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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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It’s an OEM amp It arrived today, and now the amp works again.

FootFungusAug 4, Man, it is difficult to find these output transistors. Now, with your insight, I looked again and found something of great interest! That confirms that the TIPs are not original! RuxmanAug 4, This is very educational and fun for me. Oregon, land of magnificent datashdet. I ordered a new TIP transistor before starting this thread. However, the DC offset is very high. Please identify the amp model, so this thread will be useful to future readers. No, create an account now.

Just get a big bag and test them? Back to original question. Also, a small 1uF cap had exploded on this channel.

As mentioned, the datasueet are TIP34B datasheetbut on the blown channel, someone has replaced the transistor with a 2SB datasheet. BinaryMikeAug 1, How do you get matched pairs of transistors normally? Share This Page Tweet. A recap, for example, won’t help at all? Is it likely that any of these could be causing a high dc-offset?


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Some are probably very. Yes, my password is: There are no adjustment points for DC offset in this amp. Unless datashwet amp is running at high voltages, they all should work. In stock at mouser.

Discussion in ‘ Solid State ‘ started by RuxmanJul 29, Thank you for the suggestions. Do you already have an account? 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 datqsheet in quality and reliability.

【2SD718/2SB688 TOSHIBA】Electronic Components In Stock Suppliers in 2018【Price】【Datasheet PDF】USA

They spec’d 2SB and comp 2SD as suitable as well. Can be found at most electronic distributors. Basically it sounds dataheet you have a smorgasbord of output transistors.

Dynaco used TIP transistors in several of their designs. Tip 35C and 36C are higher powered versions and are still available. I do not really understand how to find comparable devices, so I would really, really appreciate some guidance on this. TIP33 and 34 are still available – should use the “C” version v. The original output transistors were TIP34B, and I need replacements but they seem to be impossible to find. BinaryMikeAug 4, HyperionAug 4, OK, so the mystery is solved.


Those are about as close as you can get.

I do intend to recap it, but I just don’t want to have any false hope over this getting fixed by that. I guess I’m going to have to go with those, but I’ve gotten the impression that they are not entirely suitable.

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.

dahasheet You must log in or sign up to reply here. What about getting proper output transistors? If anybody is interested, here’s a schematic of the amp GIF, kB.