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 do not really understand how to find comparable devices, so I would really, really appreciate some guidance on this. Yes, my password is: OK, so the mystery is solved. A recap, for example, won’t help at all? RuxmanJul 2b688, Dynaco used TIP transistors in several of their designs. If I try anyway, do you still think that maybe the DC offset would be improved?

Also, a small 1uF cap had exploded on datasheett channel. Maybe that is why it has been smoked?

I do intend to get the proper transistors soon, this was just a test. No matter datadheet I put the probes, I get continuity.

Please identify the amp model, so this thread will be useful to future readers. That confirms that the TIPs are not original!

RuxmanAug 4, It’s an OEM amp Discussion in ‘ Solid State ‘ started by RuxmanJul 29, I have taken out the TIP on the blown channel and everything is shorted. 2sg688 ordered a new TIP transistor before starting this thread.


I guess I’m going to have to go with those, but I’ve gotten the impression that they are not entirely suitable. As mentioned, the originals are TIP34B datasheetbut on the blown channel, someone has replaced the transistor with a 2SB datasheet. What about getting proper output transistors? They spec’d 2SB and comp 2SD as suitable as well.

2SB datasheet & applicatoin notes – Datasheet Archive

This is very educational and fun for me. OverLoadJul dayasheet, I see that 10R series base resistors are used in the output stages, so faster output transistors are unlikely to cause difficulty.

There are seven transistors in total on each power amp section. I do intend to recap it, but I just don’t want to have any false hope over this getting fixed by that.

It arrived today, and now the amp works again.

I have an amp with a blown channel. Can 2ssb688 found at most electronic distributors. Now, with your insight, I looked again and found something of great interest!

The 2sb has a higher voltage rating, and the is rated at higher current. You must log in or sign up to reply here.

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

Do you already have an account? Thanks a lot for the help! Just get a big darasheet and test them? 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: Is it likely that any of these could be causing a high dc-offset?


But I have no way of making sure they are matched. Thanks for the advice so far. Some are probably very. Man, it is difficult to find these output transistors.

2SB688 Datasheet PDF

A random pair of KSA devices from the same batch are probably matched well enough for the input diff-amp stage, especially if you get them from the highest hFE ranks F or E.

If anybody is interested, here’s a schematic of the amp GIF, kB. That’s enough increase in speed to provoke HF instability in some amp circuits, so the repair definitely should be checked for parasitic oscillation.

You had a schematic the whole time?!

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

The original output transistors dayasheet TIP34B, and I need replacements but they seem to be impossible to find. Any help would be really appreciated! TIP33 and 34 are still available – should use the “C” version v.

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