Good afternoon
Thank you very much for your help.
In reference to what was indicated by Alan, G4ZFQ: I have used an eyeglass (Loupe) to check all his solder, maybe a solder splatter or a mustache with no results. I have not raised pin 8 for fear of breaking the IC.
Mike W6MXV, said to check the IC 74AC74 orientation: I think that is correct.
Gyula HA3HZ said that it is interesting to put a photo "more eyes would see more", I agree, so I will send some images of the work.
My sincere thanks to Tony Parque, KB9YIG. I would like to show my great admiration for you.
When I finished the RX OpAmps stage and started up the receiver, it almost felt like forty years ago, the first time I built a receiver with a germanium diode, a capacitor, a coil, and a large wire antenna.
After completing the first part, "PWR Supply" I learned that I would need a magnifying glass and a solder station.
All the construction phases I have completed successfully, with the correct checks indicated and with a surprising reception - for me - when arriving at the part "RX OpAmps"
In the following link: I send two small videos with the operation of the Softrock RXTX when I completed the RX OpAmps stage.
In the following link: I send the board images with the completed job to TX OpAmps. This is where everything stopped working and the wrong voltage problems have appeared.
As can be seen, the work in the area of the power supply is not clean, especially after breaking the original LM78L05 and replacing it with a 7805 "on air"on the underside board. The solders on the u6 and u7 ICs are also not very visible due to an unsuccessful attempt to remove them, but this has not affected the operation of the Softrock RXTX.
I sincerely appreciate your help.
Many thanks.
José María, EA4B
