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 XXL $6.00 National Union 130% 3000 / 2000Gm NOS (OB) Loktal
1 7A4 / XXL $6.00 RCA 110% 2500 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 RCA 110% 2400 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 RCA 120% 2700 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 RCA 110% 2500 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 RCA 120% 2800 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 RCA 120% 2800 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 / XXL $6.00 National Union 130% 2700 / 2000Gm NOS (OB) Loktal
1 7A4 / XXL $6.00 National Union 120% 2600 / 2000Gm NOS (OB) Loktal
1 7A4 / XXL $6.00 National Union untested sealed in box NOS (OB) Loktal
1 7A4 $5.00 Raytheon 130% 3000 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Raytheon 130% 2900 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A4 $5.00 Raytheon 140% 3200 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Raytheon 140% 3000 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Raytheon 140% 2900 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Raytheon 120% 2200 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Raytheon 120% 2800 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A4 $5.00 RCA 140% 3100 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 $5.00 RCA 110% 2600 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 $5.00 RCA 130% 2800 / 2000Gm NOS (OB) Loktal - silver lettering
1 7A4 $5.00 RCA 140% 3200 / 2000Gm NOS (wb) Loktal - silver lettering
1 7A4 $5.00 Hytron 110% 2300 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Ken-Rad 120% 2900 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A4 $5.00 Ken-Rad 110% 2300 / 2000Gm NOS (OB) Loktal - sealed in box
1 7A4 $5.00 GE 120% 2600 / 2000Gm NOS (OB) Loktal - white lettering
1 7A4 $5.00 GE 120% 3000 / 2000Gm NOS (OB) Loktal - white lettering
1 7A4 $5.00 GE 110% 2500 / 2000Gm NOS (OB) Loktal - white lettering
1 7A4 $5.00 GE 110% 2400 / 2000Gm NOS (OB) Loktal - white lettering
1 7A4 $5.00 Tung-Sol 140% 3200 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Tung-Sol 120% 3000 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Tung-Sol 120% 2600 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 Sylvania 110% 2800 / 2000Gm NOS (OB) Loktal - yellow lettering
1 7A4 $5.00 Sylvania 140% 3000 / 2000Gm NOS (OB) Loktal - green lettering
1 7A4 $5.00 National Union 120% 2900 / 2000Gm NOS (OB) Loktal
1 7A4 $5.00 National Union 140% 3000 / 2000Gm NOS (OB) Loktal
1 7A4 $2.50 Sylvania 100% 2200 / 2000Gm used (rb) Loktal - green lettering
1 XXL $2.50 Tung-Sol 130% 2800 / 2000Gm used (ob) Loktal
1 7A5 $4.00 National Union 110% 4400 / 4000Gm NOS (OB) Loktal
1 7A5 $4.00 GE 120% 4900 / 4000Gm NOS (OB) Loktal - white lettering
1 7A5 $4.00 GE 110% 5000 / 4000Gm NOS (OB) Loktal - white lettering - sealed in box
1 7A5 $4.00 GE 110% 5000 / 4000Gm NOS (OB) Loktal - white lettering - damaged box
1 7A5 $4.00 GE 110% 5000 / 4000Gm NOS (OB) Loktal - white lettering - sealed in box
1 7A5 $4.00 Ken-Rad 110% 4800 / 4000Gm NOS (OB) Loktal - sealed in box
1 7A5 $4.00 Hytron 120% 5200 / 4000Gm NOS (OB) Loktal
1 7A5 $4.00 Raytheon 110% 5000 / 4000Gm NOS (OB) Loktal
1 7A5 $4.00 Raytheon 115% 5200 / 4000Gm NOS (OB) Loktal - black coat
1 7A5 $4.00 Raytheon 110% 5000 / 4000Gm NOS (OB) Loktal - sealed in box
1 7A5 $4.00 Sylvania 120% 4800 / 4000Gm NOS (OB) Loktal - green lettering
1 7A5 $4.00 Sylvania 110% 5000 / 4000Gm NOS (OB) Loktal - white lettering - JAN - black coat
1 7A5 $4.00 Sylvania untested sealed in box NOS (OB) Loktal
1 7A5 $4.00 Philco 110% 4800 / 4000Gm NOS (OB) Loktal - sealed in box
1 7A5 $4.00 Philco 110% 5000 / 4000Gm NOS (OB) Loktal - sealed in box
1 7A5 $4.00 Tung-Sol 110% 4800 / 4000Gm NOS (OB) Loktal - black coat
1 7A5 $4.00 RCA 110% 5100 / 4000Gm NOS (OB) Loktal - silver lettering
1 7A5 $4.00 RCA 110% 4800 / 4000Gm NOS (OB) Loktal - silver lettering
1 7A5 $4.00 RCA 110% 5000 / 4000Gm NOS (OB) Loktal - silver lettering
1 7A5 $4.00 RCA 120% 5000 / 4000Gm NOS (OB) Loktal - red lettering
1 7A5 $4.00 GE 110% 4600 / 4000Gm NOS (OB) Loktal - white lettering
1 7A5 $4.00 Philco 110% 4300 / 4000Gm used (OB) Loktal
1 7A5 $4.00 RCA 120% 4900 / 4000Gm used (OB) Loktal - silver lettering - minor rust on base
1 7A5 $4.00 RCA 110% 5000 / 4000Gm used (OB) Loktal - red lettering - minor rust on base
1 7A5 $4.00 RCA 90% 3800 / 4000Gm used (OB) Loktal - silver lettering
1 7A5 $4.00 Philco 100% 4700 / 4000Gm NOS (OB) Loktal - silver lettering - minor rust on base
1 7A5 $4.00 Sylvania 90% 4800 / 4000Gm NOS (OB) Loktal - yellow lettering
1 7A6 $2.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering - JAN
1 7A6 $2.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering - JAN
1 7A6 $2.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering - JAN
1 7A6 $2.00 Sylvania 120% / 130% --- NOS (OB) Loktal - green lettering - JAN
1 7A6 $2.00 RCA 120% / 130% --- NOS (OB) Loktal - silver lettering - damaged box
1 7A6 $2.00 RCA 120% / 130% --- NOS (OB) Loktal - silver lettering
1 7A6 $2.00 GE 120% / 120% --- NOS (OB) Loktal - white lettering - damaged box
1 7A6 $2.00 GE 120% / 130% --- NOS (OB) Loktal - sealed in box
1 7A6 $2.00 GE 110% / 110% --- NOS (OB) Loktal - sealed in box
1 7A6 $2.00 Ken-Rad 110% / 110% --- NOS (OB) Loktal - sealed in box
1 7A6 $2.00 Zenith 120% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Raytheon 130% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Philco 130% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Philco 130% / 130% --- NOS (OB) Loktal - damaged box
1 7A6 $2.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering
1 7A6 $2.00 Sylvania 130% / 130% --- NOS (OB) Loktal - green lettering
1 7A6 $2.00 Sylvania 130% / 130% --- NOS (OB) Loktal - green lettering
1 7A6 $2.00 Sylvania 120% / 130% --- NOS (OB) Loktal - green lettering
1 7A6 $2.00 Sylvania 120% / 130% --- NOS (OB) Loktal - green lettering
1 7A6 $2.00 Sylvania 120% / 120% --- NOS (OB) Loktal - green lettering - sealed in box
1 7A6 $2.00 Sylvania 130% / 130% --- NOS (OB) Loktal - green lettering - damaged box
1 7A6 $2.00 Motorola 130% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Motorola 130% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Motorola 130% / 130% --- NOS (OB) Loktal
1 7A6 $2.00 Motorola 130% / 130% --- NOS (OB) Loktal
1 7A6 $1.00 Sylvania 120% / 120% --- used (rb) Loktal - green lettering
1 7A6 $1.00 Sylvania 120% / 110% --- used (rb) Loktal - green lettering
1 7A6 $1.00 Sylvania 130% / 130% --- used (rb) Loktal - green lettering
1 7A6 $1.00 Sylvania 110% / 100% --- used (rb) Loktal - green lettering
1 7A6 $1.00 Philco 120% / 110% --- used (rb) Loktal
1 7A6 $1.00 Philco 140% / 110% --- used (wb) Loktal
1 7A6 $1.00 Philco 120% / 130% --- used (rb) Loktal
1 7A6 $1.00 Silvertone 120% / 120% --- used (rb) Loktal
1 7A6 $0.50 Sylvania 110% / 100% --- used (OB) Loktal - green lettering - JAN
1 7A6 $0.50 Silvertone 110% / 100% --- used (rb) Loktal
1 7A6 $0.50 Sylvania 100% / 110% --- used (rb) Loktal - green lettering
1 7A6 $0.50 unknown 110% / 100% --- used (wb) Loktal
1 5679 $5.00 Sylvania 130% / 130% --- NOS (OB) Loktal - yellow lettering - 7A6 with CT heater (7CX base)
1 7AD7 $4.00 RCA 120% 6500 / 5000Gm NOS (OB) Loktal - red lettering
1 7AD7 $4.00 RCA Victor 110% 6500 / 5000Gm NOS (OB) Loktal
1 7AD7 $4.00 Philco 110% 7000 / 5000Gm NOS (OB) Loktal
1 7AD7 $4.00 Sylvania 120% 6000 / 5000Gm NOS (OB) Loktal - green lettering
1 7AD7 $4.00 GE 110% 7500 / 5000Gm NOS (OB) Loktal - white lettering
1 7AD7 $4.00 Hytron Bantam untested sealed in box NOS (OB) Loktal
1 GB-6145 $7.50 Sylvania 120% 9000 / 5000Gm NOS (OB) Loktal - gold lettering - 11 watt version of 7AD7
1 7AF7 $10.00 RCA 120% / 120% 2600: 2600 / 2600Gm NOS (OB) Loktal - silver lettering
1 7AF7 $10.00 RCA 120% / 125% 2700: 2800 / 2600Gm NOS (OB) Loktal - red lettering
1 7AF7 $10.00 RCA 140% / 140% 3000: 3000 / 2600Gm NOS (OB) Loktal - silver lettering
1 7AF7 $10.00 GE 130% / 130% 2800: 2800 / 2600Gm NOS (OB) Loktal - silver lettering
1 7AF7 $10.00 Sylvania 120% / 120% 2800: 2800 / 2600Gm NOS (OB) Loktal - green lettering
1 7AF7 $10.00 Sylvania 130% / 130% 2800: 2800 / 2600Gm NOS (wb) Loktal - green lettering
1 7AF7 $10.00 Philco 130% / 130% 2900: 2800 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Philco 110% / 120% 2600: 2600 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Philco 110% / 110% 2600: 2600 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Philco 110% / 120% 2600: 2600 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Philco 125% / 115% 2700: 2600 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Philco 130% / 130% 2800: 2800 / 2600Gm NOS (OB) Loktal
1 7AF7 $10.00 Raytheon 125% / 125% 2800: 2800 / 2600Gm NOS (OB) Loktal - sealed in box
1 7AF7 $10.00 Raytheon 125% / 125% 2600: 2600 / 2600Gm NOS (OB) Loktal
1 7AF7 $10.00 Raytheon 130% / 140% 2700: 2800 / 2600Gm NOS (OB) Loktal
1 7AF7 $4.00 unknown 100% / 110% 1800: 1900 / 2600Gm used wb) Loktal
1 7AF7 $3.00 Sylvania 90% / 100% 2000: 2200 / 2600Gm used (OB) Loktal - green lettering
1 7AG7 $4.00 RCA 120% 3500 / 2700Gm NOS (OB) Loktal - silver lettering
1 7AG7 $4.00 GE 110% 3200 / 2700Gm NOS (OB) Loktal - white lettering
1 7AG7 $4.00 GE 140% 4200 / 2700Gm NOS (OB) Loktal - red lettering
1 7AG7 $4.00 Philco 120% 3200 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Sylvania 140% 4100 / 2700Gm NOS (OB) Loktal - yellow lettering
1 7AG7 $4.00 Sylvania 120% 3600 / 2700Gm NOS (OB) Loktal - yellow lettering
1 7AG7 $4.00 Sylvania 120% 3400 / 2700Gm NOS (OB) Loktal - green lettering - water dmaaged box - missing box flap
1 7AG7 $4.00 Raytheon 130% 3800 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Motorola 130% 4000 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Motorola 120% 3700 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Motorola 120% 3600 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Motorola 110% 3500 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Motorola 140% 4500 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Westinghouse 130% 3800 / 2700Gm NOS (OB) Loktal
1 7AG7 $4.00 Hytron 110% 3200 / 2700Gm NOS (wb) Loktal
1 7AG7 $2.00 Raytheon 105% 2800 / 2700Gm used (rb) Loktal
1 7AG7 $2.00 Philco 120% 3700 / 2700Gm used (OB) Loktal - minor rust on base
1 7AG7 $2.00 Sylvania 100% 2600 / 2700Gm used (wb) Loktal - green lettering
1 7AG7 $2.00 unknown 130% 4000 / 2700Gm used (rb) Loktal
1 GB-7AK7 $7.50 Sylvania 120% 2900 / 1600Gm NOS (OB) Loktal - gold lettering
1 GB-7AK7 $7.50 Sylvania 120% 2200 / 1600Gm NOS (OB) Loktal - gold lettering
1 GB-7AK7 $7.50 Sylvania 120% 2100 / 1600Gm NOS (OB) Loktal - gold lettering
1 GB-7AK7 $4.00 Sylvania 120% 2500 / 1600Gm used (wb) Loktal - gold 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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