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isc website: 1 isc Silicon PNP Power Transistor. 2SB DESCRIPTION. ·Collector-Emitter Breakdown Voltage V(BR)CEO= V(Min) . 2SB Transistor Datasheet pdf, 2SB Equivalent. Parameters and Characteristics. SILICON PNP TRIPLE DIFFUSED TYPE. 2SB Unit in mm. AUDIO FREQUENCY POWER AMPLIFIER APPLICATIONS. MAX. FEATURES.

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And finally, 2SC or 2SC Just get a big bag and test them? Some are probably very. You must log in or sign up to reply here.

2SB PNP Transistor – NTE37

FootFungusAug 4, Maybe that is why it has been smoked? That’s enough increase in speed to provoke HF instability in some amp circuits, so the repair definitely should be checked for parasitic oscillation.

There are seven transistors in total on each power amp section.

Man, it is difficult to find these output transistors. Thanks a lot for the help!

2SB688 . Datasheet. Equivalente. Reemplazo. Hoja de especificaciones. Principales características

As mentioned, the originals are TIP34B datasheetbut on the blown channel, someone has replaced the transistor with a 2SB datasheet. If anybody is interested, here’s a schematic of the amp GIF, kB.


Discussion in ‘ Solid State ‘ started by RuxmanJul 29, I do intend to get the proper transistors soon, this was just a test.

I have taken out the TIP on the blown channel and everything is shorted. Also, a small 1uF cap had exploded on this channel. Datzsheet had a schematic the whole time?!

(Datasheet) 2SB pdf – POWER TRANSISTORS(8A/V/80W) (1-page)

Can be found at most electronic distributors. Now, with your insight, I looked again and found something of great interest! A recap, for example, won’t help at all? Any help would be really appreciated! The original output transistors were TIP34B, and I need replacements but they datashwet to be impossible to find.

But I have no way of making sure they are matched.

OverLoadJul 29, Back to original question. HyperionAug 4, I guess I’m going to have to go with those, but I’ve gotten the impression that they are not entirely suitable.

I have an amp with a blown channel. BinaryMikeAug 4, No, create an account now. RuxmanJul 29, Is it likely that any of these could be causing a high dc-offset?

Log in or Sign up. Unless the amp is running at high voltages, they all should work.

Need a modern replacement of a TIP34B transistor

Your name or email address: However, the DC offset is very high. What about getting proper output transistors? Share This Page Tweet. IMO the 2sb and 2sd would probably be the best sounding if you could get the original 2sb868 parts – most are now made in China and vary in quality and reliability. No matter where I put the probes, I get continuity.


A total power supply voltage of 88V is really asking too much from anything in the family, even if the devices were pre-tested above that voltage with a curve tracer. BinaryMikeJul 29, TIP33 and 34 are still available – should use the “C” version v. Yes, my password is: I can find these, but I do not know if they’re a good replacement.

If it’s clean, then overall amp performance is datashdet to be improved. Dr TinearJul 29, And then there are three more, I have not looked at them because they are hard to reach, but according to the schematic they are either: