I wondered if it was something like that, I'll look into swapping my  
diode for a
schottky I really want to keep this simple though.

(Its a fan controller for a compact amp I've built and I'm aiming to  
get the fan
running at something near full speed at 1 v rms output - which is  
pretty loud)

Cheers

Ed

On 12 May 2006, at 15:13, Spehro Pefhany wrote:

> At 02:29 PM 5/12/2006 +0100, you wrote:
>> Hi all
>>
>> I'm finding it hard to search transistors by Vbe ON voltage,
>> basically I need a NPN with a fairly high sensitivity, ie saturates
>> at a small voltage on the base.
>>
>> Any ideas, nothing to specialised though, just cheap and fairly
>> available.
>>
>> Thanks
>> Ed
>
> That's because it's pretty much the same for *any* silicon BJT
> at reasonable base currents (around 0.7V at room temperature).
>
>> Best regards,
>
> Spehro Pefhany --"it's the network..."            "The Journey is  
> the reward"
> speff@interlog.com             Info for manufacturers: http:// 
> www.trexon.com
> Embedded software/hardware/analog  Info for designers:  http:// 
> www.speff.com
> ->>Test equipment, parts OLED displys http://search.ebay.com/ 
> _W0QQsassZspeff
>
>
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