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Electrolytic capacitor in timing use?

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eem2am

Aug 3, 2009
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Hello,
C8, in the following schematic , is a 10uF electrolytic capacitor. It is rated 16V.
As you can see, it is across the Base-emitter of a BJT, thus it never gets any more than 0.7V across it.
Do you believe that this should be a ceramic capacitor instead?
 

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duke37

Jan 9, 2011
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I do not see an electrolytic capacitor of any value across a base/emitter junction.
C3 is 1nF
C7 is 10nF
There is no 10µF
These can be plastic film types. (polyester ot polypropylene)
 

davenn

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C8 across Q5 is 10uF is it not?

agreed :)

eem2am, why are you particularly worried about that transistor and cap ?
more than half of the transistors have electros across the base and emitter


Dave
 

davenn

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is this going to be another one of your wild goose chases ?



Dave
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Do you believe that this should be a ceramic capacitor instead?

I would tend to recommend waxed paper capacitors for anything under maybe 0.5 uF.

Ask your boss about the possibilities...
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Hang on a second. Didn't I ask you to stop posting about this until you answered my questions.

Thread closed, and holiday awarded.
 
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