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Then there is Hfe, bandwidth Ft, capacitance Cob and generated noise; which are either irrelevant or relevant, depending on its very application. Your name or email address: The Q is part of the pre-amp, correct?
2SC-9014 NPN Small Signal Transistor
Last but not least Below is the block diagram for this. Looking at the 2SC datasheet, its Ft is rather high at Mhz, so it’s not the average audio AF transistor, more like a tuning circuit transistor RF.
Desoldered the good side one and it had an hFE of almost It’s capacity is also low 2. Ironically, Dafasheet just bought a Tek that is not working as well. The weak transistor has the legs blackened on it so it musta got hot but not hot enough to kill it? This circuit runs at very low collector voltage.
2SC datasheet, 2SC datasheets, manuals for 2SC electornic semiconductor part
I assume its a Hitachi, can’t find anything on the interweb on it. So I know what I put in. Cleaned all the pots and switches, still lots of static. There are also BCc but are base centered. In other words, a higher Hfe means that less current needs to be supplied by the upfront section aka higher Hfe provides higher input impedance The very linear Hfe-Ic curve of the also provides an excellent linearity of the buffer stage which benifits the distortion levels But the KSC should do fine here.
But if the lower bandwidth would have been 2sc904 for the circuit, then the equipment manufacturer would have put it! Log in or Sign up. That might very well be critical in this circuit, and therefore also stick with a SS sub. Very interesting, lots of pics, weak transistor Discussion in ‘ Solid State ‘ started by tbone8Nov 23, The digikey link for it is here https: NAD80Nov 24, Yes, my password is: Like the Tek scope.
Thanks for the replies.
(PDF) 2SC9014 Datasheet download
Top grouping is the left transistor and bottom is the right. So KSC should be good enough. After some assistance getting that fixed, my audio hobby was off and running!
I would certainly ensure to have a simular bandwidth. Share This Page Tweet. I only bring this up, as there was a Sansui thread where the signal had reduced level on one side, and was cured by changing the c to c The transistor in question is an HITC6. The right channel was still weaker than the left.
Assuming this is a good replacement, I guess a guy could bend the leads and squirrel it datashfet. Put 1kHz signal through her, signal was clean but the right was half the amplitude of the left channel.
2SC Datasheet PDF ( Pinout ) – Transistors
So, this is where I need a little help. Did a couple comparison test graphs. Sounded horrible and right channel weaker than the left. How does RF play into this? Sorry so long but I found this real interesting and educational for me. NAD80, I got dafasheet scope about 3 years ago locally from craigslist. Didn’t work, had a bad 2ec9014 and bad transistor. Oh, and I would obviously replace the pair. For all other parameters, the KSC is better.
Lots of DC at the speaker outputs, started testing caps, almost all out of specs datashset many dead. No, create an account now. Makes your life easier as well regarding legs Hfe is not much of issue here as long as it is aboveas this transistor is a “buffer stage” with at max a factor 10 amplification darasheet less than 5 Higher Hfe can sometimes be desired to “unload” the upfront circuit.
I went to digikey and looked for a hFE TO and the only one that popped up was a SS, oddly enough had the code. I have a bunch of KSC’s kicking around and wondered if they would work just as well? Below are screen captures of the DCA pro traces. It probably is a 2SC By no means an expert but this don’t look good With all that, you can select the right sub Now, if you look at the newly SS transistorthen you’ll notice that it is an exact sub for the 2SC including EBC pin layoutand I would thus very much use that one.
The pinout is different from the original to the SS but I could just put some insulators on the legs and make it fit? When subbing transistors, you’ll make sure that the allowable Vce, IC and Pc are safely above in-circuit conditions, and certainly not lower then originally installed unless you can deduct what worst-case in-circuit current can be most often only a few mA runs while the daatsheet is ranked mA, so a 50mA ranked sub-transistor could do as well.