Hi all, I like to inform you that Martein Bakker, PA3AKE, has updated his web page reporting his measurement on the H-Mode Mixer. The update is relative to measurement done on the I7SWX 2T H-Mode Mixer using the FSA3157 and the original 2T version with Pericom PI5C3125 fast bus switch.
A major comment reported by Martein on the 2T HMM version with FSA3157 is: "2 transformer version is an interesting branch in H-Mode mixer development. Most impressive is the spur reduction possible with home made transformers with this configuration in combination with the FSA3157 switches." PA3AKE web page is: http://www.xs4all.nl/~martein/pa3ake/hmode/ Below is reported the Contents list of all measurements done and comments reported by Martein. I am sure all those that have visited and will visit his page will find one of the most complete reports done on the important H-Mode Mixer developed by Colin Horrabine, G3SBI. 73 and enjoy the reading Gian I7SWX H-Mode mixer Overview Contents 1. Introduction 2. IP3 measurement / limitations o Signal Generators and Hybrid Combiner o Post Mixer Roofing Filter o Pre Mixer Band-pass Filters o Mixer Transformers 3. Fairchild switches o FSAV430 o FSAV450 o FSAV330 o FSAV332 o FST3125 o NC7SZ384 o FSA3157 o FSA3157 + 74AC04 4. Mini-Circuits transformers o TT4-1A o T4-1 o ADTT4-1 o T1-1T o ADTT1-1 o ADTT1-6 o ADT1-6T o TT1-6 o T1-6T o ADT1-1WT 5. Homebrew transformers o FT37-43 toriod o BN43-2402 2-Transfomer H-Mode mixer 6. Mixer symmetry 7. Conclusion 8. Acknowledgments 9. Appendix AD9951 DDS spurs on 15M
