Hi Bill, The 36 page info I mentioned is on the HBR website. It is 36 pages of HBR notes written by Ed Kent K8ENL. There is a ton of notes and recommendations on the HBR circuitry, coil winding, etc... The URL is: http://www.qsl.net/k5bcq/Doc1/ It does take a bit of time to get at it but its worth it! 73, Scott WA9WFA