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previous: Graywater Hey Steve,Output tr... -- 2/3/2000 11:51 PM

Re: SE operation and speaker behavior

2/4/2000 1:16 AM
SteveR	Re: SE operation and speaker behavior GW, Thanks for your response. That makes things very clear. I'd forgotten how a transformer does its stuff. I guess I was erroneously thinking that the "amount" of magnetnetic field generated by the primary translated into "position" of the secondary, and that there was a direct correlation then between current in the primary and position in seconday. But you reminded me that, instead, it's the CHANGE of magnetic field (caused by voltage and current changes in primary) that generates current in the secondary (which transfers into position in a manner of speaking, but really)which translates into MOTION in the speaker coil. Whoa. I find this kind of trippy if I think about it too long. Very cool. Thanks again. Also, is it true that as long as the inverted channel was not WITHIN the loop then I'd be OK? My sense is that as long as the FB is negative with respect to the stage where it's inserted then whatever happens prior to the loop in the circuit should not create oscillation. My project isn't going to have feedback anyway, so this is all just musing... I guess I was wondering if there were any other considerations regarding phase I should be aware of. Take care, SteveR

2/4/2000 1:16 AM

SteveR

Re: SE operation and speaker behavior

GW,

Thanks for your response. That makes things very clear. I'd forgotten how a transformer does its stuff. I guess I was erroneously thinking that the "amount" of magnetnetic field generated by the primary translated into "position" of the secondary, and that there was a direct correlation then between current in the primary and position in seconday. But you reminded me that, instead, it's the CHANGE of magnetic field (caused by voltage and current changes in primary) that generates current in the secondary (which transfers into position in a manner of speaking, but really)which translates into MOTION in the speaker coil. Whoa. I find this kind of trippy if I think about it too long. Very cool. Thanks again.

Also, is it true that as long as the inverted channel was not WITHIN the loop then I'd be OK? My sense is that as long as the FB is negative with respect to the stage where it's inserted then whatever happens prior to the loop in the circuit should not create oscillation. My project isn't going to have feedback anyway, so this is all just musing... I guess I was wondering if there were any other considerations regarding phase I should be aware of.

Take care,

SteveR