I don't understand. If the center tap of the secondary is grounded, how can it be floating?
Are all your grounds in the schematic taken to the same point?
se
I'm with Sodacose on this one, I don't know how a winding whose center tap is grounded can be considered floating.
Sorry. Misread the schematic. I thought the headphone output was taken between the top of the secondary and the center tap and the bottom not connected. It's the headphone driver that will float.
Why is the secondary center tap tied to ground? Safety reasons?
se
Impedance goes as the square.
Derp!
The embarrassing thing is that I knew that. Just didn't follow it through. Just focused on there needing to be an equal number of turns on either side of the center tap.
Thanks for the smack upside the head.
se
Ok, good. I was thinking really hard about this for a minute there. Glad I'm not crazy.*
My apologies.
se
OK, that makes sense. How does the secondary charge up BTW? Capacitively?
Not having to ground the secondary center tap means there may be a lot more options for output transformers. BUT, now I'd be dividing the a2a by 4 instead of 2, right? So I'll have to find something with a fairly high primary z.
Thanks for the help, SY!
Not having to ground the secondary center tap means there may be a lot more options for output transformers. BUT, now I'd be dividing the a2a by 4 instead of 2, right? So I'll have to find something with a fairly high primary z.
Thanks for the help, SY!
CT or no will make no difference in the reflected impedance because you're not changing the relative turns ratio between primary and secondary. See, I'm full of good news today!
I've seen a few handwaving explanations of the charging, but haven't seen any data showing that it happens, much less the cause.
I've seen a few handwaving explanations of the charging, but haven't seen any data showing that it happens, much less the cause.
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