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 50A5 $3.00 RCA 120% 6000 / 5900Gm NOS (OB) Loktal - red lettering
1 50A5 $3.00 RCA 120% 6250 / 5900Gm NOS (OB) Loktal - red lettering
1 50A5 $3.00 RCA 120% 6250 / 5900Gm NOS (OB) Loktal - silver lettering
1 50A5 $3.00 RCA 125% 6250 / 5900Gm NOS (OB) Loktal - red lettering
1 50A5 $3.00 RCA 125% 6250 / 5900Gm NOS (OB) Loktal - red lettering
1 50A5 $3.00 RCA 130% 6000 / 5900Gm NOS (OB) Loktal - silver lettering
1 50A5 $3.00 RCA 130% 6500 / 5900Gm NOS (OB) Loktal - silver lettering
1 50A5 $3.00 Raytheon 110% 6000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Raytheon 120% 7000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Raytheon 115% 7000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Raytheon 120% 6750 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Raytheon 120% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Raytheon 120% 7000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 CBS 130% 6250 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 CBS 130% 6000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 CBS 120% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 CBS / Hytron 120% 7000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Philco 120% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Philco 110% 6000 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Tung-Sol 120% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Hoffman 130% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Delco 120% 6500 / 5900Gm NOS (OB) Loktal
1 50A5 $3.00 Delco 120% 6250 / 5900Gm NOS (OB) Loktal - missing box flap
1 50A5 $3.00 GE 130% 7000 / 5900Gm NOS (OB) Loktal - white lettering
1 50A5 $3.00 GE 130% 6500 / 5900Gm NOS (OB) Loktal - white lettering
1 50A5 $3.00 GE 120% 6500 / 5900Gm NOS (OB) Loktal - white lettering
1 50A5 $3.00 GE 110% 6000 / 5900Gm NOS (OB) Loktal - white lettering
1 50A5 $3.00 GE 110% 6250 / 5900Gm NOS (OB) Loktal - white lettering
1 50A5 $3.00 Sylvania 130% 7000 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 130% 6500 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 140% 6250 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 110% 6000 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 130% 6500 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 130% 6500 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 110% 6250 / 5900Gm NOS (OB) Loktal - green lettering
1 50A5 $3.00 Sylvania 130% 6500 / 5900Gm NOS (OB) Loktal - yellow lettering
1 50A5 $3.00 Sylvania 130% 6250 / 5900Gm NOS (OB) Loktal - yellow lettering
1 50A5 $3.00 Sylvania 130% 7000 / 5900Gm NOS (OB) Loktal - yellow lettering
1 50A5 $1.00 Sylvania 130% 6500 / 5900Gm used (rb) Loktal - yellow lettering
1 50A5 $1.00 Sylvania 120% 6250 / 5900Gm used (rb) Loktal - yellow lettering
1 50A5 $1.00 GE 110% 7500 / 5900Gm used (rb) Loktal - white lettering
1 50A5 $1.00 GE 130% 6250 / 5900Gm used (rb) Loktal - white lettering
1 50A5 $1.00 RCA 110% 6500 / 5900Gm used (rb) Loktal - silver lettering
1 50A5 $0.50 Raytheon 110% 7000 / 5900Gm used (rb) Loktal - loose base
1 50A5 $0.50 RCA 100% 6000 / 5900Gm used (rb) Loktal - silver lettering
1 50A5 $0.50 Sylvania 100% 6250 / 5900Gm used (OB) Loktal
1 50A5 $0.50 Philco 100% 6000 / 5900Gm used (OB) Loktal
1 50A5 $0.50 unknown 90% 5750 / 5900Gm used (OB) Loktal
1 50A5 $0.25 Sylvania 130% 6500 / 5900Gm used leaky (2M) (rb) Loktal - yellow lettering
1 50A5 $0.25 GM / Delco 120% 6500 / 5900Gm used leaky (1M) (rb) Loktal
1 50A5 $0.25 unknown 100% 6000 / 5900Gm used (wb) Loktal
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 50X6 $3.00 RCA 120% / 120% --- NOS (OB) Loktal - silver lettering
1 50X6 $3.00 RCA 120% / 120% --- NOS (OB) Loktal - silver lettering
1 50X6 $3.00 RCA 120% / 120% --- NOS (OB) Loktal - red lettering
1 50X6 $3.00 RCA 120% / 120% --- NOS (OB) Loktal - red lettering
1 50X6 $3.00 RCA 110% / 110% --- NOS (OB) Loktal - silver lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 120% / 115% --- NOS (OB) Loktal - white lettering
1 50X6 $3.00 GE 115% / 115% --- NOS (OB) Loktal - white lettering
1 50X6* $3.00 Raytheon 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 115% / 115% --- NOS (OB) Loktal
1 50X6 $3.00 Raytheon 115% / 115% --- NOS (OB) Loktal
1 50X6 $3.00 Hytron 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Tung-Sol 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Tung-Sol 115% / 115% --- NOS (OB) Loktal
1 50X6 $3.00 Tung-Sol 115% / 115% --- NOS (OB) Loktal
1 50X6 $3.00 Tung-Sol 110% / 115% --- NOS (OB) Loktal
1 50X6 $3.00 National Union 120% / 120% --- NOS (OB) Loktal - damaged box
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal
1 50X6 $3.00 Philco 120% / 120% --- NOS (OB) Loktal - torn box flap
1 50X6 $3.00 Philco 115% / 120% --- NOS (OB) Loktal
1 50X6 $1.00 Philco 115% / 115% --- used (rb) Loktal
1 50X6 $1.00 Raytheon 120% / 120% --- used (ob) Loktal
1 50X6 $1.00 unknown 120% / 120% --- 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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