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Willen Well-Known Member Jul 14, Thread starter Willen Start date Jul 14, A datashdet has better high frequency gain than a 2N but both have much less gain than the microwave transistors in the original project. Willen Well-Known Member Jul 15, I am going to replace transistor!! Free technical support If something goes wrong, we will be ready and willing to help!

Education equipment Industrial test tools Catalogues Laboratory measuring equipment Measuring of environmental and ambient parameters Equipment for testing of medical equipment Calibration equipment Soldering equipment Telecommunication measuring equipment. Collector — Base Voltage Vcbo. Click here to register now. Computer components Hardware Network Notebook-Battery. Calibration equipment Electrical calibration equipment Pressure calibration equipment Temperature calibration equipment.

Observe precautions for handling.

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BFR91A Datasheet PDF

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, dataeheet and gadgets. I would guess that general purpose transistors might work for T1 and T2, but T3 would need to be a wide band RF device. The original circuit used good high frequency transistors but you are using ordinary “general purpose” transistors that might melt with a supply that is as high as 12V.

Now I have hundreds of PN plastic. Datasheets, Manuals or Parts. I have never seen nor used one. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

Look this one first- www. These two kinds of charge carriers are characteristic of the two kinds of doped semiconductor material.

I haven’t used them for about 46 years but they probably still work. By continuing to use this site, you are consenting to our use of cookies. Fluke, Mikroelektronika, Knipex and Logitech. RF amplifier up to GHz range. There is no point, i feel, inchanging devices for the sake of changing. Please match your transistor types to these designators.


BFR91A 데이터시트(PDF) – List of Unclassifed Manufacturers

A transistor is a semiconductor device used to amplify and switch electronic signals and bfrr91a power. Power Dissipation Pd [Tamb.

Collector — Emitter Voltage Vceo.

Its maximum allowed heating is only mW but the max allowed heating is mW for a newer 2N To participate you need to register. Comments 0 Write your comment.

Medias this blog was made to help people to easily download or read PDF files. Replacement Transformer Started by ncag Today at 7: Potentiometer Questions Started by norbss Yesterday at Telecommunication measuring equipment Cable and pipe tracing Cooper networks IT networks Optical networks Spectrum analysers more A small current entering the base is amplified to produce a large collector and emitter current.

In contrast, unipolar transistors such as the field-effect transistors have only one kind of charge carrier. Bipolar transistors are so named because their operation involves both electrons and holes.

Design is working efficiently well using 2N devices. Willen Well-Known Member Jul 16, We see T1, T2, T3.