Re: Cathode Bias PushPull

On Wed, 23 Apr 2008 00:24:43 +0200, "RealInfo"
<therightinfo@[EMAIL PROTECTED]
> wrote:

>Hi
>
>I want to do a chatode bias low power push pull stage , how do I
calculate 
>the
>cathode bias resitors ?
>
>Thanks
>ec 

Assuming grid is referenced to ground and a traditional single, common
cathode, Rk to ground,

Rk = Vbias/(2 x idle)

Where Vbias is the desired bias voltage and idle is the per tube idle
current at that bias voltage, with the 2x because there are two tubes.

Just a simple case of R=E/I

Picking idle current is the bigger trick.