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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
Quantity
Available | Tube
Type | Price
Each | Tube
Brand | Emission
Strength | Mutual
Conductance |
Description |
Notes
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| 1 | 5R4-G | $25.00 | RCA | 105%/105% | --- | NOS (wb) | (ST) black base
| | 1 | 5R4-GY | $25.00 | Raytheon | 110%/110% | --- | NOS (wb) | (ST) brown base
| | 1 | 5R4-GY | $30.00 | GE | 115%/115% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $28.00 | Ken-Rad | 110%/110% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $28.00 | Ken-Rad | 110%/110% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $30.00 | RCA | 110%/110% | --- | NOS (OB) | (ST) JAN - brown base
| | 1 | 5R4-GY | $27.00 | RCA | 110%/110% | --- | NOS (ob) | (ST) brown base
| | 1 | 5R4-GY | $28.00 | RCA | 115%/120% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $28.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $28.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $25.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) brown base
| | 1 | 5R4-GY | $25.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) brown base
| | 1 | 5R4-GY | $25.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) brown base
| | 1 | 5R4-GY | $25.00 | RCA | 110%/110% | --- | NOS (wb) | (ST) brown base
| | 1 | 5R4-GY | $18.00 | GE | 110%/110% | --- | used (rb) | (ST) JAN - brown base
| | 1 | 5R4-GY | $18.00 | CBS/Hytron | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (ob) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | Hallicrafters | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | FAA | 110%/110% | --- | used (rb) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | Raytheon | 100%/100% | --- | used (ob) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | Sheldon | 115%/115% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $15.00 | GE | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | Ken-Rad | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | Ken-Rad | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | Ken-Rad | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | Ken-Rad | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | Ken-Rad | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $15.00 | RCA | 110%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $14.00 | RCA | 110%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 110%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 110%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 110%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 110%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 115%/115% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 115%/115% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $14.00 | RCA | 115%/120% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 110%/105% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.50 | Ken-Rad | 110%/105% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $12.50 | Ken-Rad | 110%/105% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $12.50 | RCA | 105%/110% | --- | used (L) | (ST) US Navy - brown base
| | 1 | 5R4-GY | $12.50 | RCA | 105%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $12.50 | RCA | 105%/110% | --- | used (L) | (ST) JAN - brown base
| | 1 | 5R4-GY | $12.00 | RCA | 105%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 105%/110% | --- | used (L) | (ST) brown base
| | 1 | 5R4-GY | $12.00 | RCA | 105%/110% | --- | used (L) | (ST) brown base
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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.
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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