Select transistors for NTP 179-xxx models?

mrzoo · Jul 6, 2009

Hi ,

I have a broken 179-150 and I found out that one of the transistors BC107B has to low Hfe 152.
I checked with a other unit and it had Hfe of 301
Does any one know what value the black and red transistor have been selected for?

Thanks
Peter

Rob Flinn · Jul 6, 2009

mrzoo said:
Hi ,

I have a broken 179-150 and I found out that one of the transistors BC107B has to low Hfe 152.
I checked with a other unit and it had Hfe of 301
Does any one know what value the black and red transistor have been selected for?

Thanks
Peter

If you look at a data sheet for the BC107b that appears within spec. Many circuits average out all these parameters of components , so that may not necessarily be your problem.

www.datasheetcatalog.org/datasheet/stmicroelectronics/9293.pdf

Select transistors for NTP 179-xxx models?

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mrzoo

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Select transistors for NTP 179-xxx models?

Help Support GroupDIY Audio Forum:

mrzoo

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Rob Flinn

Well-known member

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