[andrekp]

BTW, my testing suggests that the local oscillator is faily close to being right on. Using a digital radio, the 42-324 tuned to just barely under 600, oscillates the digital at 1060, while the 42-321 tuned to about 1000, oscillates the digital at 1450. However, 1700 on the digital is oscillated by about 1210 on the 42-321 (which is obviously off by about 30-40kc)

So to me, this implies that my local oscillator is probably acting as it should - and is close to 455kc, but that for some reason the upper part of the band is off.