g)
| | 1 | 40KD6 | $1.00 | GE | 100% | 100%dmc | Used Leaky | Compactron (cat:L-1a)
| | 1 | 40KD6 | $1.00 | unknown | 75% | 100%dmc | Used fair | Compactron (cat:L-1a)
| | 1 | 40KD6 | $0.50 | unknown | 30% | 20%dmc | Used weak | Compactron (cat:1g)
| | 1 | 40KG6 | $4.00 | RCA | 80% | 45dmc | Used weak | Compactron - cat:1g)
| | 1 | 40KG6 | $4.00 | GE | 100% | 70dmc | Used fair (rb) | Compactron - cat:Lg2)
| | 1 | 40KG6/PL509 | $1.50 | Panasonic | 30% | 20dmc | Used weak | Compactron - cat:1g)
| | 1 | 7984 | $2.50 | GE | 100% | 60dmc | Used fair (L) | Compactron - (cat:L-1h)
| | 1 | 7984 | $2.50 | GE | 70% | 55dmc | Used weak (L) | Compactron - (cat:L-1h)
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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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