You're probably right....
but these toroids are second hand, and I don't think I could find such high quality as such low price so easily.
I especially liked the fact that they are sealed, which is rare and that I was like for low hum....
Nevermind... I found another pair of quality toroids
(but a bit more expensive and not sealed... )Thanks!
You can only connect transformer primaries in series when the secondaries have identical loads, or are tightly coupled together (usually by being wound on the same core!). Identical loads is almost impossible to achieve: you need not just identical circuits taking identical currents, but also identical smoothing caps (note that big electrolytics usually have very loose tolerances). This balance needs to be maintained under all conceivable fault conditions.
Paralleling secondaries should only be attempted when they are on the same transformer or with ballast resistors to aid current sharing.
The quick answer, as others have said, is don't do it!
Paralleling secondaries should only be attempted when they are on the same transformer or with ballast resistors to aid current sharing.
The quick answer, as others have said, is don't do it!
You're probably right....
but these toroids are second hand, and I don't think I could find such high quality as such low price so easily.
I especially liked the fact that they are sealed, which is rare and that I was like for low hum....
Nevermind... I found another pair of quality toroids
Thanks!
and if it works okei. the transformers will be 337VA/2 pr pc.
so 168.5VA pr transformer
Not quite. The transformers will still be at rated power but the drawn power will be as you suggest.
one does not mix up windings on different transformers.
There are better ways to reduce the output voltage than mixing up primary windings.
I have described the method previously and I can confirm that method does not lose any VA rating of the secondaries. But the description does have a warning. It is not for beginners who cannot recognise the dangers inherent in mucking about with mains transformers !!!!!!!!!!!!
There are better ways to reduce the output voltage than mixing up primary windings.
I have described the method previously and I can confirm that method does not lose any VA rating of the secondaries. But the description does have a warning. It is not for beginners who cannot recognise the dangers inherent in mucking about with mains transformers !!!!!!!!!!!!
What KatieandDad says!
Check out this inexpensive Antek: Antek - AN-3218 Even with shipping it should not be too bad.
What KatieandDad says!
Check out this inexpensive Antek: Antek - AN-3218 Even with shipping it should not be too bad.
Yeah not bad...... hee hee
But I could have had 2 sealed Avel-Lindberg for even cheaper than that.... so I was tempted.
I didn't see the issue when used in perfectly parallel channels in CLass A, but I guess the argument about caps tolerence has finished convincing me
no it will not. the amp rating remains the same.
but voltage is only half. so you loose 50% VA rating.
True. And this is because the amp rating is driven by wire gauge.
You still get the same "rating" for the core though... so it's like an oversized core....
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