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 7F7 $7.00 Sylvania 130% / 130% 1400: 1400 / 1300Gm NOS (OB) Loktal - JAN - green lettering
1 7F7 $7.00 Tung-Sol 130% / 130% 1400: 1400 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Tung-Sol 140% / 140% 1600: 1600 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Rex Cole untested sealed in box NOS (OB) Loktal
1 7F7 $7.00 Philco 130% / 130% 1300: 1300 / 1300Gm NOS (OB) Loktal - damaged box
1 7F7 $7.00 CBS 140% / 140% 1450: 1550 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 CBS 130% / 140% 1400: 1500 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 CBS 140% / 140% 1400: 1450 / 1300Gm NOS (OB) Loktal - minor rust on base
1 7F7 $7.00 CBS 140% / 140% 1600: 1600 / 1300Gm NOS (OB) Loktal - torn box flap
1 7F7 $7.00 CBS 130% / 130% 1300: 1300 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Westinghouse 140% / 140% 1400: 1450 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Westinghouse 130% / 130% 1350: 1350 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 GE 140% / 140% 1350: 1400 / 1300Gm NOS (OB) Loktal - white lettering
1 7F7 $7.00 GE 140% / 130% 1400: 1350 / 1300Gm NOS (OB) Loktal - white lettering
1 7F7 $7.00 RCA 130% / 130% 1350: 1400 / 1300Gm NOS (OB) Loktal - silver lettering
1 7F7 $7.00 RCA 140% / 140% 1400: 1400 / 1300Gm NOS (OB) Loktal - red lettering
1 7F7 $7.00 Philco 140% / 130% 1300: 1300 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Philco 130% / 140% 1350: 1300 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Philco 130% / 140% 1300: 1350 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Philco 140% / 140% 1400: 1400 / 1300Gm NOS (wb) Loktal
1 7F7 $7.00 Philco 140% / 140% 1400: 1400 / 1300Gm NOS (wb) Loktal
1 7F7 $7.00 Philco 140% / 140% 1400: 1400 / 1300Gm NOS (wb) Loktal
1 7F7 $7.00 Realistic 140% / 140% 1350: 1400 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 M.H.R. Co. untested sealed in box NOS (OB) Loktal
1 7F7 $7.00 Raytheon 130% / 120% 1300: 1300 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Raytheon 130% / 140% 1300: 1400 / 1300Gm NOS (OB) Loktal
1 7F7 $7.00 Raytheon 110% / 120% 1300: 1350 / 1300Gm NOS (OB) Loktal
1 7F7 / VT-189 $4.00 Sylvania 140% / 140% 1350: 1400 / 1300Gm used (rb) Loktal - green lettering
1 7F7 / VT-189 $4.00 Sylvania 120% / 110% 1300: 1200 / 1300Gm used (rb) Loktal - JAN - green lettering
1 7F7 / VT-189 $4.00 Sylvania 130% / 130% 1300: 1300 / 1300Gm used (rb) Loktal - JAN - green lettering
1 7F7 / VT-189 $4.00 Sylvania 130% / 140% 1450: 1500 / 1300Gm used (rb) Loktal - JAN - green lettering
1 7F7 / VT-189 $4.00 Sylvania 120% / 120% 1300: 1300 / 1300Gm used (rb) Loktal - JAN - green lettering
1 7F7 / VT-189 $4.00 GE 130% / 120% 1400: 1300 / 1300Gm used (rb) Loktal - yellow lettering
1 7F7 $4.00 Sylvania 130% / 130% 1400: 1400 / 1300Gm used (wb) Loktal - green lettering
1 7F7 $4.00 Sylvania 120% / 120% 1300: 1300 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 110% / 120% 1300: 1350 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 115% / 120% 1200: 1250 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 130% / 130% 1400: 1400 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 120% / 130% 1300: 1350 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 140% / 130% 1600: 1450 / 1300Gm used (wb) Loktal - green lettering
1 7F7 $4.00 Sylvania 140% / 130% 1400: 1400 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 140% / 130% 1400: 1350 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Sylvania 120% / 130% 1300: 1400 / 1300Gm used (rb) Loktal - green lettering
1 7F7 $4.00 Philco 110% / 120% 1100: 1120 / 1300Gm used (rb) Loktal
1 7F7 $4.00 RCA 120% / 110% 1400: 1300 / 1300Gm used (rb) Loktal - silver lettering
1 7F7 $4.00 RCA 120% / 120% 1300: 1300 / 1300Gm used (rb) Loktal - silver lettering
1 7F7 $4.00 Raytheon 140% / 140% 1500: 1550 / 1300Gm used (rb) Loktal
1 7F7 $4.00 GM 140% / 120% 1400: 1200 / 1300Gm used (rb) Loktal
1 7F7 $4.00 Delco 120% / 110% 1300: 1200 / 1300Gm used (rb) Loktal
1 7F7 $3.00 unknown 140% / 140% 1400: 1600 / 1300Gm used (rb) Loktal
1 7F7 $2.00 Zenith 110% / 100% 1200: 1100 / 1300Gm used (rb) Loktal
1 7F7 $1.00 Westinghouse 90% / 100% 900: 1100 / 1300Gm used (rb) Loktal
1 7F7 $1.00 Zenith 90% / 90% 900: 1000 / 1300Gm used (rb) Loktal
1 7F7 $1.00 Raytheon 90% / 90% 1000: 1000 / 1300Gm used (rb) Loktal
1 7F7 $1.00 unknown 90% / 110% 1200: 1300 / 1300Gm used (rb) Loktal
1 7F8W $10.00 Sylvania 130% / 140% 4500: 4500 / 4000Gm NOS (OB) Loktal - JAN - green lettering
1 7F8W $10.00 Sylvania 130% / 140% 4500: 4800 / 4000Gm NOS (OB) Loktal - JAN - green lettering
1 7F8W $10.00 Sylvania 120% / 140% 4300: 5000 / 4000Gm NOS (OB) Loktal - JAN - green lettering
1 7F8 $8.00 Sylvania 110% / 110% 4000: 4000 / 4000Gm NOS (OB) Loktal - green lettering
1 7F8 $8.00 Sylvania 140% / 140% 4400: 4400 / 4000Gm NOS (OB) Loktal - green lettering
1 7F8 $8.00 Sylvania 130% / 140% 4800: 5200 / 4000Gm NOS (OB) Loktal - green lettering
1 7F8 $8.00 Sylvania 120% / 130% 4000: 4500 / 4000Gm NOS (OB) Loktal - green lettering
1 7F8 $8.00 Sylvania 120% / 130% 4500: 4600 / 4000Gm NOS (OB) Loktal - green lettering
1 7F8 $8.00 Sylvania 140% / 140% 4300: 4400 / 4000Gm NOS (wb) Loktal - green lettering
1 7F8 $8.00 Sylvania 120% / 110% 4800: 4200 / 4000Gm NOS (OB) Loktal - green lettering - JAN - damaged box
1 7F8 $8.00 Sylvania 140% / 130% 4500: 4400 / 4000Gm NOS (OB) Loktal - yellow lettering
1 7F8 $8.00 Sylvania 110% / 140% 4300: 5000 / 4000Gm NOS (OB) Loktal - yellow lettering
1 7F8 $8.00 Sylvania untested sealed in box NOS (OB) Loktal
1 7F8 $8.00 RCA 120% / 120% 4300: 4300 / 4000Gm NOS (OB) Loktal - silver lettering
1 7F8 $8.00 RCA 130% / 120% 4300: 4100 / 4000Gm NOS (OB) Loktal - silver lettering
1 7F8 $8.00 RCA 140% / 120% 4800: 4100 / 4000Gm NOS (OB) Loktal - silver lettering
1 7F8 $8.00 RCA 130% / 140% 4200: 5200 / 4000Gm NOS (OB) Loktal - silver lettering
1 7F8 $8.00 RCA 120% / 120% 4100: 4200 / 4000Gm NOS (OB) Loktal - red lettering
1 7F8 $8.00 CBS 140% / 140% 4500: 4600 / 4000Gm NOS (OB) Loktal
1 7F8 $8.00 Raytheon 110% / 130% 4000: 5000 / 4000Gm NOS (OB) Loktal - damaged box
1 7F8 $8.00 GE 140% / 140% 4600: 4400 / 4000Gm NOS (OB) Loktal - white lettering
1 7F8 $4.00 Sylvania 120% / 110% 3800: 3600 / 4000Gm used (wb) Loktal - green lettering
1 7F8 $4.00 Sylvania 130% / 120% 4300: 4100 / 4000Gm used (rb) Loktal - green lettering
1 7F8 $4.00 Philco 110% / 120% 3600: 4200 / 4000Gm used (rb) Loktal
1 7F8 $4.00 Philco 120% / 130% 3800: 4000 / 4000Gm used (rb) Loktal
1 7F8 $4.00 RCA 120% / 110% 4000: 3800 / 4000Gm used (rb) Loktal - silver lettering
1 7F8 $4.00 RCA 110% / 130% 3800: 4500 / 4000Gm used (ob) Loktal - silver lettering
1 7F8 $4.00 Tung-Sol 110% / 140% 3800: 5000 / 4000Gm used (ob) Loktal
1 7G7 / 1232 $6.00 Raytheon 110% 2200 / 2000Gm NOS (OB) Loktal
1 7G7 $5.00 Sylvania 130% 3600 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 Sylvania 120% 2700 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 Sylvania 120% 3500 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 Sylvania 130% 3500 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 Sylvania 120% 3400 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 Sylvania 110% 2600 / 2000Gm NOS (OB) Loktal - green lettering
1 7G7 $5.00 RCA 130% 3100 / 2000Gm NOS (OB) Loktal - silver lettering
1 7G7 $5.00 RCA 110% 3200 / 2000Gm NOS (OB) Loktal - silver lettering
1 7G7 $5.00 RCA 110% 3200 / 2000Gm NOS (OB) Loktal - red lettering
1 7G7 $5.00 GE 110% 2800 / 2000Gm NOS (OB) Loktal - white lettering
1 7G7 $5.00 Philco 120% 3200 / 2000Gm NOS (OB) Loktal
1 7G7 $5.00 Philco 110% 2800 / 2000Gm NOS (OB) Loktal - torn box flap
1 7G7 $5.00 Philco 120% 3400 / 2000Gm NOS (OB) Loktal
1 7G7 $5.00 Philco 110% 3200 / 2000Gm NOS (OB) Loktal
1 7G7 $5.00 Raytheon 120% 3400 / 2000Gm NOS (wb) Loktal
1 7G7 $2.00 Ken-Rad 100% 3200 / 2000Gm used (rb) Loktal
1 7G8 / 1206 $5.00 Sylvania 120% / 120% 2600: 2700 / 2100Gm NOS (OB) Loktal - green lettering - damaged box
1 7G8 / 1206 $5.00 Sylvania 120% / 110% 2500: 2700 / 2100Gm NOS (OB) Loktal - green lettering

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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