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
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