You can monitor the voltage applied to the grid of the 6E5 (pin 3)... it takes about -8 volts to close the eye completely... if you are not getting that, the agc circuit is possibly not working correctly or signals are weak or set needs alignment. If you are getting -8 volts on the grid when the radio is tuned to a strong station and the eye is not closing, suspect the 1 meg resistor.
Looks like you only have 2 very strong stations:
http://radio-locator.com/cgi-bin/loc...req=&sort=freq
jr