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Type: 5X3 , 6A6 , 6D7 , 6Y5 , 6Z5 ( NOS and Used )
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 Preoctal Tubes
Quantity
Available | Tube
Type | Price
Each | Tube
Brand | Emission
Strength | Mutual
Conductance |
Description |
Notes
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| 1 | 5X3 | $20.00 | National Union | 110%/105% | -- | ST - NOS (OB) | brown base - damaged box
| | 1 | 5X3 | $20.00 | Tung-Sol | 105%/110% | -- | ST - NOS (OB) | JAN - brown base
| | 1 | 6A6 | $10.00 | GE | 120%/120% | 1750:1800/1500Gm | ST - NOS (OB) | sealed in box - damaged box
| | 1 | 6A6 | $12.00 | GE | 115%/120% | 1700:1750/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $10.00 | GE | 110%/110% | 1650:1650/1500Gm | ST - NOS (OB) | sealed in box - damaged box
| | 1 | 6A6 | $10.00 | GE | 110%/120% | 1650:1650/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $12.00 | GE | 110%/110% | 1600:1650/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $10.00 | GE | 120%/110% | 1750:1550/1500Gm | ST - NOS (OB) | sealed in box - damaged box
| | 1 | 6A6 | $10.00 | GE | 110%/110% | 1550:1650/1500Gm | ST - NOS (OB) | sealed in box - damaged box
| | 1 | 6A6 | $10.00 | GE | 115%/115% | 1750:1750/1500Gm | ST - NOS (OB) | sealed in box - damaged box
| | 1 | 6A6 | $12.00 | GE | 110%/115% | 1600:1600/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $12.00 | GE | 120%/120% | 1750:1800/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $10.00 | GE | 120%/130% | 1650:1800/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $12.00 | GE | 120%/120% | 1700:1750/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $12.00 | Cunningham | 105%/110% | 1800:1900/1500Gm | ST - NOS (OB) | sealed in box - cat:401-568
| | 1 | 6A6 | $9.00 | Westinghouse | 115%/100% | 1500:1600/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | Coronado | 110%/110% | 1550:1500/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $12.00 | Delco | 110%/110% | 1600:1650/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $10.00 | Delco | 110%/120% | 1650:1650/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $10.00 | Delco | 120%/120% | 1750:1750/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | Delco | 110%/110% | 1500:1600/1500Gm | ST - NOS (OB) | damaged box - oem box
| | 1 | 6A6 | $9.00 | RCA | 100%/100% | 1500:1500/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $9.00 | RCA | 100%/100% | 1700:1650/1500Gm | ST - NOS (OB) | torn box flap
| | 1 | 6A6 | $10.00 | RCA | 110%/110% | 1550:1550/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $10.00 | RCA | 110%/110% | 1500:1500/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | RCA | 110%/110% | 1550:1550/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | RCA | 120%/120% | 1650:1650/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | RCA | 110%/110% | 1550:1550/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $10.00 | National Union | 125%/125% | 1700:1700/1500Gm | ST - NOS (OB) | --
| | 1 | 6A6 | $15.00 | National Union | 120%/120% | 1600:1600/1500Gm | ST - NOS (OB) | square plate - damaged box
| | 1 | 6A6 | $10.00 | National Union | 120%/120% | 1600:1550/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $12.00 | Sylvania | 110%/110% | 1700:1700/1500Gm | ST - NOS (OB) | sealed in box
| | 1 | 6A6 | $12.00 | Sylvania | 110%/110% | 1550:1600/1500Gm | ST - NOS (OB) | sealed in box - cat:401-0001
| | 1 | 6A6 | $9.00 | Emerson | 100%/110% | 1550:1600/1500Gm | ST - NOS (OB) | US Army
| | 1 | 6A6 | $10.00 | Marconi | 110%/115% | 1550:1600/1500Gm | ST - NOS (OB) | damaged box
| | 1 | 6A6 | $10.00 | Tung-Sol | 120%/120% | 1650:1650/1500Gm | ST - NOS (OB) | cat:403-30
| | 1 | 6A6 | $10.00 | RCA | 120%/120% | 1700:1700/1500Gm | ST - NOS (wb) | JAN
| | 1 | 6A6 | $10.00 | GE | 130%/130% | 1800:1800/1500Gm | ST - NOS (wb) | --
| | 1 | 6A6 | $3.00 | Marconi | 120%/115% | 1700:1650/1500Gm | ST - used - leaky 10Mohm (OB) | --
| | 1 | 6A6 | $5.00 | RCA | 105%/110% | 1500:1500/1500Gm | ST - used (wb) | --
| | 1 | 6A6 | $5.00 | RCA | 120%/120% | 1600:1600/1500Gm | ST - used (wb) | JAN
| | 1 | 6A6 | $5.00 | RCA | 110%/110% | 1600:1600/1500Gm | ST - used (rb) | cat:312:162
| | 1 | 6A6 | $4.00 | RCA/Cunningham | 95%/100% | 1400:1450/1500Gm | ST - used (wb) | engraved base
| | 1 | 6A6 | $5.00 | Arcturus | 110%/120% | 1300:1500/1500Gm | ST - used (rb) | --
| | 1 | 6A6 | $5.00 | National Union | 115%/110% | 1450:1550/1500Gm | ST - used (rb) | engraved base
| | 1 | 6A6 | $4.50 | National Union | 100%/100% | 1400:1450/1500Gm | ST - used (L) | engraved base
| | 1 | 6A6 | $4.50 | Ken-Rad | 100%/100% | 1350:1400/1500Gm | ST - used (L) | engraved base
| | 1 | 6A6 | $3.00 | Ken-Rad | 85%/90% | 1250:1350/1500Gm | ST - used (L) | --
| | 1 | 6A6 | $5.00 | Raytheon | 110%/110% | 1450:1400/1500Gm | ST - used (L) | engraved base
| | 1 | 6A6 | $4.50 | GE | 105%/115% | 1450:1600/1500Gm | ST - used (L) | --
| | 1 | 6A6 | $4.50 | RCA | 115%/105% | 1600:1450/1500Gm | ST - used (L) | cat:312-61
| | 1 | 6A6 | $4.00 | RCA/Cunningham | 105%/95% | 1500:1250/1500Gm | ST - used (L) | engraved base
| | 1 | 6A6 | $4.50 | RCA | 120%/105% | 1300:1450/1500Gm | ST - used (L) | ---
| | 1 | 6A6 | $4.50 | RCA | 110%/105% | 1550:1600/1500Gm | ST - used (L) | US Army
| | 1 | 6A6 | $4.50 | RCA | 110%/115% | 1650:1600/1500Gm | ST - used (L) | ---
| | 1 | 6D7 | $20.00 | National Union | 150% | 1300/1125Gm | NOS (OB) | factory installed goat shield - minor rust on shield - box flap missing
| | 1 | 6Y5 | $8.00 | Majestic | 100%/100% | -- | ST - used (OB) | engraved base - paint shield
| | 1 | 6Z5 | $6.00 | National Union | 110%/110% | -- | ST - NOS (OB) | sealed in box
| | 1 | 6Z5 | $6.00 | National Union | 110%/110% | -- | ST - NOS (OB) | sealed in box
| | 1 | 6Z5 | $5.00 | Majestic | 105%/105% | -- | ST - NOS (OB) | engraved base
| | 1 | 6Z5 | $5.00 | Majestic | 100%/100% | -- | ST - NOS (OB) | engraved base
| | 1 | 6Z5 | $5.00 | Majestic | 100%/100% | -- | ST - NOS (OB) | engraved base
| | 1 | 6Z5 | $3.00 | National Union | 100%/110% | -- | ST - used (wb) | engraved base
| | 1 | 6Z5 | $3.00 | Majestic | 100%/100% | -- | ST - used (rb) | engraved 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, 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 preoctal 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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