Doesn't the K3KU circuit in the CT manual also handle grid-block keying? - Jim -- Jim Reisert AD1C <jjreisert@alum.mit.edu> http://people.ne.mediaone.net/ad1c/ -- Submissions: ct-user@contesting.com Administrative requests: ct-user-REQUEST@contesting.com WWW: http://www.k1ea.com/ Questions: owner-ct-user@contesting.com