After long searching, I've found two interesting paper on Audio Output Transformer by Crowhurst. If somebody interested, these papers can be downloaded from:
http://213.156.45.208/primo/materiale/20_030_040_001_crowht_outtrafoI.pdf
http://213.156.45.208/primo/materiale/20_030_040_001_crowht_outtrafoII.pdf
The first article reports as reference a previos article that I'd like to have but seems very hard to find:
Crowhurst "How good ias an audio transformer?", published in Audio Eng., March 1952
Has somebody this last paper?
Thank You
http://213.156.45.208/primo/materiale/20_030_040_001_crowht_outtrafoI.pdf
http://213.156.45.208/primo/materiale/20_030_040_001_crowht_outtrafoII.pdf
The first article reports as reference a previos article that I'd like to have but seems very hard to find:
Crowhurst "How good ias an audio transformer?", published in Audio Eng., March 1952
Has somebody this last paper?
Thank You