Welcome to MDB Ventures
Collector Tubes 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 Collector Tubes
Qty
Avail | Tube
Type | Price
Each | Tube
Brand | Emission
Strength | Mutual
Conduct |
Desc |
Notes
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| 1 | ATP4 / ZA5502 / CV1366 | $15.00 | Valves Electronic | untested | heater ok | used (ST) | loose base - dual silver plates |
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| 1 | CV136 | $5.00 | unknown | untested | --- | unknown (wb) | --- |
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| 1 | CV138 / 6AM8 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV138 / 6AM8 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV138 / 6AM8 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV138 / 6AM8 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
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| 1 | CV140 | $3.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV140 | $3.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV140 | $3.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV140 | $3.00 | Valve Electronic | untested | --- | NOS (OB) | --- |
| 1 | CV140 | $1.50 | Valve Electronic | untested | --- | NOS (ob) | water damaged box |
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| 1 | CV1376 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
| 1 | CV1376 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
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| 1 | CV1635 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
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| 1 | CV2007 | $4.00 | unknown | untested | --- | NOS (L) | 9pin mini - waffer with solder tails welded to pins |
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| 1 | CV2010 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 7pin mini - waffer with solder tails welded to pins |
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| 1 | CV2015 | $10.00 | unknown | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2015 | $10.00 | unknown | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2015 | $10.00 | unknown | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2015 | $10.00 | unknown | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
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| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (wb) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 1 | CV2031 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
| 5 | CV2031 | $5.00ea | Valve Electronic | untested | --- | NOS (OB) | 9pin mini - waffer with solder tails welded to pins |
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| 1 | CV2127 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
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| 1 | CV2136 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
| 1 | CV2136 | $5.00 | Valve Electronic | untested | --- | NOS (OB) | 9pin mini |
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| 1 | CV2194 | $5.00 | Zaerix / STC | untested | --- | NOS (OB) | 7pin mini - England |
| 1 | CV2194 | $5.00 | Zaerix / STC | untested | --- | NOS (OB) | 7pin mini - England |
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| 1 | CV2241 | $5.00 | Chelmer Valve | untested | --- | NOS (OB) | subminiature tube - wire tails |
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| 1 | CV2459 / SCI-800 | $5.00 | GEC | untested | --- | NOS (OB) | --- |
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| 1 | CV2460-SCI / 1000 | $4.00 | GEC | untested | --- | NOS (OB) | box flap missing - Ser no. 109 |
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| 1 | CV4014 | $5.00 | Valve Electronic | untested | --- | NOS (wb) | 7pin mini - waffer with solder tails welded to pins |
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| 1 | CV4055 | $5.00 | Valve Electronic | untested | --- | used (OB) | 9pin mini |
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| 1 | CV5060 | $5.00 | Pinnacle | untested | --- | NOS (OB) | 9pin mini |
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| 1 | DAF41 | $7.50 | Philips | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | DAF96 | $2.50 | Amperex | untested | --- | NOS (OB) | 7pin mini |
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| 1 | DF97 | $5.00 | Amperex | untested | --- | NOS (OB) | 7pin mini - bugle boy - torn box flap |
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| 1 | EAF42 | $8.00 | Telefunken | untested | --- | used (wb) | 8pin mini - glass base (6CT7) |
| 1 | EAF42 | $8.00 | Mullard | untested | --- | used (wb) | 8pin mini - glass base (6CT7) |
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| 1 | EB41 | $5.00 | Valvo | untested | --- | used (L) | 8pin mini - glass base |
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| 1 | EBC41 | $5.00 | Valvo | untested | --- | NOS (wb) | 8pin mini - glass base |
| 1 | EBC41 / 6CV7 | $5.00 | Amperex | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | EBC81 / 6BD7 | $2.50 | Telefunken | 40dmc diodes:90% / 100% | --- | used weak (wb) | 9pin mini |
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| 1 | EBF83 | $2.50 | Amperex | untested | --- | NOS (OB) | 9pin mini |
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| 1 | ECH42 / 6CU7 | $5.00 | Valvo | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | ECL11 | $25.00 | Siemens / Rohren | untested | --- | NOS (OB) | (ST) in original German box (cat:Col-1c) |
| 1 | ECL11 | $25.00 | Siemens / Rohren | untested | --- | NOS (OB) | (ST) in original German box - damaged box (cat:Col-1c) |
| 1 | ECL11 | $25.00 | Siemens / Rohren | untested | --- | NOS (OB) | (ST) in original German box - damaged box (cat:Col-1c) |
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| 1 | ECL83 | $10.00 | Amperex | untested | --- | NOS (OB) | 8pin mini - bugle boy |
| 1 | ECL83 | $10.00 | Amperex | untested | --- | NOS (OB) | 8pin mini - bugle boy |
| 1 | ECL83 | $10.00 | Amperex | untested | --- | NOS (OB) | 8pin mini - bugle boy |
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| 1 | EF40 | $7.50 | Amperex | untested | --- | NOS (OB) | 8pin mini - glass base |
| 1 | EF40 | $7.50 | Amperex | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | EF41 | $7.50 | Siemens | untested | --- | NOS (OB) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $7.50 | Amperex | untested | --- | used (OB) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $4.00 | Valvo | untested | --- | used (wb) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $4.00 | Valvo | untested | --- | used (wb) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $4.00 | Valvo | untested | --- | used (wb) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $5.00 | Telefunken | untested | --- | used (wb) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $5.00 | Telefunken | untested | --- | used (wb) | 8pin mini - glass base |
| 1 | 6CJ5 / EF41 | $5.00 | Telefunken | untested | --- | used (wb) | 8pin mini - glass base |
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| 1 | EF42 | $7.50 | Valvo | untested | --- | NOS (OB) | 8pin mini - glass base |
| 1 | EF42 | $7.50 | Mullard | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | EF37A | $5.00 | BVA | untested | --- | used (wb) | (GT) paint shield flaking off |
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| 1 | EF80 | $10.00 | Mullard | untested | --- | used (wb) | Bentley Valve label - includes paper slip 'Bentley Acoustic Corporation' |
| 1 | EF80 | $10.00 | Telefunken | untested | --- | NOS (OB) | --- |
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| 1 | EF85 | $4.00 | unknown | untested | --- | unknown (wb) | obscured marking on tube |
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| 1 | EF91 | $10.00 | Amperex | untested | --- | NOS (OB) | 7 pin mini - bugle boy |
| 1 | EF91 | $5.00 | Mullard | untested | --- | used (rb) | 7 pin mini |
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| 1 | EF94 | $5.00 | Valvo by Amperex | untested | --- | NOS (OB) | 7pin mini |
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| 1 | EF98 | $2.50 | Amperex | untested | --- | NOS (OB) | 7pin mini - bugle boy |
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| 1 | EL41 | $7.50 | Telefunken | untested | --- | NOS (OB) | 8pin mini - glass base |
| 1 | 6CK5 / EL41 | $7.50 | Amperex | untested | --- | NOS (OB) | 8pin mini - glass base |
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| 1 | EL91 | $10.00 | Bentley Valve Corporation | untested | --- | unknown (wb) | --- |
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| 1 | EY86 | $2.00 | Mullard | untested | --- | used (rb) | 9pin miniature |
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| 6 | HS | $5.00ea | Conant Laboratories | untested | --- | NOS (OB) | copper oxide instrument rectifier |
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| 4 | M8142 | $4.00ea | Mullard | untested | --- | NOS (OB) | 7pin miniature - wire tails |
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| 1 | P61 | $20.00 | Mazda | untested | heater ok | used (short ST) | paint shield |
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| 1 | PCF80 | $10.00 | Bentley Accoustic Corporation | untested | --- | NOS (OB) | --- |
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| 1 | QS1222 / 800 | $10.00 | English Electric Valve | untested | --- | NOS (OB) | --- |
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| 1 | QS1222 / 1400 | $10.00 | English Electric Valve | untested | --- | NOS (OB) | --- |
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| 1 | QQV03-10 | $5.00 | Mullard | untested - heaters ok | --- | used (L) |
 QQV03-10 |
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| 1 | RS391 | $100.00 | Telefunken | untested | --- | used (rb) |
100 Watt transmitter pentode |
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| 1 | TH41 | $10.00 | Ediswan / Mazda | untested | --- | used (OB) | octal base - paint shield - Vallance & Davidson label |
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| 1 | UX-216-B | $5.00 | RCA | box only | --- | used (OB) | 
collector tube box only (see pics) |
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| 1 | VU11-10E / 146 | $5.00 | Marconi | dead | no heater | used (L) | display only - four pin euro base |
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| 1 | VU120A-10E / 807 | $15.00 | unknown | untested | heater ok | used (L) | glass arbors - four pin euro base + cap - smooth silver plate (cat:Col-1c) |
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| 1 | VU134-10E / 100B | $15.00 | unknown | untested | heater ok | used (rb) | glass arbors - four pin euro base - smooth silver plate |
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| 1 | WE-310A | $200.00 | Western Electric | 100% | 1800/1800Gm | used (OB) |  |
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| 1 | WE701 | $50.00 | Western Electric | untested | --- | used (rb) | 
transmitter tetrode |
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| 1 | X-155 | $5.00 | Philco | untested | --- | NOS (OB) | --- |
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| 2 | X-6090 | $20.00 | Sylvania | untested | --- | NOS (OB) | Thermalcouple? |
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| 1 | YL1130 | $20.00 | Mullard | untested | --- | NOS (wb) | gold pins |
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| 1 | Z2300 | $50.00 | GE | untested | Engineering Samples | NOS (OB) | Includes curve trace document with pinout (click on link for more info) - These are three tubes being sold as a set |
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| 1 | Mystery Tube | $20.00 | unknown mystery tube | untested | --- | used (L) | 
Unknown cool looking mystery 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 Collector 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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