for OM0AAO : If I understood correctly, carrier balancing is done using the CW trimmer ? If so, I shot with it and when I have it in the middle I have the least tension (but not zero )originating from SA612 . Maybe I'll add some photos of my bizarre progress. on an oscilloscope. Because the SA612 already emits a key when pressed, like a carrier frequency and probably a VFO in it (or BFO ? I don't know, the signal is really small, so I have no idea what it is). It looks like the course of a higher frequency that oscillates at the carrier frequency. Of course, when it passes through the bandpass of the first stage at the output, the higher frequency does not appear.
I have ferrite toroids. There is also blue flak on them. Ale urcite su feritove. I have them from another Datal TRCVR that I received and it was in a working condition. It was on 80m, just like my Antek. 1cm outer diameter, 10of bifilar e winding with a lacquered wire of about 0.3 mm.
IRF 520 I have a quite large cooler with fins that is soldered on the flat connection to GND. He hasn't broken a sweat yet when I play with him.
For OM2AMB : Well, according to the first link I posted on this topic. If you open it right away, you have a photo of the built device. Of course, I also looked at SP5DDJ's site, who got 7W SSB from it. He has photos there, he also has such capacitors.