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 datsaheet. There are seven transistors in total on each power amp section. I guess I’m going to have to go with those, but I’ve gotten the impression that they are not entirely suitable. HyperionAug 4, OverLoadJul 29, A total power supply voltage of 88V is really asking too much from anything in the family, even if datashret devices were pre-tested above that voltage with a curve tracer. I see that 10R series base resistors are used in the output stages, so faster output transistors are unlikely to cause difficulty.
FootFungusAug 4, And then there are three more, I have not looked at them because they are hard datashset reach, but according to the schematic they are either: Unless the amp is running at high voltages, they all should work.
Thank you for the suggestions. They spec’d 2SB and comp 2SD as suitable as well. BinaryMikeJul 29, Log in or Sign up. What about getting proper output transistors?
If anybody is interested, here’s a schematic of the amp GIF, kB. I do not really 2b688 how to find comparable devices, so I would really, really appreciate some guidance on this.
Share This Page Tweet. No, create an account now. Just get a big bag and test them?
The original output transistors were TIP34B, and I need replacements but they seem to be impossible to find. Basically it sounds like you have a smorgasbord of output transistors.
You must log in or sign up to reply here. Any help would be really appreciated! OK, so the mystery is solved.
BinaryMikeAug 4, I’ve looked at the schematic several times before but did not find anything that I could understand that well. I do intend to recap it, but I just don’t want to have any false hope over this getting fixed by that. A recap, for example, won’t help at all? It’s an OEM amp RuxmanJul 29, But I have no way of making sure they are matched.
Maybe that is why it has been smoked? If it’s clean, then overall amp performance is likely to be improved. Also, a small 1uF cap had exploded on this channel. Thanks for the advice so far. The two outputs, and then very near those, 2SA and 2SC Some are probably very. This is very 2sb68 and fun for me. 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.
Or is this caused by another part in the circuit? Without more info it’s hard to say what was dahasheet.
If I try anyway, do you still think that maybe the DC offset would be improved? No matter where I put the probes, I get continuity. Man, it is difficult to find these output transistors.