[sdiy] Debugging Hammond filter circuit

Ian Fritz ijfritz at comcast.net
Sat Apr 24 16:10:15 CEST 2010


At 01:15 AM 4/24/2010, Donald Tillman wrote:


>Wow, this is a truly awful patent.   There are mistakes in the schematic, 
>the resistor reference designators start from R142 for no reason, the plot 
>has no tick marks or units, there are no voltages or levels specified...

Right.  I'm pretty rusty on designing transistor amplifiers, but doesn't 
the base need some kind of DC bias connection?

Ian 




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