Where to get permalloy laminations?

[sponzorb]

I want to wind some mic input transformers, which calls for some of that high permeability / low coercivity permalloy goodness.

Where do you find these though? I’m not getting much luck searching for them. Is there a source for these that people rely on?

 

[sponzorb]

Anybody?

 

[petermontg]

unfortunately getting a supplier to supply such a low amount for a small run is next impossible. I also need a small amount so I can get some trafos wound, as my trafo guy cant get them also.

 

[sponzorb]

Hmm, maybe some of us could go in on a larger order together?

 

[gyraf]

..you'd have to agree on a common type/size..

 

[CJ]

Neve style, 50/50, good for line in, not so much mic in, 2.2 lbs at about 120 US , dual coil design,

https://www.ebay.com/itm/143303424075?itmmeta=01HXXGSYGJAFAXD12MJM4MXVM2&hash=item215d8cb84b:g:gj8AAOSwk0tdDOYc&itmprp=enc:AQAJAAAA0C9BjzwQQfzwQAulWg/xg1SU1rJeIHwKRo4ioxExpTfBpYgCq9XdNmNBC2/mi8k2EhikXZTpQ9+fBbk6MgUzb3xjOuTFv2yr8r03YpZ1ukQ17et8yFyUJ3Hr36V/2yZ2M9yoS7DC8+TWQBERJ7yPLN2kfQbIqtGk4HhGhR+fTz7gvrAYA8XIRvz7ajGOdg+GAlO89y7X92qv6mosappm1KUVtH6/9Bk5+0W6jHMV0PuOwmY5yW56NcJ4ZVkO/67wy3gJpK28dEAnUmUfnCN1p/E=|tkp:Bk9SR67o57DvYw

 

[CJ]

Hi octane, good stuff from Korea,Lams

 

[CJ]

Smaller hi octane, good for a few, too expensive for production runs,

https://www.ebay.com/itm/3343403316...3fh4IMEpuvIDU1gYjJWEFupSKE|tkp:Bk9SR-zW1bHvYw

 

[CJ]

Other items from seller

https://www.ebay.com/sch/i.html?_ss...ctronics&_oac=1&_trksid=p4429486.m3561.l49496

 

[sponzorb]

CJ you are a god

 

[sponzorb]

I found a potential lead in the US.

ESPI Metals https://www.espimetals.com/index.php/technical-data/175-permalloy-80

They can do permalloy 80 lams. They have sheets of 0.014in thickness, and can cut them into lams based on technical drawings. I haven't gotten a quote yet, but they said there's no minimum, although cost is expectedly higher for small orders. I think I'll draft some EI and UI lam drawings and get a quote soon.

 

[beatnik]

Good news, keep us informed what kind of pricing they are asking

 

[Dylan W]

I found a potential lead in the US.

ESPI Metals https://www.espimetals.com/index.php/technical-data/175-permalloy-80

They can do permalloy 80 lams. They have sheets of 0.014in thickness, and can cut them into lams based on technical drawings. I haven't gotten a quote yet, but they said there's no minimum, although cost is expectedly higher for small orders. I think I'll draft some EI and UI lam drawings and get a quote soon.

Would they have to be reannealed after cutting?

 

[sponzorb]

Would they have to be reannealed after cutting?

Yeah, they need to be reannealed.

I did some more research:

These are some of the many names the 50% and 80% alloys go by:

50% nickel : High Perm 49 / Alloy 50 / ASTM A753 ALLOY 2

80% nickel : MuMetal / A753 Alloy 4 / N14411C Composition 1 / Alloy 79 / Permimphy / Magnifer 790 / HyMu 80

It’s a lot easier to search with some of those names.

I contacted these companies

Carpenter Electrification

https://www.carpenterelectrification.com/contact

Arnold Magnetics

https://www.arnoldmagnetics.co.uk/thank-you/

ARM

https://www.refractorymetal.org/sheets-plates/

Vulcan Metal Group

https://vulcanmetalgroup.com/hymu-80/

I’ll let you know what I hear

I’m wondering if a different company will have to anneal the metals after buying cut sheets from on of the above, but i’ll keep the thread updated

 

[opacheco]

Yeah, they need to be reannealed.

I did some more research:

These are some of the many names the 50% and 80% alloys go by:

50% nickel : High Perm 49 / Alloy 50 / ASTM A753 ALLOY 2

80% nickel : MuMetal / A753 Alloy 4 / N14411C Composition 1 / Alloy 79 / Permimphy / Magnifer 790 / HyMu 80

It’s a lot easier to search with some of those names.

I contacted these companies

Carpenter Electrification

https://www.carpenterelectrification.com/contact

Arnold Magnetics

https://www.arnoldmagnetics.co.uk/thank-you/

ARM

https://www.refractorymetal.org/sheets-plates/

Vulcan Metal Group

https://vulcanmetalgroup.com/hymu-80/

I’ll let you know what I hear

I’m wondering if a different company will have to anneal the metals after buying cut sheets from on of the above, but i’ll keep the thread updated

Dear sponzorb,

What do you got from these companies?
We will appreciate any news you have of them in order to buy some laminations for DIY transformers.

I will be pending of your comments
opacheco

 

[sponzorb]

Dear sponzorb,

What do you got from these companies?
We will appreciate any news you have of them in order to buy some laminations for DIY transformers.

I will be pending of your comments
opacheco

Hey I didn’t end up pursuing any of these, so I don’t have any more info.

 

[opacheco]

Hey I didn’t end up pursuing any of these, so I don’t have any more info.

That sound so sad!…
Do you have the idea in order to do yours DIY transformers still? I am in this way too but it have done very difficult to get Mumetal EI-48 laminations and its bobbins neither!

Thanks
opacheco