MDB Ventures Radio Tubes

Save on NOS and Used Radio Tubes!

MDB Ventures Home

Don't forget to visit our Discount Bargain Packs and Bargain Bin for more savings!

Be sure to see our Audio tube listings and "G" Style Radio Vacuum Tube List for more audio and rectifier tubes.

Type: 6R7 , VT-88 , 6S8 , 12S8 , 6SD7

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, subminature, metal, power, transmitter tubes and many more.

If you need a tube you don't see here, just send us an email and we will let you know what we have and the prices. We have both NOS and used tubes available for most of the tube numbers.
MDB Ventures Radio Tubes
Quantity
Available 		Tube
Type 		Price
Each 		Tube
Brand 		Emission
Strength 		Mutual
Conductance
Description
Notes
1 6R7-GT/VT-88B $5.00 Ken-Rad 110% diodes: 110%/110% 2100/1900Gm NOS (OB) black base - JAN
1 6R7-GT/VT-88B $2.50 Ken-Rad 90% diodes: 110%/110% 1700/1900Gm used (rb) black base - JAN
1 6R7-GT $1.50 National Union 110% diodes: 110%/80% 1500/1900Gm used (OB) black base
1 6R7-GT $2.50 GM 110% diodes: 100%/100% 1950/1900Gm used (rb) metal base band
1 6R7-GT $2.50 Sylvania 120% diodes: 110%/110% 1900/1900Gm used (wb) metal base band - green lettering
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2000/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN - sealed in box
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2000/1900Gm NOS (OB) metal - JAN - sealed in box
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN - sealed in box
1 6R7/VT-88 $4.00 Ken-Rad 130% diodes: 110%/110% 2300/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 130% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 120% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - JAN - sealed in box
1 6R7/VT-88 $4.00 Ken-Rad 130% diodes: 110%/110% 2300/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 130% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - JAN - sealed in box
1 6R7/VT-88 $4.00 Ken-Rad 130% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 Ken-Rad 140% diodes: 110%/110% 2300/1900Gm NOS (OB) metal - US Army
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 RCA 130% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2150/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2000/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN
1 6R7/VT-88 $4.00 RCA 110% diodes: 110%/110% 1950/1900Gm NOS (OB) metal - US Army
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - US Army
1 6R7/VT-88 $4.00 RCA 120% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - US Army
1 6R7/VT-88 $2.00 RCA 110% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - JAN - minor rust on tube
1 6R7 $4.00 GE 110% diodes: 110%/110% 1950/1900Gm NOS (OB) metal - white lettering
1 6R7 $4.00 GE 120% diodes: 110%/110% 2000/1900Gm NOS (OB) metal - white lettering - damaged box
1 6R7 $4.00 Raytheon 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal
1 6R7 $4.00 Sylvania 120% diodes: 110%/110% 2100/1900Gm NOS (OB) metal - yellow lettering
1 6R7 $4.00 Sylvania 130% diodes: 110%/110% 2200/1900Gm NOS (OB) metal - yellow lettering
1 6R7 $4.00 Sylvania 120% diodes: 110%/110% 2000/1900Gm NOS (OB) metal - green lettering
1 6R7/VT-88 $2.00 Ken-Rad 130% diodes: 100%/100% 2300/1900Gm used (rb) metal
1 6R7/VT-88 $2.00 Ken-Rad 110% diodes: 110%/110% 1750/1900Gm used (rb) metal - JAN
1 6R7/VT-88 $2.00 Ken-Rad 110% diodes: 100%/110% 1950/1900Gm used (rb) metal - JAN
1 6R7/VT-88 $2.00 Ken-Rad 110% diodes: 100%/100% 2100/1900Gm used (rb) metal - JAN2
1 6R7/VT-88 $2.00 RCA 120% diodes: 110%/110% 2000/1900Gm used (rb) metal - JAN - minor rust on tube
1 6R7/VT-88 $2.00 RCA 130% diodes: 110%/110% 2100/1900Gm used (rb) metal - JAN
1 6R7/VT-88 $2.00 RCA 130% diodes: 110%/110% 2200/1900Gm used (rb) metal - US Army
1 6R7/VT-88 $2.00 RCA 110% diodes: 100%/100% 1950/1900Gm used (rb) metal - US Army
1 6R7/VT-88 $2.00 RCA 110% diodes: 100%/100% 1900/1900Gm used (rb) metal - US Army
1 6R7/VT-88 $2.00 RCA 120% diodes: 100%/100% 2000/1900Gm used (rb) metal - US Army
1 6R7 $2.00 RCA 110% diodes: 110%/110% 2000/1900Gm used (rb) metal
1 6R7 $2.00 RCA Victor 120% diodes: 110%/110% 1900/1900Gm used (rb) metal
1 6R7 $2.00 Ken-Rad 120% diodes: 110%/110% 2000/1900Gm used (rb) metal
1 6R7 $2.00 Raytheon 110% diodes: 100%/110% 1950/1900Gm used (rb) metal - minor rust on tube
1 6R7 $2.00 GE 110% diodes: 110%/100% 1950/1900Gm used (L) metal - white lettering
1 6R7 $2.00 Marconi 120% diodes: 110%/110% 2100/1900Gm used (rb) metal
1 6R7 $2.00 Ken-Rad 110% diodes: 100%/100% 2000/1900Gm used (rb) metal
1 6R7 $1.50 RCA 110% diodes: 100%/90% 1950/1900Gm used (rb) metal - silver lettering
1 6R7 $1.00 Sylvania 100% diodes: 110%/110% 1700/1900Gm used (rb) metal - green lettering
1 6R7/VT-88 $1.00 Cunningham 120% diodes: 110%/110% 1750/1900Gm used (ob) metal
1 6R7/VT-88 $1.00 Ken-Rad 110% diodes: 100%/90% 2000/1900Gm used (rb) metal - JAN
1 6R7/VT-88 $0.50 RCA 90% diodes: 100%/110% 1500/1900Gm used (rb) metal - JAN
1 6S8-GT $3.00 Raytheon 110% diodes: 110%/110%/110% 950/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 120% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 120% diodes: 110%/110%/110% 1050/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 130% diodes: 110%/110%/110% 1100/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 110% diodes: 120%/120%/120% 1000/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 120% diodes: 110%/110%/110% 950/900Gm NOS (OB) ---
1 6S8-GT $3.00 Raytheon 120% diodes: 110%/120%/120% 1050/900Gm NOS (OB) ---
1 6S8-GT $3.00 RCA Victor 120% diodes: 110%/110%/120% 950/900Gm NOS (OB) ---
1 6S8-GT $3.00 RCA Victor 130% diodes: 110%/110%/110% 1050/900Gm NOS (OB) ---
1 6S8-GT $3.00 RCA 110% diodes: 110%/110%/110% 950/900Gm NOS (OB) silver lettering
1 6S8-GT $3.00 RCA 120% diodes: 120%/120%/120% 1000/900Gm NOS (OB) silver lettering
1 6S8-GT $3.00 RCA 110% diodes: 110%/120%/120% 950/900Gm NOS (OB) silver lettering
1 6S8-GT $3.00 RCA 120% diodes: 110%/120%/120% 950/900Gm NOS (OB) red lettering
1 6S8-GT $3.00 Hytron 110% diodes: 110%/110%/110% 950/900Gm NOS (OB) torn box flap
1 6S8-GT $3.00 Sylvania 110% diodes: 110%/110%/110% 1000/900Gm NOS (OB) green lettering
1 6S8-GT $3.00 Sylvania 140% diodes: 110%/110%/110% 1000/900Gm NOS (OB) green lettering
1 6S8-GT $3.00 Tung-Sol 130% diodes: 110%/120%/120% 1000/900Gm NOS (OB) ---
1 6S8-GT $3.00 Tung-Sol 120% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 6S8-GT $3.00 GE 110% diodes: 110%/110%/110% 950/900Gm NOS (OB) white lettering
1 6S8-GT $3.00 GE 120% diodes: 110%/120%/120% 950/900Gm NOS (OB) white lettering - damaged box
1 6S8-GT $3.00 Philco 120% diodes: 110%/110%/110% 950/900Gm NOS (OB) ---
1 6S8-GT $3.00 Philco 120% diodes: 110%/110%/110% 1000/900Gm NOS (OB) damaged box
1 6S8-GT $3.00 Philco 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) damaged box
1 6S8-GT $3.00 Philco 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) damaged box
1 6S8-GT $1.50 RCA Victor 140% diodes: 110%/110%/110% 1100/900Gm used (ob) ---
1 6S8-GT $1.50 GE 110% diodes: 110%/110%/110% 950/900Gm used (wb) white lettering
1 6S8-GT $1.50 GE 120% diodes: 120%/110%/120% 1100/900Gm used (wb) white lettering
1 6S8-GT $1.50 National Union 110% diodes: 110%/110%/110% 1050/900Gm used (ob) ---
1 6S8-GT $1.50 Hytron 90% diodes: 110%/110%/110% 750/900Gm used (ob) ---
1 12S8-GT $3.00 Cunningham 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 130% diodes: 110%/110%/110% 1050/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 120% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 130% diodes: 110%/110%/110% 1050/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 120% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 12S8-GT $3.00 Cunningham 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) ---
1 12S8-GT $3.00 Sylvania 140% diodes: 110%/110%/110% 1150/900Gm NOS (OB) green lettering
1 12S8-GT $3.00 Sylvania 140% diodes: 110%/110%/110% 1050/900Gm NOS (OB) green lettering
1 12S8-GT $3.00 Sylvania 140% diodes: 110%/110%/110% 1150/900Gm NOS (OB) green lettering
1 12S8-GT $3.00 Sylvania 130% diodes: 110%/110%/110% 1050/900Gm NOS (OB) green lettering
1 12S8-GT $3.00 Natioanl Union 120% diodes: 120%/110%/110% 950/900Gm NOS (OB) ---
1 12S8-GT $3.00 National Union 120% diodes: 110%/110%/110% 950/900Gm NOS (OB) green lettering
1 12S8-GT $3.00 RCA 130% diodes: 110%/110%/110% 1000/900Gm NOS (OB) silver lettering
1 12S8-GT $1.50 Emerson 120% diodes: 110%/110%/110% 1000/900Gm used (rb) ---
1 12S8-GT $1.50 Emerson 120% diodes: 110%/110%/120% 1000/900Gm used (rb) ---
1 6SD7-GT $4.00 Tung-Sol 120% 3000/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 115% 3000/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 110% 2900/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 120% 2900/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 130% 3200/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 110% 3000/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Tung-Sol 120% 3000/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Tung-Sol 120% 2800/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Tung-Sol 120% 2700/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Tung-Sol 120% 3000/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Raytheon 120% 2700/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Raytheon 130% 3000/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Raytheon 110% 2500/2500Gm NOS (OB) metal base band - JAN
1 6SD7-GT $4.00 Raytheon 110% 2600/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Raytheon 120% 2800/2500Gm NOS (OB) sealed in box
1 6SD7-GT $4.00 Sylvania 140% 3200/2500Gm NOS (OB) metal base band - black lettering
1 6SD7-GT $4.00 Sylvania 140% 3400/2500Gm NOS (OB) metal base band - black lettering
1 6SD7-GT $4.00 Sylvania 140% 3200/2500Gm NOS (OB) metal base band - black lettering
1 6SD7-GT $4.00 Sylvania 110% 2700/2500Gm NOS (OB) metal base band - black lettering
1 6SD7-GT $4.00 Sylvania 110% 2600/2500Gm NOS (OB) metal base band - green lettering
1 6SD7-GT $4.00 Sylvania 110% 2800/2500Gm NOS (OB) metal base band - green lettering
1 6SD7-GT $4.00 Sylvania 120% 3100/2500Gm NOS (OB) metal base band - green lettering
1 6SD7-GT $4.00 Ken-Rad 110% 2700/2500Gm NOS (OB) metal base band - damaged box
1 6SD7-GT $4.00 Zenith 120% 2700/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Chancellor 130% 3100/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Chancellor 140% 3000/2500Gm NOS (OB) metal base band
1 6SD7-GT $4.00 Arcturus untested sealed in box NOS (OB) ---
1 6SD7-GT $4.00 Arcturus untested sealed in box NOS (OB) ---
1 6SD7-GT $4.00 Arcturus untested sealed in box NOS (OB) ---
1 6SD7-GT $2.00 Tung-Sol 120% 2800/2500Gm used (rb) metal base band
1 6SD7-GT $2.00 Tung-Sol 140% 3000/2500Gm used (rb) metal base band
1 6SD7-GT $2.00 Tung-Sol 100% 2500/2500Gm used (rb) metal base band - JAN
1 6SD7-GT $2.00 CBS/Hytron 110% 2600/2500Gm used (rb) metal base band
1 6SD7-GT $2.00 Tung-Sol 120% 2700/2500Gm used (rb) metal base band
1 6SD7-GT $2.00 Tung-Sol 130% 3100/2500Gm used (rb) metal base band
1 6SD7-GT $2.00 Raytheon 110% 2800/2500Gm used (L) metal base band
1 6SD7-GT $2.00 Tung-Sol 140% 3300/2500Gm used (L) metal base band
1 6SD7-GT $2.00 Tung-Sol 120% 2500/2500Gm used (L) metal base band
1 6SD7-GT $2.00 Tung-Sol 110% 2800/2500Gm used (L) metal base band
1 6SD7-GT $2.00 unknown 90% 2200/2500Gm used (L) metal base band
1 6SD7-GT $2.00 Arcturus 1000% 2700/2500Gm used (L) metal base band
1 6SD7-GT $1.00 Tung-Sol 120% 3000/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 110% 2800/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 110% 2500/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 130% 3000/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 110% 2900/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 120% 2900/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 130% 3100/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 120% 3100/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 130% 3100/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 110% 2800/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 115% 2800/2500Gm NOS (OB) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Raytheon 115% 2600/2500Gm NOS (OB) metal base band - rust on base
1 6SD7-GT $1.00 Tung-Sol 95% 2500/2500Gm used (rb) metal base band - JAN - minor rust base
1 6SD7-GT $1.00 Tung-Sol 120% 3200/2500Gm used (rb) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 110% 2600/2500Gm used (rb) metal base band - JAN - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 90% 2200/2500Gm used (rb) metal base band - minor rust on base
1 6SD7-GT $1.00 Tung-Sol 120% 2800/2500Gm used (wb) metal base band - split base band

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, TT=Tall Tubular Style, GT=GT Style, 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 Radio 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

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

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Don't forget to visit our Discount Bargain Packs and Bargain Bin for more savings!

Email: MDB Ventures sales@mdbventures.com