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 7E6 $3.00 Philco 120% diodes 120% / 120% 2000 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 Philco 120% diodes 120% / 120% 2100 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 GE 110% diodes 120% / 120% 2000 / 1900Gm NOS (OB) Loktal - sealed in box
1 7E6 $3.00 GE 120% diodes 110% / 120% 2000 / 1900Gm NOS (OB) Loktal - white lettering - missing box flap
1 7E6 $3.00 Sylvania 130% diodes 110% / 120% 2000 / 1900Gm NOS (OB) Loktal - green lettering
1 7E6 $3.00 RCA 120% diodes 110% / 110% 2100 / 1900Gm NOS (OB) Loktal - sealed in box
1 7E6 $3.00 Arcturus 140% diodes 120% / 110% 2400 / 1900Gm NOS (OB) Loktal - water damaged box
1 7E6 $3.00 Arcturus 140% diodes 120% / 120% 2400 / 1900Gm NOS (OB) Loktal - minor corrosion on base
1 7E6 $3.00 Emerson 120% diodes 110% / 120% 2100 / 1900Gm NOS (OB) Loktal - torn box flap
1 7E6 $3.00 Sylvania untested sealed in box NOS (OB) Loktal
1 7E6 $3.00 GM / Delco 120% diodes 110% / 120% 2000 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 Raytheon 120% diodes 120% / 120% 2000 / 1900Gm NOS (OB) Loktal - US Navy
1 7E6 $3.00 Raytheon 130% diodes 120% / 110% 2000 / 1900Gm NOS (OB) Loktal - sealed in box
1 7E6 $3.00 Raytheon 110% diodes 110% / 110% 2200 / 1900Gm NOS (OB) Loktal - US Navy
1 7E6 $3.00 Raytheon 100% diodes 130% / 110% 2000 / 1900Gm NOS (OB) Loktal - sealed in box
1 7E6 $3.00 National Union 120% diodes 120% / 120% 2000 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 National Union 130% diodes 110% / 120% 2000 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 National Union 130% diodes 120% / 120% 2200 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 National Union 130% diodes 120% / 120% 2100 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 National Union 130% diodes 120% / 120% 2100 / 1900Gm NOS (OB) Loktal
1 7E6 $3.00 Sylvania untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 Sylvania for GE untested sealed in box NOS (OB) Loktal
1 7E6 / VT-188 $3.00 GE 130% diodes 110% / 110% 2100 / 1900Gm NOS (OB) Loktal - yellow lettering
1 7E6 / VT-188 $1.50 Raytheon 110% diodes 120% / 120% 1500 / 1900Gm used (rb) Loktal
1 7E6 / VT-188 $1.50 GE 120% diodes 110% / 120% 2100 / 1900Gm used (ob) Loktal - yellow lettering
1 7E6 / VT-188 $1.50 GE 130% diodes 120% / 120% 2000 / 1900Gm used (ob) Loktal - orange lettering
1 7E6 $1.50 GM 130% diodes 110% / 110% 2100 / 1900Gm used (rb) Loktal
1 7E6 / VT-188 $1.00 GE 100% diodes 110% / 110% 1500 / 1900Gm used (rb) Loktal - orange lettering
1 7E7 $2.00 RCA 120% diodes 110% / 120% 1600 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 120% diodes 110% / 120% 1500 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 120% diodes 120% / 120% 1600 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 110% diodes 110% / 120% 1600 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 110% diodes 110% / 120% 1600 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 110% diodes 110% / 120% 1500 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 120% diodes 120% / 110% 1700 / 1300Gm NOS (OB) Loktal - red lettering
1 7E7 $2.00 RCA 120% diodes 110% / 120% 1600 / 1300Gm NOS (OB) Loktal - silver lettering
1 7E7 $2.00 RCA 120% diodes 110% / 110% 1700 / 1300Gm NOS (OB) Loktal - silver lettering - damaged box
1 7E7 $1.00 RCA 110% diodes 120% / 120% 1500 / 1300Gm NOS (OB) Loktal - silver lettering -damaged box - minor corrosion on box
1 7E7 $2.00 Sylvania 110% diodes 110% / 120% 1500 / 1300Gm NOS (OB) Loktal - green lettering
1 7E7 $2.00 Sylvania 110% diodes 110% / 110% 1400 / 1300Gm NOS (OB) Loktal - green lettering
1 7E7 $2.00 Sylvania 120% diodes 110% / 110% 1600 / 1300Gm NOS (OB) Loktal - sealed in box
1 7E7 $2.00 Sylvania 110% diodes 110% / 110% 1400 / 1300Gm NOS (OB) Loktal - green lettering
1 7E7 $2.00 Sylvania 110% diodes 120% / 110% 1700 / 1300Gm NOS (OB) Loktal - green lettering
1 7E7 $2.00 Sylvania 120% diodes 120% / 120% 1700 / 1300Gm NOS (OB) Loktal - green lettering
1 7E7 $2.00 National Union 110% diodes 110% / 110% 1600 / 1300Gm NOS (OB) Loktal
1 7E7 $2.00 National Union 120% diodes 110% / 110% 1600 / 1300Gm NOS (OB) Loktal - torn box flap
1 7E7 $2.00 National Union 120% diodes 110% / 110% 1500 / 1300Gm NOS (OB) Loktal
1 7E7 $2.00 National Union untested sealed in box NOS (OB) Loktal
1 7E7 $2.00 Tung-Sol 110% diodes 110% / 110% 1700 / 1300Gm NOS (OB) Loktal
1 7E7 $2.00 Delco 110% diodes 120% / 120% 1700 / 1300Gm NOS (OB) Loktal
1 7E7 $2.00 Raytheon 110% diodes 120% / 120% 1600 / 1300Gm NOS (OB) Loktal - torn box flap
1 7E7 $2.00 Raytheon 120% diodes 110% / 120% 1500 / 1300Gm NOS (OB) Loktal - sealed in box
1 7E7 $2.00 Raytheon 120% diodes 110% / 120% 1600 / 1300Gm NOS (OB) Loktal - sealed in box
1 7E7 $0.50 Raytheon 100% diodes 110% / 110% 1600 / 1300Gm used (ob) Loktal - torn box flap
1 7E7 $0.50 RCA 100% diodes 120% / 120% 1600 / 1300Gm used (ob) Loktal - silver lettering
1 7E7 $0.50 Silvertone 90% diodes 110% / 120% 1300 / 1300Gm used (rb) Loktal
1 7E7 $0.50 GM 90% diodes 110% / 110% 1400 / 1300Gm used (rb) Loktal
1 7E7 $0.50 unknown 120% diodes 110% / 120% 1450 / 1300Gm used (rb) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE by Sylvania untested sealed in box NOS (OB) Loktal
1 7H7 / VT-190 $4.00 GE by Sylvania untested sealed in box NOS (OB) Loktal
1 7H7 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 $4.00 GE untested sealed in box NOS (OB) Loktal
1 7H7 $4.00 Sylvania 120% 4800 / 3000Gm NOS (OB) Loktal - green lettering - JAN
1 7H7 $4.00 Sylvania 120% 4200 / 3000Gm NOS (OB) Loktal - green lettering - JAN
1 7H7 $4.00 Sylvania 120% 4800 / 3000Gm NOS (OB) Loktal - green lettering - JAN
1 7H7 $4.00 Sylvania 120% 4400 / 3000Gm NOS (OB) Loktal - green lettering
1 7H7 $4.00 Sylvania 120% 4500 / 3000Gm NOS (OB) Loktal - green lettering
1 7H7 $4.00 Sylvania 110% 3800 / 3000Gm NOS (OB) Loktal - green lettering
1 7H7 $4.00 GE 110% 4200 / 3000Gm NOS (OB) Loktal - white lettering
1 7H7 $4.00 GE 110% 4200 / 3000Gm NOS (OB) Loktal - white lettering
1 7H7 $4.00 GE 120% 5200 / 3000Gm NOS (OB) Loktal - white lettering
1 7H7 $4.00 Westinghouse 110% 4800 / 3000Gm NOS (OB) Loktal
1 7H7 $4.00 Philco 110% 3400 / 3000Gm NOS (OB) Loktal
1 7H7 $4.00 Raytheon 110% 3800 / 3000Gm NOS (OB) Loktal - sealed in box
1 7H7 $4.00 Raytheon 110% 4200 / 3000Gm NOS (OB) Loktal - sealed in box
1 7H7 $4.00 Raytheon 110% 4000 / 3000Gm NOS (OB) Loktal - damged box
1 7H7 $4.00 RCA 120% 4800 / 3000Gm NOS (OB) Loktal - silver lettering
1 7H7 $4.00 RCA 110% 4400 / 3000Gm NOS (OB) Loktal - silver lettering
1 7H7 $4.00 RCA 110% 4600 / 3000Gm NOS (OB) Loktal - silver lettering
1 7H7 $3.00 Sylvania 100% 3800 / 3000Gm NOS (OB) Loktal - green lettering
1 7H7 $3.00 Hytron 100% 3200 / 3000Gm NOS (OB) Loktal
1 7H7 $3.00 National Union 100% 3800 / 3000Gm NOS (OB) Loktal
1 7H7 $3.00 RCA 100% 4200 / 3000Gm NOS (OB) Loktal - silver lettering
1 7H7 $3.00 RCA 100% 4000 / 3000Gm NOS (OB) Loktal - silver lettering
1 7H7 $2.00 Philco 130% 4800 / 3000Gm used (rb) Loktal
1 7H7 $2.00 Sylvania 110% 4500 / 3000Gm used (rb) Loktal - yellow lettering
1 7H7 $2.00 Sylvania 120% 4600 / 3000Gm used (rb) Loktal - green lettering
1 7H7 $1.00 Sylvania 100% 4200 / 3000Gm used (rb) Loktal - green lettering
1 7H7 $1.00 GE 100% 3400 / 3000Gm used (rb) Loktal - orange lettering
1 7H7 $1.00 GE 100% 3400 / 3000Gm used (rb) Loktal - white lettering
1 7H7 / VT-190 $0.50 GE 90% 3800 / 3000Gm used (rb) Loktal - orange lettering
1 7H7 $0.50 Sylvania 90% 2400 / 3000Gm used (rb) Loktal - green lettering
1 7H7 $0.50 Sylvania 90% 3000 / 3000Gm used (rb) Loktal - green lettering
1 7H7 $0.50 RCA 90% 3200 / 3000Gm used (rb) Loktal - silver lettering
1 7H7 $0.50 unknown 90% 2500 / 3000Gm used (rb) Loktal
1 7J7 $4.00 Sylvania 140% / 140% 1300 / 800: 2200 / 1000Gm NOS (OB) Loktal - green lettering
1 7J7 $4.00 Sylvania 110% / 140% 1000 / 800: 1600 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 Sylvania 140% / 110% 1200 / 800: 1500 / 1000Gm NOS (OB) Loktal - yellow lettering
1 7J7 $4.00 Sylvania 120% / 110% 1100 / 800: 1500 / 1000Gm NOS (OB) Loktal - green lettering
1 7J7 $4.00 RCA 130% / 130% 1200 / 800: 1800 / 1000Gm NOS (OB) Loktal - silver lettering
1 7J7 $4.00 RCA 130% / 130% 1000 / 800: 1800 / 1000Gm NOS (OB) Loktal - silver lettering - damaged box
1 7J7 $4.00 RCA 140% / 120% 1200 / 800: 1800 / 1000Gm NOS (OB) Loktal - silver lettering
1 7J7 $4.00 RCA 140% / 100% 1300 / 800: 1500 / 1000Gm NOS (OB) Loktal - red lettering
1 7J7 $4.00 RCA 110% / 120% 900 / 800: 1400 / 1000Gm NOS (OB) Loktal - silver lettering
1 7J7 $4.00 Tung-Sol 140% / 120% 1200 / 800: 1700 / 1000Gm NOS (OB) Loktal
1 7J7 $4.00 Raytheon 130% / 140% 1200 / 800: 1900 / 1000Gm NOS (OB) Loktal
1 7J7 $4.00 Raytheon 130% / 120% 1000 / 800: 1500 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 National Union 130% / 140% 1200 / 800: 1900 / 1000Gm NOS (OB) Loktal
1 7J7 $4.00 National Union 130% / 120% 1200 / 800: 1700 / 1000Gm NOS (OB) Loktal
1 7J7 $4.00 Ken-Rad 130% / 120% 1100 / 800: 1600 / 1000Gm NOS (OB) Loktal
1 7J7 $4.00 Ken-Rad 140% / 120% 1200 / 800: 1500 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 Ken-Rad 140% / 130% 1200 / 800: 1900 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 Ken-Rad 140% / 120% 1000 / 800: 1200 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 Ken-Rad 140% / 110% 1100 / 800: 1300 / 1000Gm NOS (OB) Loktal - sealed in box
1 7J7 $4.00 Philco 120% / 140% 900 / 800: 1900 / 1000Gm NOS (OB) Loktal - sealed in box - minor rust on base
1 7J7 $2.00 Ken-Rad 120% / 120% 1100 / 800: 1400 / 1000Gm used (ob) Loktal
1 7J7 $2.00 RCA 110% / 140% 1000 / 800: 2000 / 1000Gm NOS (OB) Loktal - silver lettering
1 7S7 $4.00 Sylvania 130% / 120% 2000 / 800: 1800 / 1000Gm NOS (OB) Loktal - green lettering - JAN
1 7S7 $4.00 Sylvania 120% / 120% 2100 / 800: 1700 / 1000Gm NOS (wb) Loktal - green lettering
1 7S7 $4.00 RCA 130% / 130% 2000 / 800: 1800 / 1000Gm NOS (OB) Loktal - silver lettering
1 7S7 $4.00 GE 130% / 110% 1700 / 800: 1300 / 1000Gm NOS (OB) Loktal - white lettering
1 7S7 $4.00 GE 140% / 110% 2300 / 800: 1600 / 1000Gm NOS (OB) Loktal - white lettering
1 7S7 $4.00 Cunningham 140% / 110% 1900 / 800: 1600 / 1000Gm NOS (OB) Loktal
1 7S7 $4.00 RCA Victor 110% / 120% 1700 / 800: 1600 / 1000Gm NOS (OB) Loktal
1 7S7 $4.00 National Union 140% / 120% 2100 / 800: 2300 / 1000Gm NOS (OB) Loktal
1 7S7 $4.00 National Union 140% / 120% 2000 / 800: 1600 / 1000Gm NOS (OB) Loktal
1 7S7 $4.00 National Union 140% / 140% 2100 / 800: 1900 / 1000Gm NOS (OB) Loktal
1 7S7 $2.00 Sylvania 120% / 110% 1100 / 800: 1000 / 1000Gm USED (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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