SS – Brake constant of feedback path #5 (Ultra short feedback loop)
Untill I have found a solution follow link to some af the calcualtions made with R.
Link to page where cT3 and TRH is chosen as parameters. LINK
Link to a page where TRH and FT4 are chosen as parameters – with some explanation. LINK
At this site I have found and evaluated the SimThyr app.