[hpsdr] NOT HPSDR - PA3AKE H-MODE MIXER MEASUREMENT UPDATE

[Giancarlo Moda]

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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