MDB Ventures Radio Tubes Don't forget to visit our Discount Bargain Packs and Bargain Bin for more savings! Also be sure to see our Audio tube listings and Radio Vacuum Tube List and Transmitter and Ham Radio Tubes and "G" Style Radio Vacuum Tube List for more tubes. 6SK7     6137     CV1981 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/loktal, miniature, subminature, metal, power, transmitter tubes and many more. MDB Ventures Radio Tubes Qty Avail Tube Type Price Each Tube Brand Emission Strength Mutual Conduct Desc Notes 1 CV1981 $40.00 Mullard - Amerty 120% 2650 / 2000Gm used (wb) metal - red tube - Made in USA (special 6SK7) 1 CV1981 $40.00 Mullard - Amerty 130% 2500 / 2000Gm used (wb) metal - red tube - Made in USA (special 6SK7) 1 CV1981 $40.00 Mullard - Amerty 130% 2750 / 2000Gm used (wb) metal - red tube - Made in USA (special 6SK7) 1 CV1981 $40.00 Mullard - Amerty 120% 2500 / 2000Gm used (wb) metal - red tube - Made in USA (special 6SK7) 1 CV1981 $40.00 Mullard - Amerty 120% 2650 / 2000Gm used (wb) metal - red tube - Made in USA (special 6SK7) 1 6137 / 6SK7 $8.00 GE 130% 2600 / 2000Gm used (wb) metal tube 1 6SK7-WA $7.50 GE 110% 2300 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 120% 2300 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 110% 2400 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 120% 2400 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 110% 2400 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 130% 2500 / 2000Gm NOS (OB) metal - JAN - brown base 1 6SK7-WA $7.50 GE 120% 2400 / 2000Gm NOS (wb) metal - brown base 1 6SK7-WA $7.50 GE 110% 2450 / 2000Gm NOS (wb) metal - brown base 1 6SK7-WA $7.50 GE 120% 2350 / 2000Gm NOS (wb) metal - JAN - brown base 1 6SK7-WA $7.50 GE 120% 2300 / 2000Gm NOS (wb) metal - JAN - brown base 1 6SK7-WA $7.50 GE 120% 2400 / 2000Gm NOS (wb) metal - JAN - brown base 1 6SK7 / VT-117 $6.00 RCA 120% 2400 / 2000Gm NOS (OB) metal - JAN 1 6SK7 / VT-117 $6.00 RCA 120% 2300 / 2000Gm NOS (OB) metal - US Army - silver lettering 1 6SK7 / VT-117 $6.00 RCA 120% 2500 / 2000Gm NOS (OB) metal - US Army - silver lettering 1 6SK7 $5.00 RCA 120% 2300 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 RCA 120% 2400 / 2000Gm NOS (OB) metal - red lettering - missing box flap 1 6SK7 $5.00 RCA 120% 2400 / 2000Gm NOS (OB) metal - red lettering - missing box flap 1 6SK7 $5.00 RCA 120% 2250 / 2000Gm NOS (OB) metal - silver lettering 1 6SK7 $5.00 RCA 120% 2400 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 RCA 130% 2700 / 2000Gm NOS (OB) metal - silver lettering 1 6SK7 $5.00 RCA 130% 2600 / 2000Gm NOS (OB) metal - sealed in box 1 6SK7 $5.00 RCA 130% 2500 / 2000Gm NOS (OB) metal - silver lettering - torn box flap 1 6SK7 $5.00 RCA 110% 2200 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 RCA 110% 2150 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 RCA 120% 2350 / 2000Gm NOS (OB) metal - US Navy - silver lettering 1 6SK7 $5.00 RCA 120% 2200 / 2000Gm NOS (wb) metal - red lettering 1 6SK7 $5.00 GE 120% 2400 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 120% 2400 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 120% 2500 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 120% 2500 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 120% 2400 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 GE 120% 2300 / 2000Gm NOS (OB) metal - white lettering - torn box flap 1 6SK7 $5.00 GE 120% 2400 / 2000Gm NOS (OB) metal - rwd lettering 1 6SK7 $5.00 GE 120% 2600 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 120% 2500 / 2000Gm NOS (OB) metal - white lettering - torn box flap 1 6SK7 $5.00 GE 120% 2500 / 2000Gm NOS (wb) metal - white lettering 1 6SK7 $5.00 GE 110% 2300 / 2000Gm NOS (wb) metal - white lettering 1 6SK7 $5.00 GE 110% 2300 / 2000Gm NOS (wb) metal - white lettering 1 6SK7 $5.00 GE 110% 2200 / 2000Gm NOS (wb) metal - red lettering 1 6SK7 $5.00 GE 110% 2300 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 110% 2350 / 2000Gm NOS (wb) metal - white lettering 1 6SK7 $5.00 GE 140% 2700 / 2000Gm NOS (wb) metal - white lettering 1 6SK7 $5.00 GE 130% 2600 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 GE 110% 2400 / 2000Gm NOS (OB) metal - white lettering 1 6SK7 $5.00 Sylvania 120% 2300 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 Sylvania 120% 2400 / 2000Gm NOS (OB) metal - red lettering 1 6SK7 $5.00 Sylvania 130% 2500 / 2000Gm NOS (OB) metal - yellow lettering 1 6SK7 $5.00 Sylvania 130% 2500 / 2000Gm NOS (OB) metal - yellow lettering 1 6SK7 $5.00 Sylvania 110% 2400 / 2000Gm NOS (OB) metal - yellow lettering 1 6SK7 $5.00 Sylvania 130% 2300 / 2000Gm NOS (OB) metal - green lettering 1 6SK7 $5.00 Raytheon 130% 2500 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Raytheon 120% 2500 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Raytheon 130% 2600 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Raytheon 120% 2400 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Raytheon 130% 2550 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Raytheon 110% 2250 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 National Union 110% 2200 / 2000Gm NOS (wb) metal 1 6SK7 $5.00 National Union 120% 2400 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 CBS / Hytron 120% 2400 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 CBS 120% 2400 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Tubg-Sol 110% 2200 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Westinghouse 120% 2500 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Realistic 120% 2500 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Emerson 120% 2250 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Marconi 110% 2200 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 Philco 120% 2600 / 2000Gm NOS (OB) metal 1 6SK7 $5.00 unknown 120% 2600 / 2000Gm NOS (OB) metal - selaed in box 1 6SK7-GTY $7.50 Sylvania 120% 2400 / 2000Gm NOS (wb) metal base band - brown base 1 6SK7-GTY $7.50 Sylvania 120% 2400 / 2000Gm NOS (OB) metal base band - brown base 1 6SK7-GT / VT-117A $6.00 National Union 120% 2600 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT / VT-117A $6.00 National Union 120% 2400 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT / VT-117A $6.00 National Union 110% 2300 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT / VT-117A $6.00 Tung-Sol 120% 2350 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT / VT-117A $6.00 Tung-Sol 130% 2550 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT / VT-117A $6.00 Tung-Sol 120% 2450 / 2000Gm NOS (OB) metal base band - JAN 1 6SK7-GT $5.00 CBS 120% 2400 / 2000Gm NOS (OB) metal base band 1 6SK7-GT $5.00 CBS 130% 2500 / 2000Gm NOS (OB) metal base band 1 6SK7-GT $5.00 CBS / Hytron 110% 2400 / 2000Gm NOS (OB) metal base band - missing box flap 1 6SK7-GT $5.00 RCA 120% 2500 / 2000Gm NOS (OB) metal base band - red lettering 1 6SK7-GT $5.00 Philco 140% 2450 / 2000Gm NOS (OB) metal base band 1 6SK7-GT $5.00 National Union 110% 2400 / 2000Gm NOS (OB) metal base band 1 6SK7-GT $5.00 Sylvania 110% 2300 / 2000Gm NOS (OB) metal base band - green lettering - damaged box 1 6SK7-GT $5.00 Sylvania 120% 2400 / 2000Gm NOS (OB) metal base band - green lettering 1 6SK7-GT $5.00 Sylvania untested sealed in box NOS (OB) sealed in box 1 6SK7WA $5.00 GE 120% 2500 / 2000Gm used (wb) metal - brown base - JAN 1 6SK7WA $5.00 GE 100% 1900 / 2000Gm used (rb) metal - brown base - JAN 1 6SK7WA $5.00 GE 130% 2500 / 2000Gm used (rb) metal - brown base - JAN 1 6SK7 / VT-117 $3.00 RCA 110% 1800 / 2000Gm used (rb) metal - silver lettering 1 6SK7 / VT-117 $3.00 RCA 110% 2000 / 2000Gm used (rb) metal - silver lettering - JAN 1 6SK7 / VT-117 $3.00 RCA 110% 2250 / 2000Gm used (rb) metal - silver lettering - JAN 1 6SK7 / VT-117 $3.00 RCA 100% 2000 / 2000Gm used (wb) metal - silver lettering - US Army 1 6SK7 / VT-117 $3.00 Ken-Rad 110% 2400 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 Ken-Rad 100% 1900 / 2000Gm used (rb) metal 1 6SK7 $2.00 Ken-Rad 110% 2300 / 2000Gm used (rb) metal 1 6SK7 $2.00 Ken-Rad 130% 2550 / 2000Gm used (rb) metal 1 6SK7 $2.00 GM 120% 2500 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 GE 100% 1950 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 GE 110% 2250 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 RCA 100% 1900 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 100% 2200 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 Delta 100% 2100 / 2000Gm used (rb) metal 1 6SK7 $2.00 Delta 120% 2400 / 2000Gm used (rb) metal 1 6SK7 $2.00 Delta 110% 2250 / 2000Gm used (rb) metal 1 6SK7 $2.00 Sylvania 110% 2400 / 2000Gm used (rb) metal - yellow lettering 1 6SK7 $2.00 Sylvania 120% 2400 / 2000Gm used (rb) metal - yellow lettering 1 6SK7 $2.00 GE 100% 1800 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 GE 115% 2250 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 GE 140% 2200 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 GE 120% 2400 / 2000Gm used (rb) metal - white lettering 1 6SK7 $2.00 RCA 110% 2300 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 115% 2150 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 120% 2400 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 100% 1800 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 100% 2200 / 2000Gm used (rb) metal - silver lettering 1 6SK7 $2.00 RCA 120% 2500 / 2000Gm used (rb) metal - red lettering 1 6SK7 $2.00 RCA Victor 100% 1900 / 2000Gm used (rb) metal 1 6SK7 $2.00 Tung-Sol 110% 2300 / 2000Gm used (rb) metal 1 6SK7 $2.00 Sylvania 130% 2500 / 2000Gm used (rb) metal - green lettering 1 6SK7 $2.00 Sylvania 120% 2400 / 2000Gm used (rb) metal - yellow lettering 1 6SK7 $2.00 Sylvania 100% 1800 / 2000Gm used (rb) metal - yellow lettering 1 6SK7 $2.00 Ken-Rad 130% 2300 / 2000Gm used (wb) metal 1 6SK7 $2.00 Ken-Rad 100% 2000 / 2000Gm used (rb) metal 1 6SK7 $2.00 Ken-Rad 100% 2300 / 2000Gm used (rb) metal 1 6SK7 $2.00 Crosley by Ken-Rad 130% 2400 / 2000Gm used (wb) metal 1 6SK7 $2.00 Wizard 120% 2400 / 2000Gm used (rb) metal 1 6SK7 $2.00 GM 120% 2300 / 2000Gm used (rb) metal 1 6SK7 $2.00 GM 120% 2400 / 2000Gm used (rb) metal 1 6SK7 $2.00 Raytheon 105% 2000 / 2000Gm used (rb) metal 1 6SK7 $2.00 Raytheon 100% 2000 / 2000Gm used (rb) metal 1 6SK7 $2.00 Wards Super Airline 100% 1700 / 2000Gm used (rb) metal 1 6SK7 $2.00 Delco 110% 2250 / 2000Gm used (rb) metal 1 6SK7 $2.00 Delco 100% 1800 / 2000Gm used (rb) metal 1 6SK7 $2.00 RCA 105% 1500 / 2000Gm used (rb) metal - silver lettering 1 6SK7-GT / VT-117A $3.00 Sylvania 110% 2250 / 2000Gm used (rb) metal base band - black lettering - JAN 1 6SK7-GT / VT-117A $3.00 Sylvania 110% 2000 / 2000Gm used (rb) metal base band - black lettering - JAN 1 6SK7-GT / VT-117A $3.00 Sylvania 115% 2200 / 2000Gm used (rb) metal base band - black lettering - JAN 1 6SK7-GT / VT-117A $3.00 Zenith 110% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT / VT-117A $3.00 National Union 100% 1900 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Tung-Sol 100% 1800 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 National Union 130% 2250 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 GE 100% 2000 / 2000Gm used (rb) metal base band - red lettering 1 6SK7-GT $2.00 GE 130% 2300 / 2000Gm used (rb) metal base band - red lettering 1 6SK7-GT $2.00 GE 100% 1900 / 2000Gm used (rb) metal base band - red lettering 1 6SK7-GT $2.00 Raytheon 120% 2400 / 2000Gm used (rb) metal base band - red lettering 1 6SK7-GT $2.00 GM 120% 2200 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 GM 120% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 GM 110% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Sylvania 100% 2000 / 2000Gm used (rb) metal base band - black lettering 1 6SK7-GT $2.00 Sylvania 110% 2100 / 2000Gm used (rb) metal base band - green lettering 1 6SK7-GT $2.00 Sylvania 110% 2200 / 2000Gm used (rb) metal base band - black lettering 1 6SK7-GT $2.00 Sylvania 140% 2500 / 2000Gm used (rb) metal base band - black lettering 1 6SK7-GT $2.00 Philco 120% 2300 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Detrola 110% 2300 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Detrola 120% 2300 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Tung-Sol 120% 2200 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Zenith 130% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Zenith 105% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Ken-Rad 110% 2500 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Micro 100% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Wizard 120% 2200 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 Radiocoin 110% 2200 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FoMoCo 100% 2300 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FoMoCo 120% 2000 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FoMoCo 130% 2400 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FmMoCo 100% 2100 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FmCo 130% 2500 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FmCo 120% 2400 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 FmCo 130% 2500 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 unknown 140% 3000 / 2000Gm used (rb) metal base band 1 6SK7-GT $2.00 unknown 130% 2600 / 2000Gm used (rb) metal base band 1 6SK7-GT $1.00 National Union 110% 2250 / 2000Gm NOS (OB) metal base band - base band is split 1 6SK7-GT $1.00 National Union 120% 2300 / 2000Gm NOS (OB) metal base band - base band is split 1 6SK7-GT $1.00 National Union 120% 2600 / 2000Gm NOS (OB) metal base band - base band is split 1 6SK7-GT $1.00 Sylvania 100% 2100 / 2000Gm used (rb) metal base band - base band is split - black 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, (M)=Metal, (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 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. 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. Go back to the TOP Don't forget to visit our Discount Bargain Packs and Bargain Bin for more savings! Gmail Users Please read this note about incorrectly declared email as spam. This can be an issue as well with other free email providers like Hotmail, AOL, and Yahoo. MDB Ventures Home Contact MDB Ventures sales@mdbventures.com or sales@fourwater.com