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hello all
don't know if this is the right forum for this question but thought that i might start here.
what would be the ultimate core material for transformer construction. we're talking cost no object. pure iron? amorphous core? permendur?? i have heard of permedur in the ultimate
field coil? would this be an improper materiel for transformer?
Assume that i know nothing but enough to get my self in trouble.
thanks for your help.
xero
Follow Ups:
try this link
http://www.avat.com.au/
xero- i am also interested in my own transformers-here is a aussie site that sells transformer parts-i could not seem to find a US site-i watched my grandfather wind some when i was young-boy do i wish i had asked questions
http://www.avat.com.au/Mambo/index.php?option=com_content&task=section&id=9&Itemid=44
this link is broken
can you update?
thanks
e
n
here...
Peck around the site a bit and you'll find all kinds of usefull info about the topic.
thanks for the link. i will do some more research.
i do think that this is a black art. i would love
to get a better handle on this. it is the simple
things like c core or toroidal core ..... why would
one use one or the other. and, is Super Perma Nickel
the same as permendur used in feastrex field coil driver?
thanks again,
xero
Core material is just the tip of the iceberg for transformer manufacture. There is winding tension, insulation thickness, type of wire insulation and thickness, type of insulation material used between sections ( paper, plastic, and thickness, to boot.
Good luck
Stu
stu
thanks for further insight. this is one of the audio black arts.
does anyone know a master transformer builder / winder? enquiring
minds want to know.
xero
Most are made by factory workers on winding machines.
Rumors has it the transformers for the Marantz 9 were wound by one individual, who in turn got very egotistical about it. There are a couple of individuals hand winding transformers individually, check on the tubes website.
Stu
are you talking about the tube section of the asylum?
There is also the joelist on the internet, which caters to the true DIYers.
Again, there were, at one time, a couple of guys actually winding custom transformers there. As you state there is a certain art to winding and a lot of that is directly linked to the kind of sound you are searching for. You need to be very specific as to the tube type and the sound you are looking for for some of these winders to build you something that will suit your taste.
Bear in mind that most commercial manufacturers use off the shelf transformers with perhaps a few instructions ( ultralinear, tertiary windings, etc.). The exact nature of the windings are often left to the actual transformer manufacturer. In speaking to Mike Sanders of Quicksilver, he told me that he has spent years to develop an output transformer to his taste, and of course he was not about to share manufacture details with a PITA like me.
You may also want to research some of the vintage outputs. I've actually seen the engineering drawings for a Heath W-6 output, a very highly rated amp and IMHO one of the best of the vintage bigger power units. Magnequest, is supposed to have access to the working prints for many of the older Altec/Peerless transformers and such, many of which are considered classics ( the 20/20 series, in particular).
If you have friends in Hong King, I seen and heard rebuilt transformers, where they take old iron and carefully disassemble and rewind the cores as best they can to the original specs. Might be interesting to see what they observe.
Stu
I would call a place that specializes in making power supplies- even non-audio.
I have called many small and large manufacturers of pigments, electronics and adhesives. You may be very suprised on how willing the experts are to help the hobbyist with questions like this. I would be sure to state that this is for personal use- so they won't think you may be after proprietary information.
Normality frightens me- its what they use to lure you into the cookie cutter.
Roger
Edits: 01/27/11
Spending for more than M6 is kind of a waste for an AC power transformer. After that, you are down to an expensive $ to weight calculation.
Audio output transformers are a different beast in that you have frequency response to deal with. Nickel and Cobalt are pretty cool in output and interstage audio transformers.
___
Long Live Dr.Gizmo
sorry, i should have been more specific. while i would not consider using permunder for a power transformer i thinking more in terms of using permunder based transformer as coupling transformer.
does anyone make transformers using this material?
thanks again
xero
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