Are these Fake? (NKT275)

[BernardBlack]

I recently came upon a brick and mortar electronics store and hidden in a box in a the surplus section was this NKT275.

The case matches a few trannies that I seen from original Fuzz Faces but the label isn't the same kind. I haven't built the geofx circuit to test them but does anyone have an info on these?

[tonyharker]

Yes they may be. The writing should be the other way round and in 2 lines, NKT in one and 275 in the other. There should also be a red dot next to the collector lead. Google NKT275 and you'll see what I mean. However, they may well fit the 275 parameters. If they are germanium they could well work. Other than Newmarket Transistors themselves many other manufacturers made similar transistors which if they met the NKT specs, would be recoded and sold as equivalents. Philips/Mullard comes to mind. I know they did. Beware the ones with a flanged base they were usually remarked AC128s

[Dirk_Hendrik]

Eeehrm..

Wasn't it the other way around? That many parts from various manufacturers were rebadged to a NKT label and sold as "replacements"?

[BernardBlack]

Well, who knows?

I did find some examples with the label across the transistors. They belong to the early 90's reissues.

[Electric Warrior]

The writing should be the other way round and in 2 lines, NKT in one and 275 in the other. There should also be a red dot next to the collector lead.

There are at least three different styles that were used in vintage Fuzz Faces. While the more common types were labled length wise, this variant is also period correct:

nkt.png

Other variants, not used in vintage Fuzz Faces, had white dots or no dots at all.

I do agree about the transistor in the original poster's pic, though. It's probably not a newmarket made part.