You had ADF? You lucky guy!
We had to find the cone of silence, turn to the appropriate heading,
and make a timed descent to visual contact with the airport.

IIRC, our ADF was useless when shooting an Adcock range approach,
which is what you seem to be talking about. We flew to the high cone,
did a procedure turn, descended and flew to the low cone, than, as you
say, took a heading to the airport.

ADF approaches had no "cones." As I recall, we often shot them using
commercial AM radio stations. Perhaps those were just practice
approaches, not actual approaches in IMC. It was half a century ago,
and I don't recall all the details perfectly.

I don't remember the minima, but I think they were higher than 200+1/4.

Ours were, of course, if the terrain required, but could be as low as
200 and a quarter.

vince norris