Transistor Equivalents

sorenj07 · 24th January 2007, 01:05 AM

I'm looking to replace some toasted-looking transistors in a Musical Fidelity B200 but am having trouble sourcing two of the small transistors. Here's the schematic:

The offenders are TR1 through TR4, but I can easily find the TIP32C and TIP31C. The ones I'm asking about are:

TR2 - BC416C
TR4 - BC414C

Here's a shot of TR4. TR2 is the exact same package.

Any help would be greatly appreciated.

CBS240 · 24th January 2007, 02:28 AM

Well, seeing as how they are uses as a CCS, they could probably be replaced with any small signal part such as a BC850 or BC856, just make sure the pins are the same. If you use a fast transistor, you might include small cap(100pf) across collector to emitter to prevent oscillations.

XEAGLEKEEPER · 24th January 2007, 02:32 AM

http://www.datasheetdirect.com/pdfs/1123128/BC416.pdf

Hopefully this datasheet displays.It has both BC414 & 416...Nuts it dont . Register at this site.Its free factsheets ,search # 83 for BC416 and both 414 and 416 come up

sorenj07 · 24th January 2007, 03:18 AM

ok, thanks

turns out the amp works after all, don't need to get replacements, but this might help someone else who needs help with their musical fidelity...

24th January 2007, 01:05 AM	#1
sorenj07 diyAudio Member Join Date: May 2006	Transistor Equivalents I'm looking to replace some toasted-looking transistors in a Musical Fidelity B200 but am having trouble sourcing two of the small transistors. Here's the schematic: The offenders are TR1 through TR4, but I can easily find the TIP32C and TIP31C. The ones I'm asking about are: TR2 - BC416C TR4 - BC414C Here's a shot of TR4. TR2 is the exact same package. Any help would be greatly appreciated.

24th January 2007, 02:28 AM	#2
CBS240 diyAudio Member Join Date: Aug 2005 Location: K-town	Well, seeing as how they are uses as a CCS, they could probably be replaced with any small signal part such as a BC850 or BC856, just make sure the pins are the same. If you use a fast transistor, you might include small cap(100pf) across collector to emitter to prevent oscillations. __________________ All the trouble I've ever been in started out as fun......

24th January 2007, 02:32 AM	#3
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	http://www.datasheetdirect.com/pdfs/1123128/BC416.pdf Hopefully this datasheet displays.It has both BC414 & 416...Nuts it dont . Register at this site.Its free factsheets ,search # 83 for BC416 and both 414 and 416 come up __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

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24th January 2007, 03:18 AM	#4
sorenj07 diyAudio Member Join Date: May 2006	ok, thanks turns out the amp works after all, don't need to get replacements, but this might help someone else who needs help with their musical fidelity...

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