complete (2)02
BuiltWithNOF
Design

QSD-QSE board provides a receiver and transmitter based on using the FST3126 switches. In addition 180 degree sampling is used so that the VFO frequency is 2X instead of the 4X needed for 90 degree sampling.
Some of the features of the board are:  

SN74LVC74 logic for 50Mhz operation

INA163 and DRV135  audio chips for sound card interface

Commercial DC-DC converter to generate + 15 and -15V for Analog circuits

On board XTAL osc for fixed frequency or IF sampling

 +12V only power required

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