Transistor Database

[Soundork]

Hi all,

Restoring an old receiver and the question is: Is there a compilation of transistors (and other components) and their modern equivalents. I searched, but was unable to find.

I can also use some help identifying modern equivalents for the following transistors:

2SK 19(Y)
2SC 1047 (B)
2SC 829 (B)
2SC 644T
2SC 1047C
2SC 829C
2SC 372
2SC 1327 S OR T
2SA 494 G OR Y
2SC 1328 S,T
2SC 1509 Q, R
2SA 733 Q
2SC 1509 P, Q
2SA 777 P, Q
WZ-177
2SC 945 Q, R
1S 2471
2SD 188 M, L
2SA 627M, L
2SD 330 D, E
2SC 1328 S, T, U
2SA 763 4, 5

Thanks in advance.

Best

Soundork

 

[Enzo]

Start by googling the part number, for example:
http://www.semicon.panasonic.co.jp/ds4/2SC1047_E_discon.pdf

20v low current intended for RF. At least knowing that gets you started.

As to modern equivalents, transistors are remarkably flexible. Look at what each does in your circuit. A small signal low noise transistor can be any number of types.

I used to have a "transistor substitution guide" published by the Sams people, but that was decades ago, I am not aware of anyone trying to keep something like that up, it would be a daunting task.

A VERY crude method is to look it up in the NTE guide. If their replacement for the part is the same as for a part you are considering, then that at least gets you in the ball park.


If you are repairing an old friend, then we might make substitutions. But if you are restoring in the sense of replacing all the old types with modern ones because they are "better". that can open a can of worms. Audio is more forgiving than RF and little differences can add up to receivers that don't work well. Point being, leave transistors that are working well in place.

 

[Soundork]

Start by googling the part number, for example:
http://www.semicon.panasonic.co.jp/ds4/2SC1047_E_discon.pdf

20v low current intended for RF. At least knowing that gets you started.

As to modern equivalents, transistors are remarkably flexible. Look at what each does in your circuit. A small signal low noise transistor can be any number of types.

I used to have a "transistor substitution guide" published by the Sams people, but that was decades ago, I am not aware of anyone trying to keep something like that up, it would be a daunting task.

A VERY crude method is to look it up in the NTE guide. If their replacement for the part is the same as for a part you are considering, then that at least gets you in the ball park.


If you are repairing an old friend, then we might make substitutions. But if you are restoring in the sense of replacing all the old types with modern ones because they are "better". that can open a can of worms. Audio is more forgiving than RF and little differences can add up to receivers that don't work well. Point being, leave transistors that are working well in place.

Thank you very much.