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Op Amp Labs Transformers
On Sunday, March 4, 2018 at 7:49:09 PM UTC-5, Phil Allison wrote:
wrote: -------------------------- I'm particularly interested in how badly they ring. What causes an audio transformer to ring? 60Hz transformers hum, ** A lot of force comes from the 60Hz supply acting on anything magnetic with a bunch of wire wound around it. This is single, low frequency, forced vibration, not resonance. You know, in AC solenoids a shorting ring is beneficial to keep 60 Hz buzzing to a minimum, as the shorting ring provides a CEMF!!!! Jack so at the right audio resonant frequency, I guess the core could resonate and ring, physically!! ** The sort of ringing being referred to here happens at high audio and supersonic frequencies - needs test gear to see. Folk fuss about it cos it indicates non flat response. ..... Phil |
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