MDB Ventures Radio Loktal 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.


Loktal tubes were designed by Sylvania in 1938 for mobile radio use. The proper name is "Loktal" although the name is sometimes misspelled as "loctal" since "Loktal" doesn't look like the right spelling. The tubes "lock" into the socket via a spring clamp around the locator pin.

Often the tubes will have a black coating on the pins. This is not as bad as it seems. The pins are coated with silver to provide a better contact, but silver oxidizes with age which is the cause of the black color. Silver oxide is still conductive, although not as conductive as unoxidized silver.


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

Desc

Notes
1 7A7 $3.00 Sylvania 130% 2600 / 2000Gm NOS (OB) Loktal - yellow lettering
1 7A7 $3.00 Sylvania 110% 2300 / 2000Gm NOS (OB) Loktal - yellow lettering
1 7A7 $3.00 Sylvania 120% 2500 / 2000Gm NOS (OB) Loktal - green lettering
1 7A7 $3.00 Sylvania 110% 2400 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 120% 2500 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 110% 2500 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 120% 2500 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 110% 2250 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 110% 2600 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 110% 2400 / 2000Gm NOS (OB) Loktal - green lettering - JAN
1 7A7 $3.00 Sylvania 110% 2600 / 2000Gm NOS (OB) Loktal - green lettering - JAN - damaged box
1 7A7 $3.00 Philco 110% 2500 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 130% 2700 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 130% 2600 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 140% 2700 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 130% 2700 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 120% 2500 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 110% 2500 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 120% 2500 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A7 $3.00 Philco 110% 2500 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Raytheon 130% 2600 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Raytheon 140% 2800 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Raytheon 130% 2800 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Raytheon 120% 2300 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Rad-Tel 120% 2600 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Delco 110% 2400 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Delco 120% 2600 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Tung-Sol 120% 2400 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Continental 140% 2500 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 Continental 120% 2600 / 2000Gm NOS (OB) Loktal
1 7A7 $3.00 GE 130% 2800 / 2000Gm NOS (OB) Loktal - white lettering
1 7A7 $3.00 GE 130% 2800 / 2000Gm NOS (OB) Loktal - white lettering
1 7A7 $3.00 GE 130% 2700 / 2000Gm NOS (OB) Loktal - white lettering
1 7A7 $3.00 GE 110% 2500 / 2000Gm NOS (OB) Loktal - white lettering
1 7A7 $3.00 RCA 140% 2600 / 2000Gm NOS (OB) Loktal - red lettering
1 7A7 $3.00 RCA 140% 3000 / 2000Gm NOS (OB) Loktal - red lettering - missing box flap
1 7A7 $3.00 RCA 130% 2900 / 2000Gm NOS (OB) Loktal - red lettering
1 7A7 $3.00 RCA 130% 2800 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A7 $3.00 RCA 130% 2800 / 2000Gm NOS (OB) Loktal - silver lettering - damaged box
1 7A7 $1.00 Sylvania 120% 2500 / 2000Gm used (rb) Loktal - green lettering
1 7A7 $1.00 Zenith 100% 2350 / 2000Gm used (rb) Loktal
1 7A7 $1.00 Zenith 100% 2400 / 2000Gm used (rb) Loktal
1 7A7 $1.00 Zenith 100% 2500 / 2000Gm used (rb) Loktal
1 7A7 $1.00 Philco 120% 2600 / 2000Gm used (rb) Loktal
1 7A7 $1.00 Sylvania 100% 2000 / 2000Gm used (rb) Loktal - white lettering
1 7A7 $0.50 unknown 120% 2500 / 2000Gm used (wb) Loktal
1 7A7 $0.50 unknown 120% 2400 / 2000Gm used (rb) Loktal
1 7A7 $0.50 Sylvania 90% 2200 / 2000Gm used (rb) Loktal - green lettering
1 7A7 $0.50 GM 90% 2100 / 2000Gm used (rb) Loktal
1 7A8 $3.00 Sylvania 120% / 110% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering - JAN
1 7A8 $3.00 Sylvania 110% / 120% 1300 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering - US Navy
1 7A8 $3.00 Sylvania 120% / 130% 1250 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 140% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 130% / 110% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 130% / 130% 1500 / 1000: 700 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 130% / 110% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering - damaged box
1 7A8 $3.00 Sylvania 120% / 130% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 110% / 140% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 130% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 110% 1200 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 130% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 120% 1400 / 1000: 700 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 130% / 110% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 110% / 140% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 130% 1500 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 120% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 110% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 120% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 120% 1600 / 1000: 650 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 140% 1400 / 1000: 700 / 500Gm NOS (OB) Loktal - green lettering
1 7A8 $3.00 Sylvania 120% / 140% 1600 / 1000: 650 / 500Gm NOS (OB) Loktal - yellow lettering
1 7A8 $3.00 Sylvania 110% / 140% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - yellow lettering
1 7A8 $3.00 Sylvania 110% / 130% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal - yellow lettering
1 7A8 $3.00 Philco 100% / 120% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - sealed in box
1 7A8 $3.00 RCA 110% / 130% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - red lettering
1 7A8 $3.00 RCA 110% / 130% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - silver lettering
1 7A8 $3.00 RCA 120% / 120% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - silver lettering
1 7A8 $3.00 RCA 110% / 120% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal - silver lettering
1 7A8 $3.00 RCA 110% / 140% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - silver lettering
1 7A8 $3.00 GE 110% / 140% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - white lettering
1 7A8 $3.00 GE 130% / 130% 1700 / 1000: 700 / 500Gm NOS (OB) Loktal - white lettering
1 7A8 $3.00 GE 110% / 120% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - white lettering
1 7A8 $3.00 GE 110% / 140% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - white lettering
1 7A8 $3.00 GE 120% / 120% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal - white lettering
1 7A8 $3.00 GE 120% / 130% 1400 / 1000: 600 / 500Gm NOS (OB) Loktal - white lettering - torn box flap
1 7A8 $3.00 Wards Airline 120% / 130% 1500 / 1000: 600 / 500Gm NOS (OB) Loktal - torn box flap
1 7A8 $3.00 Raytheon 110% / 110% 1250 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 CBS 120% / 140% 1750 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 CBS 110% / 140% 1600 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 CBS 120% / 140% 1700 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Tung-Sol 120% / 110% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 120% / 120% 1700 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 120% / 130% 1650 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 130% / 120% 1400 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 120% / 120% 1700 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 130% / 120% 1800 / 1000: 650 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 110% / 130% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $3.00 Motorola 110% / 140% 1300 / 1000: 600 / 500Gm NOS (OB) Loktal
1 7A8 $1.00 Motorola 120% / 130% 1600 / 1000: 700 / 500Gm used (rb) Loktal
1 7A8 $1.00 Philco 100% / 130% 1700 / 1000: 650 / 500Gm used (rb) Loktal
1 7A8* $1.00 Philco 120% / 110% 1300 / 1000: 650 / 500Gm used (wb) Loktal
1 7A8 $1.00 Philco 100% / 100% 1300 / 1000: 600 / 500Gm used (rb) Loktal
1 7A8 $1.00 RCA 110% / 110% 1500 / 1000: 600 / 500Gm used (rb) Loktal - silver lettering
1 7A8 $1.00 Sylvania 110% / 130% 1500 / 1000: 650 / 500Gm used (rb) Loktal - yellow lettering
1 7A8 $1.00 Sylvania 110% / 130% 1250 / 1000: 600 / 500Gm used (rb) Loktal - green lettering
1 7A8 $1.00 unknown 110% / 110% 1250 / 1000: 600 / 500Gm used (wb) Loktal
1 7A8 $0.50 Philco 90% / 140% 1300 / 1000: 550 / 500Gm used (rb) Loktal
1 7A8 $0.50 RCA 110% / 90% 1100 / 1000: 600 / 500Gm used (rb) Loktal - silver lettering
1 7A8 $0.50 Sylvania 90% / 120% 1100 / 1000: 600 / 500Gm used (rb) Loktal - green lettering - US Navy
1 7A8 $0.50 unknown 90% / 90% 1100 / 1000: 600 / 500Gm used (rb) Loktal
1 7A8 $0.50 unknown 90% / 130% 1450 / 1000: 650 / 500Gm used (rb) Loktal

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 Loktal Radio 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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or
sales@fourwater.com