MDB Ventures Preoctal Radio Vacuum Tubes

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Type: 27 ( 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/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 27 $25.00 Raytheon 110% 1000 / 1000Gm ST - used (wb) smooth black plate - engraved base - four pillar tube - has label
1 27 $25.00 Arcturus 140% 1150 / 1000Gm ST - NOS (wb) perferated black plate
1 27 $10.00 Arcturus 90% 850 / 1000Gm ST - used (L) perferated black plate
1 NU-27 $25.00 National Union 140% 1250 / 1000Gm ST - NOS (wb) engraved base - mesh plate - (pl)
1 27 $15.00 National Union 105% 1100 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 100% 1000 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 115% 1350 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 120% 1200 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 130% 1000 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 120% 1250 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 110% 1200 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 National Union 100% 700 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 Super Airline 100% 1250 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $15.00 Super Airline 110% 1200 / 1000Gm ST - used (L) engraved base - mesh plate
1 NU-27 $15.00 National Union 140% 1200 / 1000Gm ST - used (L) engraved base - mesh plate
1 NU-27 $12.00 National Union 90% 950 / 1000Gm ST - used (L) engraved base - mesh plate
1 NU-27 $12.00 National Union 90% 1100 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $12.00 National Union 90% 1100 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $12.00 National Union 90% 1150 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $10.00 National Union 85% 1000 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $10.00 Ken-Rad 85% 950 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $7.50 Continental 120% 1150 / 1000Gm ST - used (L) engraved base - mesh plate - rattle in base
1 227 $5.00 Silvertone 70% 750 / 1000Gm ST - used (L) engraved base - mesh plate
1 27 $20.00 Westinghouse 140% 1200 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 140% 1200 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 140% 1200 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 140% 1200 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 140% 1150 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 120% 1200 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 National Union 115% 1250 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Philco 130% 1100 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Admiral 120% 1300 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Raytheon 140% 1250 / 1000Gm ST - NOS (wb) ribbed black plate
1 27 $20.00 Super Silvertone 140% 1100 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Super Silvertone 140% 1100 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Ken-Rad 130% 1350 / 1000Gm ST - NOS (wb) ribbed black plate
1 27 $20.00 GE 140% 1200 / 1000Gm ST - NOS (wb) ribbed black plate
1 27 $20.00 Wards Super Airline 140% 1300 / 1000Gm ST - NOS (wb) engraved base - ribbed black plate
1 27 $20.00 National Union 140% 1200 / 1000Gm ST - NOS (OB) damaged box - smooth black plate
1 27 $20.00 Sylvania 120% 1200 / 1000Gm ST - NOS (OB) smooth black plate - water damaged box
1 27 $20.00 Sylvania 120% 1250 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Sylvania 120% 1250 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Sylvania 130% 1150 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Hytron untested heater ok ST - NOS (OB) sealed in box
1 27 $20.00 RCA Victor 120% 1250 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 RCA 120% 1300 / 1000Gm ST - NOS (OB) smooth black plate - torn box flap - cat:321-83
1 27 $20.00 RCA 120% 1300 / 1000Gm ST - NOS (OB) smooth black plate - cat:321-84
1 27 $20.00 Long Life 130% 1350 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $20.00 Coronado 130% 1300 / 1000Gm ST - NOS (wb) ribbed black plate - torn box flap
1 27 $20.00 Super Silvertone 120% 1250 / 1000Gm ST - NOS (wb) smooth black plate
1 27 $10.00 Wards Super Airline 140% 1300 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $10.00 Westinghouse 140% 1300 / 1000Gm ST - used (L) smooth black plate
1 27 $10.00 National Union 100% 900 / 1000Gm ST - used (wb) smooth black plate - engraved base (pl)
1 27 $10.00 Philco 110% 1000 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 Philco 90% 1150 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 Philco 95% 1050 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 National Union 90% 900 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 National Union 90% 900 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 National Union 95% 1100 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 National Union 95% 950 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 National Union 90% 900 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 National Union 90% 1000 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 RCA / Cunningham 95% 1150 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 RCA / Cunningham 90% 1000 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 RCA / Cunningham 90% 900 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 RCA / Cunningham 90% 1050 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 RCA Radiotron 95% 1100 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 RCA Victor 95% 900 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Sylvania 95% 1000 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 Sylvania 90% 900 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Sylvania 90% 1050 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Sylvania 90% 1000 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Super Silvertone 95% 1000 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Super Silvertone 90% 1050 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Super Silvertone 90% 900 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Wards Super Airline 90% 950 / 1000Gm ST - used (L) ribbed black plate
1 27 $7.50 Wards Super Airline 90% 1050 / 1000Gm ST - used (L) engraved base - smooth black plate
1 27 $7.50 Raytheon 95% 1050 / 1000Gm ST - used (L) ribbed black plate
1 27 $7.50 Raytheon 90% 1000 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Zenith 95% 1100 / 1000Gm ST - used (L) smooth black plate
1 27 $7.50 Wizard 90% 950 / 1000Gm ST - used (L) smooth black plate
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