Beolab 5000 (60:th), 2N3055 in the power supply breaks when speaker is connected

31 replies

I’m certain those are genuine, unlike the joke above ☺️

I agree, but polystyrene is not exactly ESD-safe, and it even caries a warning label ❓...

Martin

It's the original packaging box from ST 😕

And it's really non-conductive - I measured 🙁

strange...

 

 

Dillen wrote:

I agree, but polystyrene is not exactly ESD-safe, and it even caries a warning label ❓...

Martin

Well at least they aren’t MOSFETS 😁

 

When trying to find a larger lot than 1-2 of them most looks like the fake one.

Perhaps it's easier to find a good replacement for 2n3055 which they dont copy?

Just stick to 3055’s. The whole amplifier is built around them, like the Quad 303.

How about this from Farnell:

How about this one from Farnell?

No. Avoid those undocumented things at all cost.

Those look good:

I need more like 50 pcs...

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