What are your supply rails? The LM747 will tolerate 22V supplies, which is more than most opamps will take.
The AD8513, AD8674 and OP470 may be worth a look as they all have better performance. I don't know about Mil spec though.
I have a task to optimize noise in BW 10Hz - 10kHz.
Voltage gain shall be around 20..50. OA connected directly to source of signal,
which has impedance 1kOm DC and 50Om AC. OA connected to middle point of R1/R2 divider,
where R1 connected…
I wish you would have gotten a name so I could track this down further. Was it a local field office
or an office in Norwood? Which department? That is certainly unacceptable behavior.
I was the product line apps engineer for the ADA4627-1.