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Author Topic: Where to buy a stock of cores for experimenting?  (Read 2208 times)
NU9J
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Posts: 109




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« on: May 26, 2013, 01:15:26 PM »

Only a month or two ago, I bought some VHF toroids from Palomar Engineers. They had a huge list of cores and mixes along with the frequency ranges for different applications. I was going to buy some cores suitable for HF for inductors and transformers from them, but the website has changed, and now it looks like they are only listing 4 cores and 3 mixes? Don't see a "contact" page to directly ask them, so I ask you:

Where can I buy a set of commonly-used cores for inductors and transformers for 1-30 MHz for tinkering?
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~Philip
VK2TIL
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Posts: 318




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« Reply #1 on: May 26, 2013, 02:05:10 PM »

DIZ is your man;

http://www.kitsandparts.com/

Fast service and low prices.

Some iron-powder (2 & 6) and some ferrite (43) in 37 and 50-size toroids will get you started.
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KE3WD
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Posts: 5694




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« Reply #2 on: May 26, 2013, 02:24:26 PM »

Fair-Right Products has been my main source for all things ferrite, including information. 

http://www.fair-rite.com/newfair/index.htm

They've been at it for over 50 years.


73
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VK2TIL
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Posts: 318




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« Reply #3 on: May 26, 2013, 05:38:15 PM »

Speaking of Fair-Rite, their catalogue is a mine of information on ferrite (although not on iron-powder).

The catalogue may be downloaded from their website.

Micrometals have some data on iron powder; see their website for "Iron Powder Core Selection For RF Power Applications".

And, to take the drudgery out of calculations, try DL5SWB's excellent calculator;

http://www.dl5swb.de/html/mini_ring_core_calculator.htm


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KA4POL
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Posts: 1969




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« Reply #4 on: May 26, 2013, 09:37:15 PM »

I have very good experience buying from Amidon: http://www.amidoncorp.com/
They even ship world wide.
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KE3WD
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Posts: 5694




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« Reply #5 on: May 27, 2013, 06:15:18 AM »

Yes, Amidon is another good source that I would recommend without reserve. 

About CATALOGS --

The aspiring electronics experimenter can learn quite a bit from ordering and perusing various electronics parts catalogs. 

Many of them have a lot more than just parts and prices in them, they also have good reference information, charts, graphs, guides on how to select a component for a particular task, formulas, sometimes even recommended "cookbook" circuit data as well. 

And the modern "paperless office" situation works well also, the downloading of not only the main catalogs, but flyers, addendums, datasheets, even projects using a company's products is fast and easy to do. 

Pouring over the catalogs is what separates the geeks from the boys. 

Good Reading,


73
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