GoranB .. you (I) can still hear 2nd and 3rd harmonics of the highest piano key.
The good thing is that I cant hear the highest unpleasent harmonics produced from my wife when im soldering and testing audio equipement
Just for interest,
Ambient temp in your area / room can change the inrush current on heaters. Just one of my experiences. Playing with 12AX7 struggled to get Lm reg to start so put in a resistor that only just got it up and running (sun shining on my project) with a shorting relay this was tried with new cold tubes so no residual heat from start. Next morning- would not start had to alter the time and resistance value! My point is the warmer the tube from ambient the easier it is to start.
Regards
M. Gregg
Ambient temp in your area / room can change the inrush current on heaters. Just one of my experiences. Playing with 12AX7 struggled to get Lm reg to start so put in a resistor that only just got it up and running (sun shining on my project) with a shorting relay this was tried with new cold tubes so no residual heat from start. Next morning- would not start had to alter the time and resistance value! My point is the warmer the tube from ambient the easier it is to start.
Regards
M. Gregg
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