PA0O ham radio

EU1KY its fb  Antenna Analyser project the software  is still further developed The latest fw 040  KD8CEC  offers even FT8 and other digi modes TX   Will need i2c  GPS clock and the frequency has to be corrected in the 200Hz window for WSPR                                           STM32F746G Discovery board used in  EU1KY A.A. Nice but some boards have a short circuit issue with JP2 external 5V supply. The soldering of this JP5 pins caused short to mass.  The jp2 solder pad above has an extreme smal isolation gap,  just a few 0.01 mm !  And the mass plane around it has a small edge of the mask uncovered ! Almost impossible to avoid solder bridges. Both of my Discovery board's suffered short circuit right out the box. I heard of at least 2 other cases. This is a weak spot, i would say a design flaw....

PTT connected to KEY-OUT pin10  180R  protection. 13.3V to main single pin power (on board 220R are used to pass signals to the ACC pins as protection )  SMA  144 port Building this 144MHz XVTR  into the K3 project kept me in the warm shack. Since the nice summer type weather ended here last Friday the sky turned grey and we are back to cool windy rainy weather. Same time ES dx Disappeared I now strong believe the ES clouds are fed with sunny sommer weather gasses that rise up into the ionosphere... Some time ago I bought the "Ukrainian"   XVTR 144MHz  And now it works,  had  first contact's at 144.174  in FT8 I seached some victims for the first 144MHz contact,  the whole 144- 146 empty but still life ? or should I say robots active... on FT8 144.174 Meanwhile weather has changed again in to summer  and so  the propagation. Since the K3 144 transverter is running I had remarkable good results w...