Anyone know of a US source for ESL toroids?

[mavric]

My conculsion would be that the more surface area of the wire or winding, would be stable at high voltage. I know currunt flows around the wire and not thru it, so to me, that cheaper coil may be more efficient. But the load would be compramised, i believe there would be more resistance using the cheaper coil. just some thoughts.

[joojoo1234]

Calvin... you have got me ordering two of these

http://www.antekinc.com/details.php?p=33

You have mentioned 6v and I read someone else say minimum 25v... he was probably talking full range?? Regardless I will get either the 25v or 6v 50va. Always remember regarding math and electronics I never know what the help I am talking about. Merely typing and ordering...

[SM7UYJ]

With 25V sec. you get 230/25 = 9.2, using two toroids you get a teoretical transformation ratio 1:18 - unfortunatly way to low!

With a 6V trafo you would get 230/6 = 38.3, two toroids => 1:76

So using the 25V version trafo, you will need 8 toroids to get abt. the same transformation ratio as using two 6V!

/Roger

[CharlieM]

Originally Posted by joojoo1234

Calvin... you have got me ordering two of these

Antek - AN-0525

You have mentioned 6v and I read someone else say minimum 25v... he was probably talking full range?? Regardless I will get either the 25v or 6v 50va. Always remember regarding math and electronics I never know what the help I am talking about. Merely typing and ordering...

For hybrid ESL's, I recommend a pair of these trannys driving each panel:
http://www.antekinc.com/details.php?p=27

[Calvin]

Hi,

the theoretical U is N1/N2 or V1/V2, which gives 1:76 for a 6V/230V pair.
Connected in parallel on the 6V-side and in series on the 230V-side.
In praxis You need to include the efficiency of the tranny, which is typically around 90% in the required wattage-class.
So the effective U would be 1/(76x0.9) ~ 1:68.

jauu
Calvin

[joojoo1234]

Never order anything until I talk to you all. Luckily I waited as I was about to order the 25v version...

[joojoo1234]

Originally Posted by SM7UYJ

With 25V sec. you get 230/25 = 9.2, using two toroids you get a teoretical transformation ratio 1:18 - unfortunatly way to low!

With a 6V trafo you would get 230/6 = 38.3, two toroids => 1:76

So using the 25V version trafo, you will need 8 toroids to get abt. the same transformation ratio as using two 6V!

/Roger

Later. Okay, thanks!

[joojoo1234]

Originally Posted by CharlieM

For hybrid ESL's, I recommend a pair of these trannys driving each panel:
Antek - AN-0506

just tell me what to do.

Going to order a variable low power high voltage supply prebuilt. Know enough to do that I believe on my own.

I think I need a high voltage multiplier... found those on ebay. Some resistors high voltage.... well do me a favor... I will stay at this thread and update it with what I bought or thinking about buying.

[joojoo1234]

What is this update boxes thing on the antek order site? That is strange.

[joojoo1234]

Well I ordered 8 of those AN-0506 transformers. i have spare metal and family. As I am still learning I am forced to ask this question. If I use 3 of those per speaker would it be enough to drive a full range... say to 100-150 mhz if I should decide to do a design like that later?