Hi Jeff, congratulations on your work with Rife to date - I had read your recent work on the Rife frequency generator and have moved forward in building the no. 4 equivalent that you mention in the report. I have a very experienced broadcast engineer here in Cyprus that I am working with and he is presently in the process of building this but had some questions, as follows: 1. What equivalent values have you used for the tubes V3 and V4? This is for the Gruner schematic 1951. 2. There are two audio transformers - he wants details of these with full descriptions. We are excited to be building a unit that is as close to Rife's original work as possible and have already began building a Faraday cage or RF screening room as part of my Centre - www.docgeorge.com Your help in this would really be appreciated Jeff. Thanks! Best regards, George Dr. George J Georgiou __________________