Welcome to MDB Ventures Audio Tube Store
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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
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1 | 6C5 | $7.50 | RCA / Cunningham | 120% | 2300 / 2000Gm | used (wb) | metal - stamped name and logo on tube - shoulder top |
1 | 6C5 | $7.50 | RCA / Cunningham | 110% | 2100 / 2000Gm | used (rb) | metal - stamped name and logo on tube - shoulder top |
1 | 6C5 | $5.00 | National Union | 120% | 2200 / 2000Gm | used (rb) | metal - shoulder top - stamped number |
1 | 6C5 | $2.50 | RCA | 115% | 2100 / 2000Gm | used (wb) | metal - silver lettering - shoulder top |
1 | 6C5 | $2.50 | RCA | 120% | 2100 / 2000Gm | used (rb) | metal - silver lettering - shoulder top |
1 | 6C5 | $2.50 | Sylvania | 110% | 2100 / 2000Gm | used (L) | metal - shoulder top - white lettering |
1 | 6C5 | $2.50 | RCA | 110% | 2200 / 2000Gm | used (L) | metal - silver lettering - shoulder top |
1 | 6C5 / VT-65 | $2.00 | RCA | 90% | 1700 / 2000Gm | used (L) | metal - silver lettering - shoulder top |
1 | 6C5-GT | $7.50 | Hyvac | 130% | 2200 / 2000Gm | NOS (OB) | metal base band |
1 | 6C5-GT | $7.50 | Hytron | 110% | 2150 / 2000Gm | NOS (OB) | metal base band |
1 | 6C5-GT | $7.50 | National Union | 110% | 2000 / 2000Gm | NOS (OB) | metal base band - damaged box |
1 | 6C5-GT | $5.00 | Philco | 140% | 2800 / 2000Gm | used (L) | metal base band |
1 | 6C5-GT | $2.00 | Raytheon | 95% | 1600 / 2000Gm | used (rb) | metal base band |
1 | 6C5-GT | $2.00 | Silvertone | 90% | 1500 / 2000Gm | used (L) | metal base band |
1 | 6C5-GT | $1.00 | Hytron (Bantam) | 120% | 2150 / 2000Gm | used (OB) | metal base band - band split |
1 | 6C5 | $3.00 | RCA | 130% | 2200 / 2000Gm | used (wb) | metal - silver lettering |
1 | 6C5 | $3.00 | Raytheon | 120% | 2200 / 2000Gm | used (rb) | metal |
1 | 6C5 | $3.00 | National Union | 120% | 2150 / 2000Gm | used (rb) | metal |
1 | 6C5 | $3.00 | National Union | 120% | 1900 / 2000Gm | used (rb) | metal |
1 | 6C5 | $3.00 | Cunningham | 110% | 2100 / 2000Gm | used (rb) | metal |
1 | 6C5 | $3.00 | Cunningham | 130% | 2400 / 2000Gm | used (rb) | metal |
1 | 6C5 | $3.00 | RCA | 115% | 2250 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 110% | 2100 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 120% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 110% | 2100 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 120% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5* | $3.00 | RCA | 120% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 110% | 2300 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 110% | 2100 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 105% | 2100 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 120% | 2300 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 110% | 1900 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5* | $3.00 | RCA | 110% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | RCA | 120% | 2300 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5* | $3.00 | RCA | 110% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5* | $3.00 | RCA | 110% | 2200 / 2000Gm | used (L) | metal - silver lettering |
1 | 6C5 | $3.00 | GE | 120% | 2300 / 2000Gm | used (L) | metal - white lettering |
1 | 6C5 | $3.00 | Sylvania | 115% | 2200 / 2000Gm | used (L) | metal - yellow lettering |
1 | 6C5 | $3.00 | Ken-Rad | 120% | 2300 / 2000Gm | used (L) | metal |
1 | 6C5* | $3.00 | Ken-Rad | 120% | 2200 / 2000Gm | used (L) | metal |
1 | 6C5* | $3.00 | Ken-Rad | 110% | 2150 / 2000Gm | used (L) | metal |
1 | 6C5 | $3.00 | Ken-Rad | 100% | 2000 / 2000Gm | used (L) | metal |
1 | 6C5 | $3.00 | Ken-Rad | 110% | 2100 / 2000Gm | used (L) | metal |
1 | 6C5 | $2.00 | RCA | 105% | 1900 / 2000Gm | used (OB) | metal - silver lettering |
1 | 6C5 | $2.00 | RCA | 100% | 1900 / 2000Gm | used (OB) | metal - red lettering |
1 | 6C5 | $2.00 | GE | 100% | 2100 / 2000Gm | used (L) | metal - white lettering |
1 | 6C5 | $2.00 | CBS | 105% | 2200 / 2000Gm | used (L) | metal |
1 | 6C5 / VT-65 | $4.00 | Ken-Rad | 110% | 2200 / 2000Gm | used (L) | metal - JAN |
1 | 6C5 / VT-65 | $4.00 | Ken-Rad | 125% | 2600 / 2000Gm | used (L) | metal |
1 | 6C5 / VT-65 | $4.00 | Ken-Rad | 130% | 2600 / 2000Gm | used (L) | metal - JAN |
1 | 6C5 / VT-65 | $3.00 | Ken-Rad | 100% | 1750 / 2000Gm | used (L) | metal - JAN |
1 | 6C5 / VT-65 | $2.00 | RCA | 95% | 2000 / 2000Gm | used (L) | metal - US Army |
1 | 6C5 / VT-65 | $2.00 | RCA | 95% | 2000 / 2000Gm | used (L) | metal - US Army |
1 | 6C5 / VT-65 | $1.50 | RCA | 90% | 1700 / 2000Gm | used (L) | metal - JAN - sholder top |
1 | 6C5 / VT-65 | $1.50 | Ken-Rad | 90% | 1900 / 2000Gm | used (L) | metal - JAN |
1 | 6C5 / VT-65 | $1.00 | RCA | 120% | 2200 / 2000Gm | used (rb) | metal - US Army - minor rust on tube |
1 | 6C5 / VT-65 | $1.00 | Ken-Rad | 130% | 2400 / 2000Gm | used (rb) | metal - JAN - minor rust on tube |
1 | 6C5 | $1.50 | Raytheon | 90% | 1500 / 2000Gm | used (rb) | metal |
1 | 6C5 | $1.50 | RCA | 90% | 2300 / 2000Gm | used (rb) | metal - silver lettering |
1 | 6C5 | $1.50 | RCA | 90% | 1500 / 2000Gm | used (OB) | metal - silver lettering |
1 | 6C5 | $1.50 | Delco | 90% | 1600 / 2000Gm | used (rb) | metal |
1 | 6C5 | $1.50 | Delco | 90% | 1800 / 2000Gm | used (rb) | metal |
1 | 6C5 | $1.50 | National Union | 90% | 1900 / 2000Gm | used (OB) | metal |
1 | 6C5 | $1.50 | National Union | 90% | 1800 / 2000Gm | used (OB) | metal |
1 | 6C5 | $1.00 | RCA | 120% | 2300 / 2000Gm | used (OB) | metal - silver lettering - JAN - minor rust on tube |
1 | 6C5 | $1.00 | Ken-Rad | 120% | 2250 / 2000Gm | used (OB) | metal - JAN - minor rust on tube |
1 | 6C5 | $1.00 | unknown | 120% | 2150 / 2000Gm | used (rb) | metal - minor rust on tube |
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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Don't forget to visit our
Discount Bargain Packs
and
Bargain Bin
for more savings!
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