YO4HFU
PIC-A-STAR HF TRANSCEIVER

HIGH PERFORMANCE HF SSB/CW TRANSCEIVER WITH DSP
designed by Peter Rhodes, G3XJP

Under construction 25 september 2013 - ....
Last update 22.10.2014

Photos Gallery

IF PCB, IF - TOP, IF - BOTTOM
TrxAVR TOP & BOTTOM
DSP BOARD 1
, DSP FINAL, DSP BOARD 2
DL4JAL MIXER

G6ALU 20W AMPLIFIER

 

Some photos with a Spectrum Analyser connected to IF Board (Tx Mode, 16KHz Sinusoidal Signal / 1Vpp injected into the Input RX Right AF/TX)
10,7MHz signal with its harmonics, Spectrum Analyser connected Before the Crystal Filter.
10,7MHz signal After Crystal Filter, This Filter and L match circuit, rejects rich harmonics generated by mixer.
SA connected Before Crystal Filter, Wide View ~200MHz.
Close View Before Crystal Filter, Local Oscillator signal is lower by about 30dB compared with the products of mixing.

After some modifications: (02.01.2014)
15KHz full power - TX Diplexor
J310 bidirectional amplifier - original version
J310 bidirectional amplifier - with 47 ohms source resistor
2 x J310 parallel - with 2 x 47 ohms resistors
PIC-A-STAR MODIFICATIONS - Schematic


PIC-A-STAR PORTABLE VERSION

-Designed only for 28MHz SSB-CW/ Transverter Operation
-DSP,CODEC and IF PCB's are
redrawn to the smaller size: >>DSP/CODEC<< , >>FI BOARD<<
-DL4JAL Controller (LCD 4x20)
>>LINK<<
-Clean TX (100mW)
-DDS AD9951 / CLK 400MHz
-I intend to use it for 2m band, especially portable.


For other info about this transceiver:

Join the 'PICAPROJECT' Yahoo User Group at http://uk.groups.yahoo.com/group/picaproject/
TrxAVR Controller
TrxAVR INFO

 

 

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