MDB Ventures Preoctal Radio Vacuum Tubes


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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/loktal, miniature, subminature, metal, power, transmitter tubes and many more.

MDB Ventures Preoctal Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 71-A $90.00 Sylvania 120% 2000 / 1650Gm ST - NOS (wb) bayonet pin on base - engraved base
1 71-A $60.00 National Union 120% 1800 / 1650Gm ST - used (wb) bayonet pin on base
1 71-A $45.00 Wards 90% 1700 / 1650Gm ST - used (wb) --
1 79 $6.00 Philco 115% / 120% 1200 / 1000: 1050 / 1000 ST - NOS (OB) engraved base
1 79 $6.00 Philco 105% / 100% 1100 / 1000: 1050 / 1000 ST - NOS (OB) engraved base
1 79 $6.00 Sylvania 110% / 115% 1100 / 1000: 1100 / 1000 ST - NOS (wb) engraved base
1 79 $6.00 Nu-Star 140% / 105% 1450 / 1000: 1000 / 1000 ST - NOS (ob) engraved base - damaged box
1 79 $5.00 Philco 115% / 115% 1400 / 1000: 1250 / 1000 ST - NOS (wb) ---
1 79 $5.00 Philco untested heater ok ST - NOS (OB) sealed in box
1 79 $5.00 RCA 120% / 120% 1150 / 1000: 1200 / 1000 ST - NOS (OB) ---
1 79 $5.00 RCA / Cunningham 100% / 100% 1000 / 1000: 1050 / 1000 ST - NOS (ob) damaged box
1 79 $5.00 RCA / Cunningham untested heater ok ST - NOS (OB) sealed in box
1 79 $5.00 RCA / Cunningham untested heater ok ST - NOS (OB) sealed in box
1 79 $5.00 RCA 120% / 125% 1050 / 1000: 1000 / 1000 ST - NOS (OB) box end flap missing
1 79 $5.00 Zenith 115% / 115% 1250 / 1000: 1400 / 1000 ST - NOS (OB) ---
1 79 $5.00 Zenith 115% / 115% 1250 / 1000: 1400 / 1000 ST - NOS (OB) ---
1 79 $5.00 National Union 110% / 110% 1200 / 1000: 1100 / 1000 ST - NOS (ob) water damaged box
1 79 $5.00 Wizard 100% / 120% 1100 / 1000: 1250 / 1000 ST - NOS (ob) damaged box
1 79 $3.00 Sylvania 120% / 125% 1400 / 1000: 1200 / 1000 ST - used (L) ---
1 79 $3.00 Sylvania 120% / 115% 1200 / 1000: 1250 / 1000 ST - used (L) ---
1 79 $3.00 RCA 120% / 110% 1200 / 1000: 1200 / 1000 ST - used (L) ---
1 79 $2.50 Arcturus 100% / 90% 1000 / 1000: 1000 / 1000 ST - used (L) ribbed cap
1 81 $10.00 National Union 100% --- ST - used (L) engraved base - bayonet pin on base - large bulb
1 81 $10.00 RCA Radiotron 100% --- ST - used (L) engraved base - bayonet pin on base - large bulb
1 81 $10.00 Tung-Sol 100% --- ST - used (L) engraved base - bayonet pin on base - small bulb
1 81 $10.00 RCA Radiotron 100% --- ST - used (L) bayonet pin on base - large bulb
1 81 $10.00 RCA Radiotron 100% --- ST - used (L) bayonet pin on base - large bulb
1 81 $10.00 RCA 105% --- ST - used (L) bayonet pin on base - large bulb
1 81 $10.00 RCA 100% --- ST - used (L) bayonet pin on base - large bulb - cat:402-340
1 81 $10.00 Super Silvertone 100% --- ST - used (L) bayonet pin on base - small bulb (pl)
1 81 $8.00 Sylvania 110% --- ST - used (L) bayonet pin on base - small bulb - rattle inside base - cat:402-339
1 81 $8.00 Tung-Sol 120% --- ST - used (L) bayonet pin on base - large bulb - particles inside
1 81 $8.00 National Union 95% --- ST - used (L) engraved base - bayonet pin on base - large bulb - particles inside
1 81 $8.00 National Union 90% --- ST - used (L) engraved base - bayonet pin on base - large bulb
1 83-V $24.00 Raytheon 120% / 120% --- ST - NOS (wb) engraved base - four pillar tube (pl)
1 83-V $20.00 Sylvania 120% / 120% --- ST - NOS (wb) ---
1 83-V $20.00 Sylvania 115% / 115% --- ST - NOS (wb) ---
1 83-V $20.00 Philco 115% / 115% --- ST - NOS (OB) ---
1 83-V $10.00 National Union 120% / 120% --- ST - used (rb) ---
1 83-V $10.00 GE 115% / 115% --- ST - used (wb) ---
1 83-V $10.00 RCA Victor 120% / 120% --- ST - used (L) ---
1 83-V $10.00 RCA 110% / 100% --- ST - used (L) ---
1 83-V $10.00 GE 120% / 120% --- ST - used (L) ---
1 83-V $10.00 Philco 120% / 120% --- ST - used (L) ---
1 83-V $5.00 Sylvania 80% / 80% --- ST - used (rb) ---
1 NU-85 $5.00 National Union 100% diodes: 120% / 110% 1100 / 975Gm ST - used (L) engraved base
1 85 $3.50 National Union 95% diodes: 120% / 120% 1100 / 975Gm ST - used (L) engraved base
1 85 $3.50 National Union 115% diodes: 110% / 120% 1250 / 975Gm ST - used (L) engraved base
1 85 $3.50 Silvertone 90% diodes: 110% / 120% 1000 / 975Gm ST - used (L) engraved base - cat:312-146
1 85 $3.50 Silvertone 110% diodes: 110% / 120% 1200 / 975Gm ST - used (L) engraved base (pl)
1 85 $3.50 Silvertone 150% diodes: 120% / 120% 1500 / 975Gm ST - used (L) engraved base - cat:312-134
1 85 $3.50 Silvertone 110% diodes: 120% / 120% 1200 / 975Gm ST - used (L) engraved base
1 85 $3.50 Ken-Rad 100% diodes: 120% / 120% 1100 / 975Gm ST - used (L) engraved base
1 85 $3.50 Philco 110% diodes: 115% / 120% 1200 / 975Gm ST - used (L) engraved base
1 85 $3.50 Sylvania 100% diodes: 110% / 120% 1200 / 975Gm ST - used (L) engraved base - black coat
1 85 $3.50 Sylvania 120% diodes: 120% / 120% 1300 / 975Gm ST - used (L) engraved base - black coat
1 85 $3.00 National Union 120% diodes: 120% / 120% 1250 / 975Gm ST - used (L) ---
1 85 $3.00 RCA 100% diodes: 110% / 120% 1200 / 975Gm ST - used (L) ---
1 85 $3.00 RCA 110% diodes: 125% / 120% 1200 / 975Gm ST - used (L) ---
1 85 $3.00 RCA 100% diodes: 110% / 110% 1150 / 975Gm ST - used (L) ---
1 85 $3.00 Sylvania 110% diodes: 115% / 125% 1050 / 975Gm ST - used (L) ---
1 85 $3.00 Philco 110% diodes: 120% / 120% 1200 / 975Gm ST - used (L) ---
1 85 $3.00 Tung-Sol 105% diodes: 115% / 120% 1150 / 975Gm ST - used (L) ---
1 85 $3.00 unknown 115% diodes: 120% / 120% 1350 / 975Gm ST - used (L) ---
1 85 $2.50 RCA / Cunningham 110% diodes: 120% / 125% 1200 / 975Gm ST - used (L) engraved base - rattle in base
1 NU-89T $8.00 National Union 110% 1650 / 1550Gm ST - used (L) cat:32-601 (pl)
1 89Y $4.00 Sylvania 120% 1600 / 1550Gm ST - used (L) brown base - gray coat
1 89 $3.50 RCA 125% 1750 / 1550Gm ST - used (L) brown base US Navy - gray coat
1 89 $3.50 RCA 110% 1550 / 1550Gm ST - used (L) brown base US Navy - gray coat
1 89 $3.50 RCA 110% 1700 / 1550Gm ST - used (L) brown base US Navy - gray coat - cat:312-182
1 89 $3.50 RCA 110% 1550 / 1550Gm ST - used (L) brown base US Navy - gray coat
1 89 $3.50 RCA 110% 1550 / 1550Gm ST - used (L) brown base US Navy - gray coat
1 89 $3.50 RCA 110% 1700 / 1550Gm ST - used (L) brown base US Navy - gray coat
1 89 $3.50 RCA / Cunningham 110% 1700 / 1550Gm ST - used (L) engraved base
1 89 $3.50 RCA / Cunningham 110% 1750 / 1550Gm ST - used (rb) engraved base
1 89 $3.50 RCA / Cunningham 100% 1550 / 1550Gm ST - used (L) engraved base
1 89 $3.50 National Union 120% 1800 / 1550Gm ST - used (L) engraved base - cat:32-511
1 89 $3.50 National Union 100% 1650 / 1550Gm ST - used (L) engraved base
1 89 $3.50 Tung-Sol 130% 2000 / 1550Gm ST - used (L) engraved base
1 89 $3.50 Tung-Sol 100% 1550 / 1550Gm ST - used (L) engraved base
1 89 $3.50 Cunningham 100% 1600 / 1550Gm ST - used (L) engraved base
1 89 $3.50 GM 105% 1250 / 1550Gm ST - used (L) engraved base
1 89 $3.50 Super Airline 100% 1500 / 1550Gm ST - used (L) engraved base
1 89 $3.00 Sylvania 130% 2000 / 1550Gm ST - used (L) cat:22-351 (pl)
1 89 $3.00 Sylvania 110% 1600 / 1550Gm ST - used (L) ---
1 89 $3.00 RCA 100% 1700 / 1550Gm ST - used (L) engraved base - paint on tube
1 89 $3.00 RCA Radiotron 105% 1650 / 1550Gm ST - used (L) engraved base - cat:32-651
1 89 $3.00 RCA 95% 1550 / 1550Gm ST - used (L) ---
1 89 $3.00 Ken-Rad 100% 1800 / 1550Gm ST - used (L) black coat
1 89 $2.50 unknown 95% 1500 / 1550Gm ST - used (L) paint 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, 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.

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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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com