Tubes
Testers
Companies
Submit
About

Tube Database (7,341 tube types · 1,270 archive entries)

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)

Disclaimer Submit a tube

Tube record

7581A, KT66

Brand: National Electronics

Round Tip

Base: Black
Bottle Height: Tall Bottle
Country: U.S.S.R.
Getter: Bottom Getter
Glass Color: Clear Glass
Mica: Double
Archive ID: u0uhg7ec

Pin Color

Silver Pins

Plate Color

Matte Gray

Tip Shape

Round Tip

More tubes branded National Electronics

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.
Photo 1 of 4
5AR4
Brand
National Electronics
KT88
Maker
Cetron
Brand
National Electronics
Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.
Photo 1 of 2
E283CC
Brand

National Electronics

More 7581A type tube

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.
Photo 1 of 3
7581A
Maker
Ge
Brand
RCA

Equivalent and related tube numbers

Commonly cross-referenced designations for KT66. Compatibility is not guaranteed. Before substituting, verify socket and pinout, heater voltage and current, bias requirements, and maximum ratings against the relevant manufacturers’ datasheets.

5881
6L6

More KT66 type tubes

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.
Photo 1 of 9

KT66

Brand: G.E.C.

Genalex KT66 tube — photo 1 of 7

Genalex KT66 tube — photo 2 of 7

Genalex KT66 tube — photo 3 of 7

Genalex KT66 tube — photo 4 of 7

Genalex KT66 tube — photo 5 of 7

Genalex KT66 tube — photo 6 of 7

Genalex KT66 tube — photo 7 of 7

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 7

KT66

Brand: Genalex

Marconi KT66 tube — photo 1 of 3

Marconi KT66 tube — photo 2 of 3

Marconi KT66 tube — photo 3 of 3

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 3

KT66

Brand: Marconi

Marconi KT66 tube — photo 1 of 7

Marconi KT66 tube — photo 2 of 7

Marconi KT66 tube — photo 3 of 7

Marconi KT66 tube — photo 4 of 7

Marconi KT66 tube — photo 5 of 7

Marconi KT66 tube — photo 6 of 7

Marconi KT66 tube — photo 7 of 7

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 7

KT66

Brand: Marconi

MWT KT66 tube - M-O Valve Co. Ltd — photo 1 of 4

MWT KT66 tube - M-O Valve Co. Ltd — photo 2 of 4

MWT KT66 tube - M-O Valve Co. Ltd — photo 3 of 4

MWT KT66 tube - M-O Valve Co. Ltd — photo 4 of 4

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 4

KT66

Maker: M-O Valve Co. Ltd
Brand: MWT

Osram KT66 tube — photo 1 of 3

Osram KT66 tube — photo 2 of 3

Osram KT66 tube — photo 3 of 3

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 3

KT66

Brand: Osram

Emitron KT66 tube — photo 1 of 8

Emitron KT66 tube — photo 2 of 8

Emitron KT66 tube — photo 3 of 8

Emitron KT66 tube — photo 4 of 8

Emitron KT66 tube — photo 5 of 8

Emitron KT66 tube — photo 6 of 8

Emitron KT66 tube — photo 7 of 8

Emitron KT66 tube — photo 8 of 8

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 8

KT66

Brand: Emitron

G.E.C. KT66 tube — photo 1 of 8

G.E.C. KT66 tube — photo 2 of 8

G.E.C. KT66 tube — photo 3 of 8

G.E.C. KT66 tube — photo 4 of 8

G.E.C. KT66 tube — photo 5 of 8

G.E.C. KT66 tube — photo 6 of 8

G.E.C. KT66 tube — photo 7 of 8

G.E.C. KT66 tube — photo 8 of 8

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 8

KT66

Brand: G.E.C.

Osram KT66 tube — photo 1 of 2

Osram KT66 tube — photo 2 of 2

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 2

KT66

Brand: Osram

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 1 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 2 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 3 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 4 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 5 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 6 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 7 of 8

Genalex, Gold Monarch KT66 tube - M-O Valve Co. Ltd — photo 8 of 8

Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

Photo 1 of 8

KT66

Maker: M-O Valve Co. Ltd
Brand: Genalex, Gold Monarch