[Arran]

I looked at the schematic, it's a nice set in that it has a pair of push-pull 6V6s but not a particularly elaborate one in terms of the front end. By the looks of things it's not much different then a typical 5 tube AC set, two IF cans, an oscillator adjustment, and an antenna adjustment for each band. According to the schematic the IF is 460, so nothing really unique there, likely you feed the test oscillator signal into the antenna through a .1 mf cap and adjust accordingly.
Regards
Arran