Thursday, April 27, 2017

LZ1DPN CW Transceiver with Si5351



QRP transceiver LZ1DPN-CW2 for 3.5, 5, 7, 10 and 14 MHz CW operation. This transceiver is based on Small Wonder Labs SW 30/40 schematics. I also use parts from my before projects - from EK1A homebrew copy, and realize some changes in schematics and source code.

This is 5W QRP transceiver. Receiver work on all HF BANDS, but transmitter has band limitation from LPF and driver transistor BD139. RF amplifier with IRF510 is tested and worked well to 10W RF Power, but need more cooling with fan, and power consumption is too high for QRP/mobile activity.


My temporary best DX QSO record with this transceiver on 7 MHz (my QTH locator is KN32SN) is: with EF8U - 4161km. EA8BMG - 4161km  (Gran Canaria Isle), EF0F, EF5T, EA5WU, EA1RKV - 2696km, EC5CR - 2695km (Spain),  MD0CCE - 2667km (Isle of Man), R70SRC - 2634km (Russia).



My last contest with this QRP transceiver from locator KN32SN:
"His Majesty The King of Spain CW Contest 2017"
https://concursos.ure.es/en/contests-search/?qrz=lz1dpn 


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Homebrew copies of Small Wonder Labs SW, and EK1A in my shack.



SOME PICTURES:






ALL SOURCES AND SCHEMATICS: 

73! & BEST DX!
LZ1DPN