by Brewster LaMacchia | May 25, 2018 | Audio, Testing
This is the long delayed followup to the earlier post about power resistors as dummy loads and the nonlinearities found. After some further experimentation an 8 ohm load was built from four Riedon PF2270 series 2 ohm 200W thin film resistors (to give an 8 ohm load)...
by Brewster LaMacchia | Feb 21, 2018 | Design, Testing
Performing some tests on a prototype circuit with an Audio Precision AP515 it was noticed that a particular power resistor showed an unexpectedly high amount of distortion, almost 0.5% THD+N. Four of them were hooked up in series to provide the desired value, and the...
