[Hammarlund] HQ-170 antenna connector, i.f transformers

[J G]

Hi,
Many, maybe most or all, of the HQ-170 receivers I see have SO-239 antenna connectors on them.  Were these "factory original"? Or, were they added by the receivers owners?
 
Also, is there somewhere published a diagram showing which i.f. transformer can is which by "T" number? My HQ-170, s/n 5006, has some problems and I am not certain I have the locations sorted out.
Thanks,
Jim