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 1A4 $10.00 Super Silvertone 130% 850 / 750Gm ST - NOS (wb) engraved base
1 1A4 $6.00 Philco 120% 900 / 750Gm ST - used (L) engraved base
1 1A4T $6.00 National Union 120% 750 / 750Gm ST - used (L) --
1 1A4T $6.00 Philco 130% 750 / 750Gm ST - used (L) ---
1 1A4P $8.00 GE 100% 850 / 750Gm ST - NOS (ob) damaged box
1 1A4P $8.00 GE 140% 1000 / 750Gm ST - NOS (ob) damaged box
1 1A4P $8.00 Zenith 130% 1000 / 750Gm ST - NOS (ob) --
1 1A4P $8.00 Philco 120% 950 / 750Gm ST - NOS (ob) --
1 1A4P $8.00 Philco 120% 900 / 750Gm ST - NOS (ob) damaged box
1 1A4P $8.00 Sylvania 140% 1000 / 750Gm ST - NOS (ob) --
1 1A4P $8.00 Sylvania 130% 900 / 750Gm ST - NOS (ob) --
1 1A4P $8.00 RCA 110% 900 / 750Gm ST - NOS (ob) damaged box
1 1A6 $6.00 Ken-Rad 120% 600 / 470: 300 / 190Gm ST - NOS (ob) (H)
1 1A6 $6.00 RCA 150% 470 / 470: 400 / 190Gm ST - NOS (ob) (H)
1 1A6 $6.00 RCA 140% 600 / 470: 350 / 190Gm ST - NOS (ob) (H)
1 1A6 $6.00 RCA 150% 700 / 470: 375 / 190Gm ST - NOS (ob) (H)
1 1A6 $6.00 Philco 110% 650 / 470: 200 / 190Gm ST - NOS (ob) (H)
1 1A6 $6.00 Hytron untested heater ok ST - NOS (ob) sealed in box - damaged box
1 1A6 $4.00 Wards Super Airline 100% 750 / 470: 350 / 190Gm ST - used (rb) (H) engraved base
1 1A6 $4.00 Marconi 110% 800 / 470: 300 / 190Gm ST - used (L) (H)
1 1A6 $4.00 Wards Super Airline 150% 650 / 470: 400 / 190Gm ST - used (L) (H)
1 1A6 $4.00 RCA / Cunningham 100% 600 / 470: 350 / 190Gm ST - used (L) engraved base (H) cat:402-132
1 1B4 $12.00 RCA untested heater ok ST - NOS (ob) sealed in box
1 1B4P $9.00 RCA 110% 750 / 640Gm ST - NOS (ob) damaged box
1 1B4P $9.00 Tung-Sol 120% 800 / 640Gm ST - NOS (ob) damaged box
1 1B4P $9.00 Wizard 120% 850 / 640Gm ST - NOS (ob) --
1 1B4P $9.00 Arcturus 140% 800 / 640Gm ST - NOS (wb) oem box
1 1B4P $9.00 National Union 120% 800 / 640Gm ST - NOS (wb) damaged box
1 1B5 $5.00 Hytron untested heater ok ST - NOS (ob) sealed in box
1 1B5 $5.00 Sylvania 110%: diodes 100% / 90% 750 / 575Gm ST - NOS (ob) --
1 1B5 $5.00 Sylvania 110%: diodes 100% / 90% 650 / 575Gm ST - NOS (ob) --
1 1B5 $5.00 Sylvania 110%: diodes 100% / 90% 700 / 575Gm ST - NOS (ob) --
1 1B5 $3.50 Sylvania 130%: diodes 95% / 100% 750 / 575Gm ST - used (L) --
1 1B5 / 25S $5.00 Philco 110%: diodes 100% / 90% 700 / 575Gm ST - NOS (ob) sealed in box
1 1B5 / 25S $5.00 Philco 120%: diodes 110% / 110% 700 / 575Gm ST - NOS (ob) engraved base
1 1B5 / 25S $5.00 Philco 140%: diodes 110% / 110% 700 / 575Gm ST - NOS (ob) --
1 1B5 / 25S $5.00 National Union 110%: diodes 100% / 100% 650 / 575Gm ST - NOS (wb) engraved base
1 1B5 / 25S $3.50 International 120%: diodes 100% / 110% 750 / 575Gm ST - used (L) engarved base
1 1B5 / 25S $3.50 Sylvania 140%: diodes 120% / 120% 700 / 575Gm ST - used (rb) engraved base
1 1B5 / 25S $3.50 Super Silvertone 120%: diodes 110% / 100% 725 / 575Gm ST - used (L) --
1 1B5 / 25S $2.50 Sylvania 100%: diodes 105% / 95% 650 / 575Gm ST - used (L) --
1 1B5 / 25S $2.50 Wards Super Airline 120%: diodes 110% / 105% 700 / 575Gm ST - used (L) --
1 1C6 $5.00 National Union 115% / 110% 1250 / 725: 400 / 376Gm ST - NOS (ob) --
1 1C6 $5.00 National Union 115% / 100% 1250 / 725: 400 / 376Gm ST - NOS (ob) --
1 1C6 $5.00 Tung-Sol 110% / 110% 950 / 725: 375 / 375Gm ST - NOS (ob) --
1 1C6 $5.00 Tung-Sol 110% / 130% 1500 / 725: 725 / 375Gm ST - NOS (ob) --
1 1C6 $5.00 Tung-Sol 110% / 110% 1200 / 725: 400 / 375Gm ST - NOS (ob) --
1 1C6 $5.00 Tung-Sol 110% / 110% 1000 / 725: 400 / 375Gm ST - NOS (ob) --
1 1C6 $5.00 Westinghouse 110% / 110% 1200 / 725: 375 / 375Gm ST - NOS (ob) --
1 1C6 $5.00 Philco 120% / 120% 1400 / 725: 375 / 375Gm ST - NOS (wb) cat:402-133
1 1C6 $5.00 Philco 115% / 120% 1500 / 725: 375 / 375Gm ST - NOS (wb) --
1 1C6 $5.00 Ken-Rad 110% / 120% 1100 / 725: 375 / 375Gm ST - NOS (ob) JAN
1 1C6 $3.00 National Union 100% / 120% 950 / 725: 375 / 375Gm ST - used (L) --
1 1C6 $3.00 National Union 110% / 110% 1300 / 725: 375 / 375Gm ST - used (L) engraved base
1 1C6 $3.00 National Union 110% / 110% 1175 / 725: 375 / 375Gm ST - used (L) engraved base
1 1C6 $3.00 Wards Super Airline 120% / 110% 1450 / 725: 400 / 375Gm ST - used (L) engraved base
1 1C6 $3.00 Wards Super Airline 110% / 110% 1100 / 725: 375 / 375Gm ST - used (L) engraved base - cat:312-223
1 1C6 $3.00 Wards Super Airline 110% / 110% 1450 / 725: 425 / 375Gm ST - used (L) engraved base - paint on tube
1 1C6 $3.00 Tung-Sol 100% / 120% 1100 / 725: 375 / 375Gm ST - used (L) --
1 1C6 $3.00 Arcturus 120% / 130% 1450 / 725: 450 / 375Gm ST - used (L) engraved base
1 1C6 $3.00 Philco 110% / 140% 950 / 725: 375 / 375Gm ST - used (rb) --
1 1C6 $2.00 RCA Victor 110% / 90% 110 / 725: 375 / 375Gm ST - used (L) --
1 1C6 $2.00 RCA / Cunningham 110% / 95% 1200 / 725: 375 / 375Gm ST - used (L) engraved base
1 1F6 $5.00 National Union 100% diodes 100% / 150% ST - 850 / 650Gm NOS (ob) --
1 1F6 $5.00 National Union 120% diodes 120% / 140% ST - 800 / 650Gm NOS (ob) --
1 1F6 $5.00 National Union 110% diodes 100% / 140% ST - 850 / 650Gm NOS (ob) damaged box
1 1F6 $5.00 National Union 125% diodes 140% / 140% ST - 800 / 650Gm NOS (ob) --
1 1F6 $5.00 RCA untested heater ok ST - NOS (ob) sealed in box
1 1F6 $5.00 Tung-Sol 130%: diodes 100% / 140% 700 / 650Gm ST - NOS (ob) sealed in box
1 1F6 $3.00 RCA Victor 110%: diodes 140% / 100% ST - 650 / 650Gm used (rb) --
1 1F6 $2.00 Tung-Sol 90%: diodes 100% / 100% 500 / 650Gm ST - used (rb) damaged box
1 1V $2.50 RCA 120% -- ST - used (L) --
1 1V $2.50 National Union 120% -- ST - used (L) --
1 1V $2.50 National Union 110% -- ST - used (L) JAN
1 1V $2.50 Ken-Rad 110% -- ST - used (L) --
1 1V $2.50 Philco 120% -- ST - used (L) --
1 1V $2.50 Tung-Sol 100% -- ST - used (L) engraved base
1 1V $2.00 unknown 110% -- ST - used (L) --
1 2A3 $15.00 GE 40% 650 / 3000Gm ST - used (L) single plate
1 2A3 $15.00 Sylvania 40% 650 / 3000Gm ST - used (L) dual plate
1 2A3 $15.00 Tung-Sol 30% 550 / 3000Gm ST - used (L) dual plate
1 2X2 $3.00 Ken-Rad 120% --- ST - NOS (OB) US Navy
1 2X2 $3.00 Ken-Rad 120% --- ST - NOS (OB) US Navy
1 25B5 $25.00 RCA 140% 1600 / 2000Gm ST - NOS (ob) damaged box
1 25Z5-GT $5.00 GE 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 Westinghouse 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 Sylvania 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 Sylvania 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 Sylvania 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 Sylvania 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 RCA 110 / 110% -- GT - NOS (ob) --
1 25Z5-GT $5.00 RCA 110 / 110% -- GT - NOS (ob) --
1 25Z5 $5.00 National Union 110% / 110% -- ST - NOS (ob) damaged box
1 25Z5 $5.00 National Union 110% / 110% -- ST - NOS (ob) damaged box
1 25Z5 $5.00 National Union 110% / 110% -- ST - NOS (ob) damaged box
1 25Z5 $5.00 Sylvania 110% / 110% -- ST - NOS (ob) --
1 25Z5 $5.00 Sylvania 110% / 110% -- ST - NOS (wb) JAN
1 25Z5 $2.50 RCA / Cunningham 110% / 110% -- ST - used (rb) engraved base
1 25Z5 $2.50 RCA / Cunningham 110% / 110% -- ST - used (wb) engraved base

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