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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 The 2sb has a higher voltage rating, and the is rated at higher current. Discussion in ‘ Solid State ‘ started by RuxmanJul 29, It arrived today, and now the amp works again.

2SB688 Datasheet, Equivalent, Cross Reference Search

Basically it sounds like you have a smorgasbord of output transistors. I do not really understand how to find comparable devices, so I would really, really appreciate some guidance on this.

What about getting proper output transistors? Dynaco used TIP transistors in several of their designs. I see that 10R series base resistors are used in the output stages, so faster output transistors are unlikely to cause difficulty.

Thank you for the 2b688. Now, with your insight, I looked again daatasheet found something of great interest! The original output transistors were TIP34B, and I need replacements but they seem to be impossible to find.


2SB Datasheet, PDF – Alldatasheet

Some are probably very. Your name or email address: However, the DC offset is very high. I have an amp with a blown channel. BinaryMikeAug 4, Man, it is difficult datqsheet find these output transistors. OverLoadJul 29, Please identify the amp model, so this thread will be useful to future readers.

If Datashwet try anyway, do you still think that maybe the DC offset would be improved? Back to original question. HyperionAug 4, Yes, my password is: They spec’d 2SB and comp 2SD as suitable as well.

In stock at mouser. A total power supply voltage of 88V is really asking too much dataeheet anything in the family, even if the devices were pre-tested above that voltage with a curve tracer. 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.

This is very educational and fun for me. TIP33 and 34 are still available – should use the “C” version v. How do you get matched pairs of transistors normally? If it’s clean, then overall amp datasueet is likely to be improved. BinaryMikeAug 1, Share This Page Tweet.


RuxmanJul 29, You had a schematic the whole time?! Dr TinearJul 29, That confirms that the TIPs are not original!

There are no adjustment points for DC offset in this amp. No, create an account now. So I take it that these two transistors are the only thing that is relevant for the dc offset?

Or is this caused by another part in the circuit? OK, so the mystery is solved.

2SB688 Datasheet

As mentioned, the originals are TIP34B datasheetbut on the blown channel, someone has replaced the transistor with a 2SB datasheet. Unless the amp is running at high voltages, they all should work. The two outputs, and then very near those, 2SA and 2SC Can be found at most electronic distributors.

Log in or Sign up. I’ve looked at the schematic several times before but did not find anything that I could understand that well. Just get a big bag and test them?