interleave transformer

[C Moore]

I searched message title for "interleave"...and got Zero results.
I am not exactly clear on what an Interleave Winding on an OT is.

I thought it was a way to try to even the DC Resistance of the Primary, on each side of the CT...

But anyway.....is there a link that explains what is meant by, and what is the procedure for..... Interleave.?
Thank You

[ToneMerc]

I searched message title for "interleave"...and got Zero results.
I am not exactly clear on what an Interleave Winding on an OT is.

I thought it was a way to try to even the DC Resistance of the Primary, on each side of the CT...

But anyway.....is there a link that explains what is meant by, and what is the procedure for..... Interleave.?
Thank You

http://www.dave-cushman.net/elect/transformers.html

http://www.electrical4u.com/core-of-tra ... rmer-core/

TM

[tubeswell]

Interleaving is where you wind part of the primary and then part of the secondary over the top, then another part of the primary over the top of that and then another part of the secondary over the top of that etc etc (instead of just doing one complete winding and then another over the top). The greater the numbers of primary and secondary interleaving the better the high frequency response. However a physicaly large transformer has increased capacitance between windings which causess phase shift and restricts the high frequency response. A smaller tranny with less turns favours the high frequency response.

[C Moore]

Interleaving is where you wind part of the primary and then part of the secondary over the top, then another part of the primary over the top of that and then another part of the secondary over the top of that etc etc (instead of just doing one complete winding and then another over the top). The greater the numbers of primary and secondary interleaving the better the high frequency response. However a physicaly large transformer has increased capacitance between windings which causess phase shift and restricts the high frequency response. A smaller tranny with less turns favours the high frequency response.

I was going to ask...what does that accomplish.?
I see the answer your quote, but not (at first) in your post.....

Oh...OK.....I see there is Interleave of the lams, where they join. Then there is also Interleave Winding...which is what I was wondering about.....the windings.
Thanks

[Cantplay]

Mcintosh commonly wound their trafo this way. I think it was to try to get more range.

John

[Phil_S]

Here is an example, the winding instructions for a Marshall 18 Watt.

[tubeswell]

Interleaving is where you wind part of the primary and then part of the secondary over the top, then another part of the primary over the top of that and then another part of the secondary over the top of that etc etc (instead of just doing one complete winding and then another over the top). The greater the numbers of primary and secondary interleaving the better the high frequency response. However a physicaly large transformer has increased capacitance between windings which causess phase shift and restricts the high frequency response. A smaller tranny with less turns favours the high frequency response.

I was going to ask...what does that accomplish.?
I see the answer your quote, but not (at first) in your post..... ...

Thanks because I'm usually so busy that I frequently just post a few words in response to a question and then realise afterwards that I should've provided more explanation and so I go back and add to it.

[katopan]

Just to add to what's already been said, winding interleaving is normally done to extend the top end frequency response. Different interleave patterns achieve this to different lengths. They also can have the side effect of balancing up DC resistance and in fact balancing up the magnetic coupling too, but that also depends on which interleave pattern is used. Not all the interleave patterns used are more balanced, and some are quite unbalanced. That is also done on purpose sometimes.

[C Moore]

.......... That is also done on purpose sometimes.

Funny you should say -
A few years back (I think I posted here when I did it...I should look for it) I worked on a friends Soldano HR50+.
It had a blown cat resistor and needed new tubes.
I was Ohming ( is their a correct term) the OT to bias the new power tubes and found it to be Way Lopsided where DC Resistance is concerned...I want to say about 75 Ohms.
I got hold of Soldano (I think the guys name was Bob) and he said that Mike had designed the OT that way.
As a matter of fact, they still had the prototype. They measured it and it was almost exact to what I was getting from the amp I was working on.
So you are correct. Some companies (good companies) do that with intent to create a certain "mojo" in some of their builds.
Thanks For The Info