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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(Datasheet) 2SB pdf – POWER TRANSISTORS(8A/V/80W) (1-page)
You must log in or sign up to reply here. 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.
Without more info it’s hard to say what was original. RuxmanJul 29, Can be found at most electronic distributors. Some are probably very.
HyperionAug 4, And finally, 2SC or 2SC Now, with your insight, I looked again and datashret something of great interest!
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.
Tip 35C and 36C are higher powered versions and are still available.
Basically it sounds like you have a smorgasbord of output transistors. I see that 10R series base resistors are used in the output stages, so faster output transistors are unlikely to cause difficulty. Yes, my password is: Your name or email address: I have an amp with a blown channel.
It’s an OEM amp Thank you for the suggestions. How do you get matched pairs of transistors normally? So I take it that these two transistors are the only thing that is relevant for the dc offset?
BinaryMikeAug 1, The original output transistors were TIP34B, and I need replacements but they seem to be impossible to find.
Dataseet ordered a new 2sb6888 transistor before starting this thread. I do intend to recap it, but I just don’t want to have any false hope over this getting fixed by that. 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.
There are seven transistors in total on each power amp section. Do you already have an account? Just get a big bag and test them? They spec’d 2SB and comp 2SD as suitable as well.
【2SD718/2SB688 TOSHIBA】Electronic Components In Stock Suppliers in 2018【Price】【Datasheet PDF】USA
There are no adjustment points for DC offset in this amp. That’s enough increase in speed to provoke HF instability in some amp circuits, so the repair definitely should be checked for parasitic oscillation.
A recap, for example, won’t help at all? Dr TinearJul 29, I do intend to get the proper transistors soon, this was just a test.
BinaryMikeJul 29, Dynaco used TIP transistors in several of their designs.
2SB Datasheet PDF –
Unless the amp is running at high voltages, they all should work. Any help would be really appreciated!
The 2sb has a higher voltage rating, and the is adtasheet at higher current. If I try anyway, do you still think that maybe the DC offset would be improved?