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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I have an amp with a blown channel.

Yes, my password is: How do you get matched pairs of transistors normally? They spec’d 2SB and comp 2SD as suitable as well. Please identify the amp model, so this thread will be useful to future readers. There are no adjustment points for DC offset in this amp. I see that 10R series base resistors are used in the output stages, so faster output transistors are unlikely to cause difficulty.

Thanks a lot for the help! Discussion in ‘ Solid State ‘ started by RuxmanJul 29, I ordered a new TIP transistor before starting this thread. Thank you for the suggestions. Unless the amp is running at high voltages, they all should work. I’ve looked at the schematic several times before but did not find anything that I could understand that well. TIP33 and 34 are still available – should use the “C” version v. Your name or email address: I guess I’m going to have to go with those, but I’ve gotten the impression that they are not entirely suitable.


What about getting proper output transistors? I do not really understand how to find comparable devices, so I would really, really appreciate some guidance on this. BinaryMikeAug 1, BinaryMikeJul 29, There are seven transistors in total on each power amp section. I can find these, but I do not know if they’re a good replacement. You had a schematic the whole time?!

If it’s clean, then overall amp performance is likely to be improved. If I try anyway, do you still think that maybe the DC offset would be satasheet Those are about as close as you can get.

IMO the 2sb and 2sd would probably be the best sounding if you could get the original Toshiba parts – most are now made in China and vary in quality and reliability. Now, with your insight, I looked again and found something of great interest! The original output transistors were TIP34B, and I need replacements but they seem to be impossible to find. 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: The two outputs, and then very near those, 2SA and 2SC BinaryMikeAug 4, 2sg688 matter where I put datashee probes, I get continuity.

Dr TinearJul 29, A recap, for example, won’t help at all?

Man, it is difficult to find these output transistors. Can be found dataaheet most electronic distributors. You must log in or sign up to reply here.


Without more info it’s hard to say what was original. If anybody is interested, here’s datasheef schematic of the amp GIF, kB. No, create an account now.

Need a modern replacement of a TIP34B transistor

Tip 35C and 36C are higher powered versions and are still available. FootFungusAug 4, OK, so the mystery is solved. RuxmanJul 29, It arrived today, and now the amp works again. Share This Page Daatsheet. I have taken out the TIP on the blown channel and everything is shorted.

I do intend to recap it, but I just don’t want to have any false hope over this getting fixed by that. The 2sb has a higher voltage rating, and the is rated at higher current. Just get a big bag and test them?

2SB Datasheet PDF – Wing Shing International Group

I do intend to get the proper transistors soon, this was just a test. This is very educational and fun for me. Also, a small 1uF cap had exploded on this channel. That confirms that the TIPs are not original! Log in or Sign up. Basically it sounds like you have a smorgasbord of output transistors.