[hpsdr] book RF design recommendation

[Dan Mills]

On Mon, 2012-09-24 at 20:42 -0400, Jim Sanford wrote:

> 
> I know that 50 volts is a nice value and relatively easy to obtain
> power supplies.  
> 
> So, here's the question:  Could these devices be operated at 75 or 90
> volts, and what would be the impact?

In a push pull stage the drain of the transistor that is not conducting
is driven by transformer action up to roughly twice the DC rail, hence
why a 120V part is normally run on a 50V supply.

The impact would be an expensive waste of a power device. 

Regards, Dan. 


 1348605851.0