Narrow-Bandwidth Television Association

Posted: **Thu Jan 29, 2009 8:35 am**

I thought this article may be of interest to readers. Let me know if it should be posted in another part of the forum.

Thanks

Dave - KG6KGG

Posted: **Fri Jan 30, 2009 11:50 pm**

Two very useful posts Dave.

Rest assured they have been archived,

Regards,

Graham

Fresnel Lens Design Guide