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 6AK10 $0.50 Sylvania 80% / 85% / 80% 70 / 70 / 70dmc Used fair Compactron - (cat:1h) short plates
1 6GB5 $0.50 unknown (Sylvania?) 100% 100%dmc Used leaky Compactron (cat:L1h)
1 6HB5 $1.00 RCA 110% 70dmc Used fair Compactron - (cat:1h)
1 6HF5 $0.50 GE 60% 60%dmc Used fair Compactron (cat:L1h)
1 6HJ5 $1.00 Raytheon 120% 120%dmc Used Leaky (3M) Compactron (cat:L1h)
1 6JE6A $1.00 Unknown 100% 100%dmc Used Leaky Compactron (cat:L1h)
1 6LQ6 $1.00 Unknown 90% 100%dmc Used Leaky Compactron (cat:L1h)
1 6LQ6 $1.00 Unknown 120% 120%dmc Used Leaky Compactron (cat:L1h)
1 6JH5 $1.00 Zenith 100% 100%dmc Used Leaky Compactron (cat:L1h)
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 Raytheon 120% 100dmc used leaky (500K) (L) (cat:L1h) Compactron
1 6JU6 $2.00 GE 130% --- used leaky (500K) (ob) (cat:L1h) Compactron
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 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 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)
1 6LX6 $12.50 unknown 90% 110%dmc Used Good Compactron - loose cap (cat:L-1h)
1 6LX6 $12.50 Motorola 90% 80%dmc Used Good Compactron - loose cap (cat:L-1h)
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 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 $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)
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-1h)
1 24LQ6 / 24JE6 $1.00 RCA 130% 120%dmc Used Leaky Compactron (cat:L-1h)
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-1h)
1 26LX6 $1.00 unknown 90% 100%dmc Used Compactron - loose cap (cat:L-1h)
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)
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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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com