Re: WANTED: Good Source of Electronics Theory

"Mr.T" <MrT@[EMAIL PROTECTED]
> wrote in message 
news:480d6580$0$30462$afc38c87@[EMAIL PROTECTED]
>
> "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.
>
>

Silly thought, but you *have* connected 205 the right way round when you 
replaced it.........

S.


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