Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Toriod identification  (Read 270 times)
LA3AKA
Member

Posts: 30




Ignore
« on: November 20, 2008, 02:48:28 AM »

I have a couple of toroids laying in my junk box.

They are labeled G34Z 121 P640, and made by Genalex, England. OD=40mm ID=26mm

Are these useful for HF application? I'm thinking to maybe use them in an antenna choke balun.


73 de LA3AKA
Logged
G8JNJ
Member

Posts: 473


WWW

Ignore
« Reply #1 on: November 20, 2008, 05:02:27 AM »

Hi,

I supect they are MPP material which is not suited for RF applications.

A quick google gave this link.

http://www.sailcrestmagnetics.com/products_powder_gn.htm

Regards,

Martin

www.g8jnj.webs.com
Logged
G3RZP
Member

Posts: 4370




Ignore
« Reply #2 on: November 20, 2008, 08:54:28 AM »

Genelex was the trade name for ferrite materials made by Salford Electrical instruments, which was part of the General Electric Company (GEC) - not to be confused with the US GE. All long gone, of course.

What colour are the toroids? If they are red, they are high permeability ferrite, and can be used in transformers, certainly up to 4MHz. They also have a relatively low Curie point. A lot depends on what you want to use them for.

73

G3RZP
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!