I'm at the building stage of IF alignment for the K2 I'm supposed to hear a signal around 7000 kHz. I hear nothing. I've done the 40 meter filter alignment and checked with an XG 3. The tuning seems spot on, but I only hear the X3 when set t0 50 uVolts. The 1uvolt signal doesnt' get through. Any ideas Tom KI6NRD.