[600MRG] Preamp transistors

[david vanhorn]

Anybody??

I've spent a few days searching, and this information seems to be about
impossible to find.  I thought this group would know if anyone would.


On Tue, Dec 27, 2016 at 10:08 AM, david vanhorn <kc6ete at gmail.com> wrote:

> Failing any transistor recommendations, any pointers to information on
> selecting transistors for this application would be very useful.
>
> I have been searching digikey and similar, but where I can even find noise
> data, it's typically specified in the audio region.
>
> Double bonus points for anything that shows rbb on the transistors in
> question.
>
> On Thu, Dec 22, 2016 at 2:19 PM, david vanhorn <kc6ete at gmail.com> wrote:
>
>> I'm looking for a very good preamp transistor for a loopstick antenna
>> project.
>> This will be a common emitter amplifier.
>> NPN, SOT23 or very similar, and as low a noise as I can get.
>> I will have less than 3V to work from.
>> I'd like to keep the collector current below 2mA if possible.
>> Impedance coming into the amp will be about 4 ohms.
>> Currently using BC847C, but it's proving rather noisy at 690uA collector
>> current.
>>
>> Any recommendations?
>>
>> --
>> K1FZY (WA4TPW) SK  9/29/37-4/13/15
>>
>
>
>
> --
> K1FZY (WA4TPW) SK  9/29/37-4/13/15
>



-- 
K1FZY (WA4TPW) SK  9/29/37-4/13/15