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
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