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#1
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Trying to find out what Ferrite material this is.
I came across two ferrite toroids with the measurements of 35mm
diameter, the hole in the middle is 21mm and it is 13mm thick. On the packet it says that the ferrite material is L15. Does anybody know if L15 is equivalent to 43 or 61 ferrite material? I have searched the net but have been unable to find any information. Any information would be appreciated. Cheers. |
#2
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Trying to find out what Ferrite material this is.
wrote:
I came across two ferrite toroids with the measurements of 35mm diameter, the hole in the middle is 21mm and it is 13mm thick. On the packet it says that the ferrite material is L15. Does anybody know if L15 is equivalent to 43 or 61 ferrite material? I have searched the net but have been unable to find any information. Any information would be appreciated. Cheers. Where did they come from? Sounds like it may have been from a kit. Charlie. -- M0WYM www.radiowymsey.org |
#3
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Trying to find out what Ferrite material this is.
wrote:
I came across two ferrite toroids with the measurements of 35mm diameter, the hole in the middle is 21mm and it is 13mm thick. On the packet it says that the ferrite material is L15. Does anybody know if L15 is equivalent to 43 or 61 ferrite material? I have searched the net but have been unable to find any information. Any information would be appreciated. Cheers. Here's how to check them: http://www.w8pgw.org/node/303 Charlie. -- M0WYM www.radiowymsey.org |
#4
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Trying to find out what Ferrite material this is.
I haven't got an antenna analyser to do the above checks. The toroids
came in a box of stuff from a hamfest. They are in a packet which has the brand name "Duratech" printed on it. |
#5
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Trying to find out what Ferrite material this is.
wrote:
I haven't got an antenna analyser to do the above checks. The toroids came in a box of stuff from a hamfest. They are in a packet which has the brand name "Duratech" printed on it. If you have any means at all of mesuring inductance, you can go he http://en.wikipedia.org/wiki/Inductor Inductor - Wikipedia, the free encyclopedia Find the formula (#6) for the inductance of a toroidal ring. Enter the appropriate values and solve for u (permeability of the core). Then look at ferrites and iron power core properties with the calculated permeability at the test frequency. You'll probably find several core materials that fit. I think that's about all that can be done. Chuck ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#6
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Trying to find out what Ferrite material this is.
On Fri, 01 Jun 2007 11:03:30 -0700, wrote:
I haven't got an antenna analyser to do the above checks. Do you have a SWR meter? 73's Richard Clark, KB7QHC |
#7
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Trying to find out what Ferrite material this is.
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#8
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Trying to find out what Ferrite material this is.
Owen Duffy wrote in
: .... Search Jaycar's site for a LO1238. If that is what you have, you could ask them for data. I should have added that I think it is similar to the L8 material described in their data sheets. I have a vague recollection of measuring the inductance of a winding on the material, and I think the ui was around 1500 which suggests it is low loss up to a few hundred kHz, perhaps to 1MHz or so. Owen |
#9
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Trying to find out what Ferrite material this is.
Hello Owen,
I have tracked the product down to Jaycar but they don't know anything about the material. The person I contacted was very vague and couldn't steer me towards anybody that would know what material it was. All I want to know is if the toroids would be any good for HF 1:1 baluns. I have just made a balun using a FT-140-61 which is very close to the same dimensions as the 2 toroids in the Duratech packet. If they can be used they are a fair bit cheaper than sourcing FT-140-61 toroids. In reply to Richard Clark, yes I do have a SWR meter. Cheers Max |
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