[Milsurplus] Anyone have RBM-5 parts or parts chassis?

[hwhall at compuserve.com]

Does anyone have or know of the whereabouts of parts for the RBM-5 receivers? 

I have the MF and HF sets but the HF set is missing a number of original parts, though it is working. Somewhere along the way it was modified, removing the audio filter inductors, the original two-part volume & OL control, the audio output transformer, and a few other bits. I'd like to put it back the way it was supposed to be as much as possible.

Also, I'd like to hear from anyone who might be familiar with the modification that was done. The audio stages were changed from a string of three tubes 12SK7 - 12SJ7 - 12A6 to just two 12J5 - 12A6 and a different output transformer to drive speaker impedences instead of headphones. It's possible the first two stages were changed to just one because the attenuation of the audio filter had been taken out. I've tried googling for that modification but haven't found it. Anyway, my intent is to get back to the original arrangement.

Thanks & 73,
Wayne
WB4OGM