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 7B8 $3.00 RCA 120% / 130% 1700 / 1000: 1100 / 500Gm NOS (OB) Loktal - silver lettering
1 7B8 $3.00 RCA 130% / 130% 1200 / 1000: 800 / 500Gm NOS (OB) Loktal - red lettering
1 7B8 $3.00 RCA Victor 130% / 130% 1800 / 1000: 1100 / 500Gm NOS (OB) Loktal - missing box flap
1 7B8 $3.00 Raytheon 130% / 130% 1700 / 1000: 1100 / 500Gm NOS (OB) Loktal
1 7B8 $3.00 Tung-Sol 110% / 130% 1600 / 1000: 1100 / 500Gm NOS (OB) Loktal
1 7B8 $3.00 GE 120% / 120% 1500 / 1000: 1000 / 500Gm NOS (OB) Loktal - white lettering
1 7B8 $3.00 Hytron untested sealed in box NOS (OB) Loktal - Bantam Tube
1 7B8 $3.00 Philco 110% / 110% 1500 / 1000: 1100 / 500Gm NOS (OB) Loktal
1 7B8 $3.00 Sylvania 120% / 130% 1700 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 140% / 140% 1600 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 130% / 120% 1500 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 140% / 140% 1400 / 1000: 1000 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 120% 1500 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 120% 1600 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 140% 1300 / 1000: 1000 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 130% 1600 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering - damaged box
1 7B8 $3.00 Sylvania 110% / 140% 1700 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 130% 1800 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 130% 1700 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 140% 1800 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 120% 1700 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 130% 1700 / 1000: 1200 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 140% 1700 / 1000: 1000 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 120% / 130% 1700 / 1000: 1100 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 110% / 140% 1600 / 1000: 1300 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 140% / 120% 1600 / 1000: 1000 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 130% / 140% 1400 / 1000: 1000 / 500Gm NOS (OB) Loktal - green lettering
1 7B8 $3.00 Sylvania 130% / 130% 1800 / 1000: 1200 / 500Gm NOS (OB) Loktal - yellow lettering
1 7B8 $3.00 Sylvania 140% / 120% 1700 / 1000: 1100 / 500Gm NOS (OB) Loktal - yellow lettering
1 7B8 $1.50 Sylvania 120% / 130% 2000 / 1000: 1300 / 500Gm used (rb) Loktal - green lettering
1 7B8 $1.50 National Union 110% / 120% 1400 / 1000: 1000 / 500Gm used (rb) Loktal
1 7B8 $1.50 Philco 110% / 130% 1700 / 1000: 1200 / 500Gm used (rb) Loktal
1 7B8 $1.50 Philco 120% / 110% 1400 / 1000: 1100 / 500Gm used (rb) Loktal
1 7B8 $1.00 Raytheon 100% / 120% 1200 / 1000: 1000 / 500Gm used (rb) Loktal
1 7B8 $1.00 Philco 100% / 100% 1200 / 1000: 900 / 500Gm used (rb) Loktal
1 VT-243 / 7C4 / 1203A $3.00 Philco untested sealed in box NOS (OB) Loktal - US Army
1 VT-243 / 7C4 / 1203A $3.00 Philco untested selaed in box NOS (OB) Loktal - US Army
1 7C4 $3.00 GE 110% --- NOS (OB) Loktal - white lettering
1 7C4 $3.00 GE 110% --- NOS (OB) Loktal - white lettering
1 7C4 / 1203 $3.00 Tung-Sol 110% --- NOS (OB) Loktal - damaged box
1 7C4 / 1203 $3.00 Tung-Sol 120% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 Sylvania 110% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 110% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 120% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 120% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 110% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 110% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 120% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Sylvania 120% --- NOS (OB) Loktal - green lettering
1 7C4 / 1203A $3.00 Raytheon 110% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 Raytheon 110% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 Raytheon 120% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 Philco 120% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 National Union 120% --- NOS (OB) Loktal
1 7C4 / 1203A $3.00 National Union 110% --- NOS (OB) Loktal
1 1203A $3.00 National Union untested sealed in box NOS (OB) Loktal
1 1203A $3.00 National Union untested sealed in box NOS (OB) Loktal
1 7C4 / 1203A $1.50 Raytheon 120% --- used (OB) 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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sales@mdbventures.com
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