[Elecraft] Harmonic Distortion and Audio Intermodulation in K3'sLIN OUT Port

[David Cutter]

Jack

The obvious question is: what is the purpose of the resistor?  Perhaps to 
create a driving source to comply with the manufacturer's data?

David
G3UNA


> What I found is that the 604 ohm resistor between U29's output amplifier 
> stage and the TTC-108 transformer primary winding forces the TTC-108 
> isolation transformer to operate in a regime where the performance 
> improving effects of a zero ohm driving source are not available. Hence, 
> the TTC-108's 0.5% THD performance significantly limits the LIN OUT ports 
> performance.
> >
> Jack K8ZOA
> www.cliftonlaboratories.com
>
>