[Mondial]

That's pretty strange. Oscillator is way off at the high end. Does the dial calibration agree with the actual reception freq?

I guess my question is if you set the dial to 1400 kc are you receiving 1400 or actually 1250? Is the oscillator trimmer on the tuning cap tightened all the way down? Seems you have much to much capacitance at the high end of the band.

So you are receiving stations at 600-800 kc but as you tune higher you lose sensitivity?

Before anything else, I would set the dial setscrew first to the correct index, as any error is multiplied at the high end of the band.