Thanks, I modeled the LM336 and get almost the same measured curve at low frequencies. I'm on my way over to 40m in a matter of minutes to remeasure the noise with a lower noise amplifier to see if the entire curve can fit. I also have the model attached - the strange graphing frequencies were to match the ones I got with the measured data. I am also going to double-check the opamps used in the circuit currently. I already verified the resistor values - only R18 was incorrect (1k instead of 390).

# All noise
  # Naming convention due to repeat pin numbers
    # All points not at a test point labelled with n number of the next test pin _ pin number ie n6_3
    # All test points labelled by TP(number) ie TP4
    # All points with no pin number labelled with preceding pin number, following pin number ie n7_26 (between 2 and 6)

# Wide SW to amplifier

  # Up to TP6