Total posts : 45366
A kind of odd page there, going from white to aqua green as you go about your reading, maybe they got an art student in.
With the single gang variable capacitor, that reminds me of the kit I built once, that used a Ferranti chip, I think it was ZX414? It was a newer version of that chip though, 3 transistors, and the front end tuner circuit so lightly loaded that the Q and selectivity is high.
That’s what I think of when I hear TRF. Might be like that, with refinements that make it good for wideband local reception. Add CQUAM! 🙂