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Where to get iron core -- Fe/Si?
Where to get iron core -- Fe/Si?
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Old 18th February 2012, 04:32 PM   #1
John Bessa is offline John Bessa  Canada
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Default Where to get iron core -- Fe/Si?

I am getting the idea that if you build your own transformers, then you can make better amps because you can give the tubes, etc the exact required voltages.

But where to get less that 10 tons of laminates at a time?

(plus, and ideas about ferrite cores having the same magnetism, or permeability, as fe/si, please post because ferrite seems to be more available)

Last edited by John Bessa; 18th February 2012 at 04:41 PM.
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Old 20th February 2012, 08:54 PM   #2
John Bessa is offline John Bessa  Canada
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heh, no ideas?
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Old 20th February 2012, 09:06 PM   #3
nigelwright7557 is offline nigelwright7557  United Kingdom
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Quote:
Originally Posted by John Bessa View Post
I am getting the idea that if you build your own transformers, then you can make better amps because you can give the tubes, etc the exact required voltages.
That isnt true.

I always use off the shelf components and never had any problems.
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Old 20th February 2012, 09:53 PM   #4
jcx is online now jcx  United States
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it isn't that hard to find smaller regional manufacturers that do custom - I'd much rather pay them as little as 2-3x the standard part cost in many cases for exactly what you want

the biggest issue in power supply transformers is that “standard” parts push Bmax – the least iron, copper they can ship means the most profit
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Old 20th February 2012, 10:05 PM   #5
Parasonic is offline Parasonic  United States
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Agree with Nigelwright, but add that winding your own components is a complex undertaking, and requires a lot of skill & patience. Even so, you may do a lot of work and still not end up with a better wound component as Nigel has said. You may however end up with an outstandingly good transformer, but study, many repetitions of building components and experience will be the best teacher. I would never discourage someone from trying.
I am not sure where to locate larger ferrites, but you can try:

Thomas and Skinner

for laminations. T&S have sold me a few pounds at a time in the past.

Good luck

Terry
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Old 20th February 2012, 10:29 PM   #6
iko is offline iko  Canada
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Where to get iron core -- Fe/Si?
Quote:
Originally Posted by John Bessa View Post
I am getting the idea that if you build your own transformers, then you can make better amps because you can give the tubes, etc the exact required voltages.

But where to get less that 10 tons of laminates at a time?

(plus, and ideas about ferrite cores having the same magnetism, or permeability, as fe/si, please post because ferrite seems to be more available)
Here, small quantities and reasonable prices, m4-011 c-cores.

C-cores Stock
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Old 21st February 2012, 01:52 PM   #7
John Bessa is offline John Bessa  Canada
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thanks ikoflexer for a useful answer -- there are plenty of pages, youtubes, etc showing exactly how to do it, if you can wind a fishing line and work on tube amps, you can certainly build an xformer

Last edited by John Bessa; 21st February 2012 at 02:00 PM.
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Old 21st February 2012, 02:00 PM   #8
John Bessa is offline John Bessa  Canada
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these look good -- but not E-cores, they are C-cores -- how do you wind a C-core, will it work? I have never seen an amp w/ C-cores.

Click the image to open in full size.

Looks like a (socialist) government will have to mandate E-cores...
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Old 21st February 2012, 02:36 PM   #9
Fusor is offline Fusor  United States
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Where to get iron core -- Fe/Si?
Surplus Sales of Nebraska ferrite E cores and bobbins
Ferrite: E Cores
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Old 21st February 2012, 02:49 PM   #10
simon7000 is offline simon7000  United States
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Quote:
Originally Posted by John Bessa View Post
these look good -- but not E-cores, they are C-cores -- how do you wind a C-core, will it work? I have never seen an amp w/ C-cores.

Looks like a (socialist) government will have to mandate E-cores...
First you wind your turns on the bobbins. These can be mounted to a motor for easier winding just be sure the wire feed spool is 30 times the bobbin length away for smooth winding. Then after the bobbins are wound you glue the cores to each other. (If i have to tell you to place the bobbins on before you glue the cores, you might want to reconsider the project!)
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