Elektronische Bauelemente 2SC A, 60 V NPN Plastic Encapsulated Transistor RoHS Compliant Product A suffix of “-C” specifies halogen & lead-free . The 2SC is manufactured in a plastic TO case. When looking at the flat side with the leads pointed downward, the three leads emerging from the. 2SC datasheet, 2SC pdf, 2SC data sheet, datasheet, data sheet, pdf, Unknow, LOW FREQUENCY POWER AMP APPLICATIONS.

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If you sprinkle when you tinkle, please be neat and wipe the seat. Transistor substitution in GAR March 29, Looking forward to some results!

I’ve used the npn counterpart 2SC with good results. Very nice that Mr.

2SC2274 . Datasheet. Equivalente. Reemplazo. Hoja de especificaciones. Principales características

August 16, February 26, Low noise devices are generally graded for beta, as in the more beta the better for low noise applications. There are some newer substitutes that aren’t as low R’bb but are acceptable in general microphone preamps.

Is there any equivalent for this? Roberts joins the thread!

2SC Datasheet PDF – Sanyo

2scc2274 June 06, Bookkeeper Member Czech Republic Posts: If you sub a newer part, you may want to back off on the current density for optimal noise performance or not. You can buy small quantities on the web I still have some back in my lab. The number sounds familiar Started by jrmintz The Lab. Started by abby normal The Lab.

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No simple fix to avoid the scratchy noise with gain changes due to small DC offsets, but you might want to experiment with cap quality there. Regular transistors will be noisy in this application; I don’t know the NTE part, but I doubt it is a super low Rbb part. The original 2sb and 2sD were designed for moving coil head amps with ohm nominal source impedance, so arguably better than needed for ohm source impedance microphones.

One weak link sonically for that design is the uF cap in the gain leg That design looks like around 1 mA nominal set by ohm and Vbe of 2sc You tell me whar a man gits his corn pone, 2sc274 I’ll tell you what his ‘pinions is.

Rossi probably knows more than I do about what folks are using these days. They were using truck loads of the 2sd NPN version.

Those are super low Rbb transistors for low Z input stages. Thank you very much Perhaps they are protecting against some latch up condition. My stash of s are from my design work back in the ’70s, before I worked at Peavey. Hi all, looks like two of the channels of my mixing console were datasheft when a phantom power coupling capacitor blew up.

2SC_PDF Datasheet Download IC-ON-LINE

I typically would have run the 2sb at a little higher current density. The original Rohm transistors are discontinued; if you can’t dataseet any, try the 2SA or, not quite as low noise but still pretty good, 2N I looked around briefly this afternoon and didn’t see anything obvious Change both transistors in the input stage. The 2SA from Toshiba is an excellent super low Rbb transistor, but it has become 2c2274.


Yup, they have been obsolete for years.

Is there anything to consider changing resistor values etc. Looking at the noise figure curves wrt source impedance and current density datashet javascript: The 85 looks identical except for higher breakdown voltage than 84 so no problem with either.

2SC2274 Datasheet

First increasing current there, will decrease input signal swing datsheet saturation, unless you change other values, but more importantly, I suspect the newer replacement devices are higher Rbb and happier at lower current density. In the schematic there are 2 2sb I usually added clamp diodes backwards across the be junction of the low noise devices to make sure they never zener if reversed, as that can make them noisy.

The -E dtaasheet are higher beta than the -D. I also want to know if there is a good modern replacement for the 2sb out there.

Maybe they have REAL much in stock. You probably have two of those per mic input.