YO4HFU
DDS AD9951

 

This DDS is optimised for 28MHZ (Output=10,7+28MHZ)
Works in 10m All Mode Transceiver.
Use 400MHZ Oscillator for low phase noise(disable internal multiplier).
Output carrier (39MHZ) measured with spectrum analyser: X6 multiplier or 400MHZ Oscillator.


Photo:
Clock Oscillator, Clock Oscillator Box
DDS AD9951(2),Amplifier 39MHz,Clock 400MHz(photo from HF transceiver)



DDS AD9951: schematic(bypass T1), pcb, components position, SprintLayout file


Controller ATMEGA-8: schematic, pcb, components position pdf or jpg, SprintLayout file, hex file replaced with DL4JAL Controller
Details about Atmega 8 controller: CQHAM FORUM


400MHZ Oscillator(66,66MHZx6 +helical filter):schematic, pcb, components position, SprintLayout file,
Output spectrum (10dB/div): Oscillator 66MHz & 80MHz


Output Amplifier & Bandpass Filter(~39MHZ): schematic, pcb, components position, SprintLayout file

Rotary Encoder with step motor: schematic, pcb, components position, SprintLayout file replaced with Optical Encoder

 

 

 

 

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