HF SSB DIRECT CONVERSION RECEIVER HOMEBREW - 40M 80M 20M BAND PINOY BUILD

hi there i have my home brew high performance direct conversion high frequency receiver
the signal coming receive in band pass filter L1 and L2 is a good filtering interference in your neighbor broadcast radio station.
for the signal good receive is to amplify of  two transistor TR1 and TR2 number S9018 is rf receive amplifier and mix to AD9850 signal generator control arduino in balance mixer MCSRA-I
after mixing receive signal then going to MCU741 operational amplifier to filter high frequency and
followed in LM833N operational amplifier is to filter low frequency going to TR3 S9014 detector drive amplifier going to R25 trimmer resistor for adjustment audio clipping then audio frequency gain is volume control to IC1 AN7112 1watt audio aplifier

the AGC automatic gain control is connected in C23 1 micro farad 16 volts electrolytic capacitor is the output of LM833N the agc output is connected to input of TR1 its means the signal output from LM833N return to rf rx amplifier

RF SIGNAL METER stage also connected in C23 1 micro farad 16 volts  input in two transistor TR6 and TR7 number S9014 then out to the signal meter 
 

my front panel controller using AD9850 signal generator and arduino atmega 328p and the signal

meter is from my old uniden grant xl cb radio transceiver                                                                

                         

    the schematic diagram 20 meter band direct conversion hf receiver is my own design.

 
    you can see the video in my you tube channel for the test in 20 meter band.
    https://www.youtube.com/watch?v=DJlb1Jn8kPM
 



                               picture of my prototype home brew direct conversion hf receiver

i am using universal pcb board of my high performance hf direct conversion receiver

  

                   hf ssb homebrew, qrp transceiver arduino dds, 40m band, DU9KQQ