Hi, guys.
Hopefully someone can explain to me how to calculate or otherwise determine the 'ideal' or 'proper' ratio to spec. for a mic input transfo.
From what (little) I know it has to do with input noise voltage of the tube used, I think. ???
I wondering about, really, the lowest ratio I can 'get away with' without penalty (other than the obv. of using a xfmr in the first place) since I don't really 'need' much gain from the transfo itself, just enough to give the tube what it wants to see/hear/feel/eat/etc in order for it to 'act right' in this situation.
I wish to have a mic input transformer made for a balanced tube preamp circuit (the circuit is done, works fine, uses four tubes per channel (I have cases!), two per +/-, provides appr. 60 db of gain, low output imp. and uses no output xfmr, I love it!).
Thank you for your thoughts...
Chris
Hopefully someone can explain to me how to calculate or otherwise determine the 'ideal' or 'proper' ratio to spec. for a mic input transfo.
From what (little) I know it has to do with input noise voltage of the tube used, I think. ???
I wondering about, really, the lowest ratio I can 'get away with' without penalty (other than the obv. of using a xfmr in the first place) since I don't really 'need' much gain from the transfo itself, just enough to give the tube what it wants to see/hear/feel/eat/etc in order for it to 'act right' in this situation.
I wish to have a mic input transformer made for a balanced tube preamp circuit (the circuit is done, works fine, uses four tubes per channel (I have cases!), two per +/-, provides appr. 60 db of gain, low output imp. and uses no output xfmr, I love it!).
Thank you for your thoughts...
Chris