Tested with 200V wired for 234. I have small changes of voltage, I tried with 195V but sometimes mains voltage lowered and I was told that the signal worsened.
So I leave for 200VAC in reception. The variac is 500VA, so a small drop of 3V is normal.
Now PS and PA have similar temperatures in normal use, and cooling fan stops some 3 minutes after a long transmission. The PS temperature stabilises in 41?C (22?C in room) and the fan never comes in reception.
Having lower AC voltage in the PS has another advantage. The conducting cycle in the rectifier is longer, needed to smaller difference in voltage between input and output to capacitors. As the power is R x I2 (squared) if the rectifier conduct double the time at half the intensity for the same Culombs to charge capacitors, the power dissipated if rectifier halves. And at full power (12A) the difference may be 5/7W less in rectifier (1,2V loss)
Adding all it may come close to 70W less in transmission. A difference. Main advantage is for the PS.
73 EA1FC
