SDR receiver + CW Transmitter

Hi, This project is realized idea from LZ1VF (My friend Valeri) . I want to make something equal - Chinese pre-build RTL SDR HF receiver (for $26.88) with new/different transmitter section based on my before projects - especially last transmitter stage from Forty2 (French QRP project). I will add modified arduino sketch - The Peppermint Bark BITX40 VFO , from KC1FSZ  (also will add Si570 support - I'm still have unused one, and other staff). This sketch have Yaesu FT-817 emulation to connect arduino with many HAM software like N1MM+ , fldigi and other.

Receiver will be this RTL SDR:
100KHz-1.7GHz full band UV HF RTL-SDR USB Tuner Receiver/ R820T2+8232 Ham Radio

 

Transmitter:

RF amplifiers with LPF for 20m (14 MHz - this is my target band for day activity):

Arduino control (like PA0RWE schema without buttons - I don't need if control freq from notebook). This will be simple QRP transceiver, for mobile work, from My car:
 

TXOscillator is ready. Now Arduino is connected with software. This example picture is with fldigi, but I'm tested also with N1MM+

The source code/sketch is ready in My github based on Bruce MacKinnon KC1FSZ , The Peppermint Bark BITX40 VFO.

ALL SOURCES AND SCHEMATICS:

https://github.com/LZ1DPN/SDR-cw-transmitter

73 ES MNI DX'es!LZ7DP

uBitx ver. KMK 2017

After 2nd build, I think that uBitx is not mine transceiver. I prefer to work on CW mode and this SSB wide receiver is not so good for me. Idea to use Si5351 is another mistake who will be revealed after months from all hams. TDA2822 is another mistake. In this way transceiver sounding very bad, digitally, noisy and I don't like it. I'm sell all pcb boards, and go away to next project.


This transceiver is Farhan's uBitx mod - 10 watts, easy to build, general coverage SSB/CW transceiver for HF bands. Pcb is made from CM2KMK 2017 mod version.

Video from first receive test:

How to reduce OLED display noise :-)

Last World RTTY contest with uBitx:

http://www.phonestack.com/farhan/ubitx/ubitx.html

 I found 1 mistake in PCB (capacitor is shorted in my pcb):

 Farhan's  uBitx schema:

They have some difference in transmission section - especially in RF driver and PA.
I found it original schema in French QRP transceiver Forty2 -  http://lpistor.chez-alice.fr/imagesite/radio/docs/Forty2-1.pdf

ALL SOURCES AND SCHEMATICS:   

https://github.com/LZ1DPN/uBitxKMK2017 


73 ES MNI DX'es! LZ7DP