Re: WANTED: Good Source of Electronics Theory

"EADGBE" <hwbosshoss@[EMAIL PROTECTED]
> wrote in message
news:785f8ff8-a4a8-4389-8337-023b58d8060e@[EMAIL PROTECTED]
> On Apr 21, 6:41 pm, Eeyore <rabbitsfriendsandrelati...@[EMAIL PROTECTED]
>
> wrote:
>>>There is only 131.1mV on the collector of Q205, despite +11.09V on its
>>>base and +11.59V on its emitter.
> >
> > And yet you continue to refuse to *directly* measure it's Vbe which is
> > what's im****tant.
>
> According to the datasheet for Q205, the Vbe is:
>
> MINIMUM: -0.58
> TYPICAL: -0.62
> MAXIMUM: -0.68
>
> These figures were arrived at using the following test conditions:
>
> Vce = -6.0V
> Ic = -1.0mA


And from your own measurements there is only 0.50V Base-emitter, so the
transistor is not correctly biased.
Possibly a fault in a preceding stage, or even an O/C resistor or possibly
a
dry joint.
Keep looking and measuring other voltages.

MrT.