I have a Hallicrafters S-120 1960s vintage vacuum tube receiver (an "All American Five" superhet with solid state rectifier replacing one of the "five" tubes). It works well, doesn't have excessive internal noise, and seems very sensitive (with the regenerating IF used for "exalted carrier" on AM, and as a BFO for CW and SSB).
I've considered using this as a secondary receiver, for some version of "split" operation.
The problem with that is that, while the tuning is plenty precise (with the Bandspread control allowing several turns of a secondary tuning knob to cover a few hundred kilohertz), the tuning indicator needle is significantly off the actual tuned frequency (correctable) and doesn't move at all when using the Bandspread. I had the idea to connect a digital frequency display, which would allow me to see exactly where I'm tuned. I have such a display on hand, built from a kit.
The only place I see to get current tuned frequency from a superhet receiver is to tap into the local oscillator. Am I correct in thinking this will give a frequency 455 KHz below the actual tuned frequency?