What chokes are you using?

 

Well many different type’s it’s all depending what you will used them for.

I have some commercial ones in use, they are not cheap they called CMF-5000 from Diamond. I have no shares if you buy one and its not to promote that kind of chokes. There are other and maybe better ones.

ON7FU is also very good.

 

Good to know is "measuring is a must on chokes”, I will explain on this site soon…..

 

Some links to other sites.

https://www.on7fuferriteapplications.com/

http://www.karinya.net/g3txq/chokes/

Some nice explanation with PowerPoint on chokes.

http://www.ifwtech.co.uk/g3sek/in-prac/index.htm

What kind of toroid I am using on the 20m 4SQ

 

I am using A T225-2B.

More info on this system  you will find on this link.

http://sj2w.se/shop/?product=4-sq-pcb-so239n

http://www.egloff.eu/index.php?option=com_content&view=article&id=4&Itemid=136&lang=en