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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 Audio Tubes
Qty
Avail		Tube
Type 		Price
Each 		Tube
Brand 		Emission
Strength 		Mutual
Conduct
Desc
Notes
1 6SL7GT / 5691 $70.00 Westinghouse 100% / 100% 1350:1350 / 1250Gm used (OB) redish orange lettering - redish brown base - gray rectangular ribbed plates - dual D top getters - mica getter shield - five metal mount posts - datecode:70-30
1 6SL7GT / 5691 $70.00 Westinghouse 100% / 100% 1200:1200 / 1250Gm used (wb) redish orange letterng - redish brown base - gray rectangular ribbed plates - dual D top getters - mica getter shield - five metal mount posts - datecode:70-22
1 6SL7GT / 5691 $50.00 Westinghouse 90% / 90% 1200:1200 / 1250Gm used (wb) redish orange lettering - redish brown base - gray rectangular ribbed plates - dual D top getters - mica getter shield - five metal mount posts - datecode:68-35
1 6SL7GT $20.00 GE 110% / 120% 1300:1450 / 1250Gm NOS (OB) side getter - round silver plates - white lettering
1 6SL7GT $20.00 GE 110% / 110% 1350:1350 / 1250Gm NOS (OB) side getter - round silver plates - white lettering
1 6SL7GT $20.00 GE 110% / 100% 1350:1250 / 1250Gm NOS (OB) side getter - round silver plates - white lettering
1 6SL7GT $20.00 GE 110% / 110% 1300:1300 / 1250Gm NOS (OB) bottom getter - round gray plates - white lettering
1 6SL7GT $20.00 GE 130% / 130% 1600:1650 / 1250Gm NOS (OB) side getter - round silver plates - white lettering
1 6SL7GT $20.00 GE 140% / 130% 1750:1600 / 1250Gm NOS (OB) side getter - short round silver plates - green lettering
1 6SL7GT $20.00 Motorola 100% / 100% 1250:1250 / 1250Gm NOS (OB) bottom getter - round black plates - gray coat
1 6SL7GT $20.00 Ken-Rad 100% / 100% 1250:1250 / 1250Gm NOS (OB) bottom getter - round silver plates
1 6SL7GT $20.00 RCA 115% / 120% 1400:1500 / 1250Gm NOS (wb) bottom getter - round black plates - silver lettering
1 6SL7GT $20.00 RCA 125% / 130% 1650:1700 / 1250Gm NOS (OB) side getter - round silver plates - red lettering - button base
1 6SL7GT $20.00 RCA 135% / 140% 1700:1750 / 1250Gm NOS (OB) side getter - round silver plates - red lettering - button base
1 6SL7GT $20.00 RCA 120% / 110% 1300:1250 / 1250Gm NOS (wb) side getter - round black plates - button base
1 6SL7GT $20.00 RCA 120% / 120% 1550:1500 / 1250Gm NOS (OB) bottom getter - gray coat - silver lettering - torn box flap
1 6SL7GT $20.00 Sylvania 100% / 105% 1400:1500 / 1250Gm NOS (OB) top getter - round black plates - yellow lettering
1 6SL7GT $20.00 Sylvania untested sealed in box NOS (OB) sealed in box
1 6SL7GT $20.00 Raytheon 110% / 110% 1300:1300 / 1250Gm NOS (OB) bottom getter - round gray plates
1 6SL7GT $20.00 Arcturus 110% / 120% 1250:1300 / 1250Gm NOS (OB) bottom getter - round black plates
1 6SL7GT $15.00 Tung-Sol 110% / 110% 1300:1400 / 1000Gm used (wb) bottom getter - round black plates
1 12SL7GT / VT-289 $25.00 RCA 120% / 130% 1450:1300 / 1250Gm NOS (OB) sealed in box - JAN (cat:au2a)
1 12SL7GT / VT-289 $25.00 RCA 120% / 120% 1400:1400 / 1250Gm NOS (OB) sealed in box - JAN (cat:au2a)
1 12SL7GT / VT-289 $25.00 RCA 110% / 110% 1350:1300 / 1250Gm NOS (OB) sealed in box - US Navy (cat:au2a)
1 12SL7GT / VT-289 $25.00 Ken-Rad 100% / 100% 1250:1250 / 1250Gm NOS (OB) sealed in box - JAN (cat:au2a)
1 12SL7GT / VT-289 $30.00 RCA 120% / 120% 1500:1550 / 1250Gm NOS (OB) JAN - round black plates - bottom getter (cat:au2a)
1 12SL7GT / VT-289 $30.00 RCA 110% / 110% 1400:1400 / 1250Gm NOS (wb) JAN - round black plates - bottom getter (cat:au2a)
1 12SL7GT / VT-289 $30.00 National Union 145% / 140% 2000:1800 / 1250Gm NOS (OB) JAN - round gray plates - bottom getter (cat:au2a)
1 12SL7GT $15.00 Sylvania untested sealed in box NOS (OB) US Navy (cat:au2a)
1 12SL7GT $12.00 National Union 120% / 110% 1600:1500 / 1250Gm NOS (OB) bottom getter - round black plates (cat:au2a)
1 12SL7GT $12.00 National Union 140% / 150% 1700:2200 / 1250Gm NOS (OB) bottom getter - round black plates (cat:au2a)
1 12SL7GT $12.00 National Union 110% / 125% 1450:1600 / 1250Gm NOS (OB) bottom getter - round black plates (cat:au2a)
1 12SL7GT $12.00 RCA 110% / 110% 1250:1250 / 1250Gm NOS (OB) bottom getter - round black plates - red lettering (cat:au2a)
1 12SL7GT $12.00 RCA 110% / 110% 1250:1250 / 1250Gm NOS (OB) bottom getter - round black plates - red lettering (cat:au2a)
1 12SL7GT $12.00 RCA 130% / 140% 1500:1550 / 1250Gm NOS (OB) bottom getter - round black plates - white lettering - damaged box (cat:au2a)
1 12SL7GT $12.00 RCA 110% / 115% 1250:1300 / 1250Gm NOS (OB) bottom getter - round gray plates - white lettering - made in England - damaged box (cat:au2a)
1 12SL7GT $12.00 RCA 125% / 120% 1400:1400 / 1250Gm NOS (OB) side getter - round silver plates - red lettering (cat:au2a)
1 12SL7GT $12.00 RCA 120% / 120% 1450:1500 / 1250Gm NOS (OB) bottom getter - round black plates - silver lettering (cat:au2a)
1 12SL7GT $12.00 RCA 130% / 140% 1500:1700 / 1250Gm NOS (OB) sealed in box (cat:au2a)
1 12SL7GT $12.00 Raytheon 120% / 120% 1400:1400 / 1250Gm NOS (OB) bottom getter - round gray plates (au2a)
1 12SL7GT $12.00 Raytheon 110% / 110% 1300:1300 / 1250Gm NOS (OB) top getter - round black plates (au2a)
1 12SL7GT $12.00 Chancelor 130% / 130% 1450:1450 / 1250Gm NOS (OB) bottom getter - round gray plates - black coat (au2a)
1 12SL7GT $12.00 Chancelor 120% / 130% 1500:1500 / 1250Gm NOS (OB) bottom getter - round gray plates - black coat (au2a)
1 12SL7GT $12.00 Chancelor 120% / 120% 1450:1450 / 1250Gm NOS (OB) bottom getter - round gray plates - black coat (au2a)
1 12SL7GT $12.00 Sylvania 110% / 110% 1250:1250 / 1250Gm NOS (OB) top getter - round black plates - yellow lettering (cat:au2a)
1 12SL7GT $12.00 Sylvania 120% / 120% 1400:1450 / 1250Gm NOS (OB) top getter - round black plates - yellow lettering (cat:au2a)
1 12SL7GT $12.00 Sylvania 115% / 115% 1400:1400 / 1250Gm NOS (OB) bottom getter - round black plates - green lettering (cat:au2a)
1 12SL7GT $12.00 Sylvania 110% / 110% 1500:1500 / 1250Gm NOS (OB) bottom getter - round black plates - green lettering (cat:au2a)
1 12SL7GT $12.00 Sylvania 110% / 110% 1300:1450 / 1250Gm NOS (OB) bottom getter - round black plates - green lettering (cat:au2a)
1 12SL7GT $12.00 Sylvania 110% / 110% 1450:1400 / 1250Gm NOS (OB) bottom getter - round gray plates - green lettering (cat:au2a)
1 12SL7GT $12.00 GE 130% / 130% 1700:1750 / 1250Gm NOS (OB) side getter - round silver plates - white lettering (au2a)
1 12SL7GT $12.00 GE 110% / 110% 1400:1400 / 1250Gm NOS (OB) side getter - round silver plates - white lettering (au2a)
1 12SL7GT $4.00 RCA 100% / 100% 1100:1100 / 1250Gm used (rb) gray coat - white lettering (cat:au2a)
1 12SL7GT $4.00 Sylvania 90% / 85% 1150:1000 / 1250Gm used (ob) bottom getter - round gray plates
1 12SL7GT $4.00 Sylvania 95% / 90% 1100:1100 / 1250Gm used (ob) chrome top - top getter - round gray plates
1 12SL7GT / VT-289 $4.00 Sylvania 90% / 95% 1150:1150 / 1250Gm used (rb) JAN - bottom getter - round black plates
1 12SL7GT $4.00 RCA 100% / 95% 1250:1200 / 1250Gm used (L) bottom getter - round black plates - black coat
1 12SL7GT $5.00 RCA 100% / 105% 1250:1350 / 1250Gm used (L) bottom getter - round black plates - cat:403-327-4
1 12SL7GT $6.00 RCA 110% / 120% 1650:1750 / 1250Gm used (L) bottom getter - round black plates - cat:403-328-4
1 12SL7GT $6.00 Sylvania 110% / 100% 1300:1250 / 1250Gm used (L) top getter - round gray plates
1 12SL7GT $6.00 RCA 120% / 100% 1450:1200 / 1250Gm used (rb) bottom getter - round black plates
1 12SL7GT $6.00 GE 105% / 105% 1300:1300 / 1250Gm used (rb) top getter - round black plates
1 12SL7GT $4.00 Sylvania 90% / 110% 1250:1350 / 1250Gm used (rb) bottom getter - round black plates - green lettering
1 12SL7GT $6.00 Sylvania 105% / 105% 1300:1300 / 1250Gm used (rb) top getter - round gray plates - green lettering
Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box, (L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
(ST)=ST Style, (GT)=GT Style, (TT)=Tall Tubular, (M7)=7pin miniature, M9=9pin miniature, (SM)=subminiature, 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; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).

How To Order:

Purchasing our audio 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

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

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