Re: Drafted to helo a friend who designs audio amps
¿ªÔÆÌåÓýHafler, an amplifier engineer/manufacturer came up with a very clever and simple test procedure: Divide down the output with two resistors and sum it with the input signal also using two resistors. If the two signals are 180¡ã out of phase, tweak the resistor ratio so there is no output. Monitor with a scope, headphones ¡¡ Play music through the amp.? If there is any output, it is distortion created by the amplifier. Test with different types of loads. If the signals are in phase, add an inverter to the input signal. ? He demonstrated that most big-name amplifiers had transient intermodulation that never showed up on the specifications and often not understood. His amplifiers were ¡°clean¡±. See: Bertho ? From: [email protected] <[email protected]> On Behalf Of wn4isx via groups.io
Sent: 7 December, 2024 8:08 To: [email protected] Subject: [electronics101] Drafted to helo a friend who designs audio amps ? I've been dragooned to help a friend I've known since the second grade. Jimmy designs and builds ultra high end audio systems, he builds everything up to the speakers. ? |
Bertho