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 7Q7 $2.00 Sylvania 120% / 120% 1100 / 500: 1600 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 120% 1200 / 500: 1500 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 130% / 120% 1000 / 500: 1800 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 130% / 110% 900 / 500: 1600 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 110% 900 / 500: 1700 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 120% 900 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 140% 1400 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 130% / 120% 1300 / 500: 1800 / 800Gm NOS (OB) Loktal - green lettering - damaged box
1 7Q7 $2.00 Sylvania 130% / 120% 800 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 140% / 130% 1200 / 500: 1700 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 140% / 140% 1200 / 500: 1700 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 120% 1000 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 120% / 120% 1100 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 130% / 130% 900 / 500: 1500 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 130% / 110% 800 / 500: 1400 / 800Gm NOS (OB) Loktal - green lettering
1 7Q7 $2.00 Sylvania 140% / 130% 1400 / 500: 1300 / 800Gm NOS (OB) Loktal - green lettering - missing box flap
1 7Q7 $2.00 Sylvania 130% / 110% 800 / 500: 1900 / 800Gm NOS (OB) Loktal - yellow lettering
1 7Q7 $2.00 Natioanl Union 120% / 110% 900 / 500: 1700 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Hytron 120% / 120% 1100 / 500: 1200 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Dumont 140% / 130% 1300 / 500: 1700 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 RCA 110% / 110% 1000 / 500: 1500 / 800Gm NOS (OB) Loktal - red lettering
1 7Q7 $2.00 RCA 130% / 130% 1100 / 500: 1400 / 800Gm NOS (OB) Loktal - red lettering
1 7Q7 $2.00 Raytheon 140% / 130% 1200 / 500: 1400 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Raytheon 120% / 120% 1100 / 500: 1500 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Delco 110% / 110% 800 / 500: 1500 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Delco 140% / 140% 1100 / 500: 1400 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Delco 140% / 120% 1100 / 500: 1700 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Tung-Sol 120% / 110% 800 / 500: 1800 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 Tung-Sol 120% / 130% 1300 / 500: 1500 / 800Gm NOS (OB) Loktal
1 7Q7 $2.00 GE 130% / 110% 900 / 500: 1800 / 800Gm NOS (OB) Loktal - white lettering - damaged box
1 7Q7 $2.00 GE 110% / 120% 800 / 500: 1200 / 800Gm NOS (OB) Loktal - white lettering
1 7Q7 $2.00 Westinghouse 110% / 110% 800 / 500: 1400 / 800Gm NOS (OB) Loktal
1 7Q7 $1.00 Delco 110% / 130% 1100 / 500: 1300 / 800Gm NOS (OB) Loktal - minor corrosion on base
1 7Q7 $1.00 Delco 110% / 110% 800 / 500: 1400 / 800Gm NOS (OB) Loktal - minor corrosion on base
1 7Q7 $1.00 GE 130% / 130% 1400 / 500: 1700 / 800Gm used (rb) Loktal - orange lettering
1 7Q7 $1.00 GE 110% / 120% 1200 / 500: 1200 / 800Gm used (rb) Loktal - white lettering
1 7Q7 $1.00 GE 120% / 120% 1000 / 500: 1500 / 800Gm used (rb) Loktal - white lettering
1 7Q7 $1.00 Sylvania 140% / 140% 1500 / 500: 1500 / 800Gm used (rb) Loktal - green lettering - JAN
1 7Q7 $1.00 RCA 120% / 100% 800 / 500: 1600 / 800Gm used (rb) Loktal - silver lettering
1 7Q7 $1.00 RCA 130% / 130% 1100 / 500: 1400 / 800Gm used (rb) Loktal - silver lettering
1 7Q7 $1.00 GM 130% / 120% 1000 / 500: 1500 / 800Gm used (rb) Loktal
1 7R7 $3.00 Sylvania 130% diodes: 110% / 110% 3200 / 2500Gm NOS (OB) Loktal - green lettering - US Navy - US Army
1 7R7 $3.00 Sylvania 130% diodes: 110% / 110% 3100 / 2500Gm NOS (OB) Loktal - green lettering - US Navy - US Army
1 7R7 $3.00 Sylvania 140% diodes: 120% / 110% 3600 / 2500Gm NOS (OB) Loktal - green lettering - US Navy - US Army
1 7R7 $3.00 Sylvania 120% diodes: 110% / 110% 2800 / 2500Gm NOS (OB) Loktal - green lettering - US Navy - US Army
1 7R7 $3.00 GE 130% diodes: 110% / 120% 3000 / 2500Gm NOS (OB) Loktal - white lettering
1 7R7 $3.00 GE 140% diodes: 110% / 110% 3800 / 2500Gm NOS (OB) Loktal - white lettering
1 7R7 $3.00 GE 140% diodes: 120% / 110% 3400 / 2500Gm NOS (OB) Loktal - white lettering
1 7R7 $3.00 GE 120% diodes: 110% / 120% 3000 / 2500Gm NOS (OB) Loktal - white lettering
1 7R7 $3.00 GE 130% diodes: 110% / 110% 3100 / 2500Gm NOS (OB) Loktal - white lettering - damaged box
1 7R7 $3.00 Sylvania 110% diodes: 110% / 120% 3000 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7 $3.00 Sylvania 130% diodes: 120% / 120% 2900 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7 $3.00 Sylvania 130% diodes: 110% / 120% 3200 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7 $3.00 Sylvania 120% diodes: 120% / 110% 3000 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7 $3.00 Sylvania 120% diodes: 110% / 120% 2800 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7 $3.00 Sylvania 110% diodes: 120% / 120% 3000 / 2500Gm NOS (OB) Loktal - green lettering
1 7R7* $3.00 Sylvania 130% diodes: 110% / 110% 3200 / 2500Gm NOS (OB) Loktal - yellow lettering
1 7R7 $3.00 RCA 120% diodes: 110% / 110% 3000 / 2500Gm NOS (OB) Loktal - red lettering
1 7R7 $3.00 RCA 120% diodes: 110% / 120% 3000 / 2500Gm NOS (OB) Loktal - red lettering
1 7R7 $3.00 Delco 130% diodes: 110% / 110% 3200 / 2500Gm NOS (OB) Loktal
1 7R7 $3.00 Emerson 120% diodes: 110% / 120% 3000 / 2500Gm NOS (OB) Loktal
1 7R7 $3.00 Philco 130% diodes: 110% / 110% 3400 / 2500Gm NOS (OB) Loktal
1 7R7 $3.00 Raytheon 140% diodes: 110% / 110% 3400 / 2500Gm NOS (OB) Loktal
1 7R7 $3.00 Raytheon 120% diodes: 110% / 120% 3200 / 2500Gm NOS (OB) Loktal
1 7R7 $3.00 Sylvania 140% diodes: 110% / 110% 3600 / 2500Gm NOS (OB) Loktal
1 7R7 $1.00 Sylvania 130% diodes: 100% / 110% 2800 / 2500Gm used (OB) Loktal - green lettering - US Navy - US Army
1 7R7 $1.00 Sylvania 110% diodes: 110% / 110% 2800 / 2500Gm used (OB) Loktal - green lettering
1 7R7 $1.00 Sylvania 120% diodes: 110% / 110% 3000 / 2500Gm used (OB) Loktal - green lettering
1 7R7 $1.00 GE 130% diodes: 90% / 110% 3000 / 2500Gm used (OB) Loktal - white lettering
1 7R7 $1.00 RCA 130% diodes: 110% / 110% 3200 / 2500Gm used (rb) Loktal - silver lettering
1 7R7 $1.00 Philco 110% diodes: 110% / 110% 2300 / 2500Gm used (OB) Loktal
1 7R7 $1.00 Silvertone 130% diodes: 110% / 120% 3400 / 2500Gm used (rb) Loktal
1 7T7 $5.00 GE 130% 3800 / 2500Gm NOS (OB) Loktal - white lettering - torn box flap
1 7T7 $3.00 GE 120% 2800 / 2500Gm used (rb) Loktal - orange lettering
1 1231 $3.00 Hytron untested sealed in box NOS (OB) Loktal - Bantam tube
1 1231 $2.00 Ken-Rad 140% 3900 / 2450Gm used (wb) Loktal
1 7V7 $3.00 Sylvania 140% 4200 / 2450Gm NOS (OB) Loktal - green lettering
1 7V7 $3.00 Sylvania 140% 4000 / 2450Gm NOS (OB) Loktal - green lettering
1 7V7 $3.00 Sylvania 120% 3200 / 2450Gm NOS (OB) Loktal - green lettering - water damaged box
1 7V7 $3.00 Sylvania 140% 4200 / 2450Gm NOS (OB) Loktal - green lettering
1 7V7 $3.00 Sylvania 130% 3100 / 2450Gm NOS (OB) Loktal - green lettering
1 7V7 $3.00 Sylvania 140% 3400 / 2450Gm NOS (OB) Loktal - green lettering - missing box flap
1 7V7 $3.00 Sylvania 150% 3400 / 2450Gm NOS (OB) Loktal - green lettering
1 7V7 $3.00 Sylvania 120% 3700 / 2450Gm NOS (OB) Loktal - yellow lettering
1 7V7 $3.00 Sylvania 130% 4000 / 2450Gm NOS (OB) Loktal - yellow lettering
1 7V7 $3.00 GE 140% 3200 / 2450Gm NOS (OB) Loktal - white lettering - damaged box
1 7V7 $3.00 Philco 130% 3200 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Zenith 140% 3200 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 CBS 140% 3600 / 2450Gm NOS (OB) Loktal - damaged box
1 7V7 $3.00 Raytheon 130% 3400 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Raytheon 120% 3500 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Raytheon 140% 3400 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Raytheon 130% 3600 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 National Union 120% 4000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 National Union 120% 3600 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 National Union 140% 4500 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 National Union 140% 3500 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 National Union 130% 3600 / 2450Gm NOS (wb) Loktal
1 7V7 $3.00 National Union untested sealed in box NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 3400 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 130% 3400 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 3800 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 130% 3400 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 130% 3800 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 120% 3200 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 120% 3200 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 3000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4000 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4200 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 130% 3300 / 2450Gm NOS (OB) Loktal
1 7V7 $3.00 Motorola 140% 4200 / 2450Gm NOS (OB) Loktal
1 7V7 $1.00 RCA 140% 3400 / 2450Gm used (wb) Loktal - silver lettering
1 7V7 $1.00 RCA 140% 3500 / 2450Gm used (rb) Loktal - silver lettering
1 7V7 $1.00 Motorola 110% 3200 / 2450Gm used (rb) Loktal
1 7V7 $1.00 Motorola 110% 3200 / 2450Gm used (rb) Loktal
1 7V7 $1.00 Motorola 140% 4200 / 2450Gm used (rb) Loktal
1 7V7 $1.00 Sylvania 130% 2800 / 2450Gm used (rb) Loktal - green lettering
1 7V7 $1.00 Sylvania 110% 3100 / 2450Gm used (rb) Loktal - green lettering
1 7V7 $1.00 Sylvania 140% 3500 / 2450Gm used (rb) Loktal - green lettering
1 7V7 $1.00 Sylvania 130% 3800 / 2450Gm used (rb) Loktal - yellow lettering
1 7V7 $0.50 Sylvania 110% 2300 / 2450Gm used (rb) Loktal - green lettering
1 7V7 $0.50 Sylvania 100% 2200 / 2450Gm used (rb) Loktal - green lettering
1 7V7 $0.50 Motorola 100% 2500 / 2450Gm used (rb) Loktal
1 7V7 $0.50 International Service Master 90% 2400 / 2450Gm used (ob) Loktal
1 7V7 $0.50 International Service Master 90% 2500 / 2450Gm used (ob) Loktal
1 7V7 $0.50 Motorola 90% 2000 / 2450Gm used (rb) Loktal
1 7V7 $0.25 Sylvania 85% 4000 / 2450Gm used (rb) Loktal - yellow lettering
1 7W7 $2.00 Sylvania 130% 3800 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 120% 3650 / 2450Gm NOS (OB) Loktal - green lettering - water damaged box
1 7W7 $2.00 Sylvania 120% 3600 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 130% 3400 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 120% 3800 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 120% 4200 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 110% 3000 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 110% 3200 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 110% 3200 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 110% 3000 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 120% 3200 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Sylvania 110% 3000 / 2450Gm NOS (OB) Loktal - green lettering
1 7W7 $2.00 Philco 110% 3500 / 2450Gm NOS (OB) Loktal
1 7W7 $2.00 CBS 110% 3000 / 2450Gm NOS (OB) Loktal
1 7W7 $2.00 RCA 130% 3700 / 2450Gm NOS (OB) Loktal - silver lettering
1 7W7 $2.00 Natioanl Union 130% 3200 / 2450Gm NOS (OB) Loktal - missing box flap
1 7W7 $2.00 Dumont 120% 3200 / 2450Gm NOS (OB) Loktal - torn box flap
1 7W7 $2.00 Dumont 110% 3000 / 2450Gm NOS (OB) Loktal
1 7W7 $2.00 Raytheon 110% 3000 / 2450Gm NOS (OB) Loktal - damaged box
1 7W7 $1.00 Sylvania 110% 3200 / 2450Gm used (wb) Loktal - green lettering
1 7W7 $1.00 Sylvania 120% 4000 / 2450Gm 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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or
sales@fourwater.com