[Collins] Mystery Collins Modules

[Jim Whartenby]

The following assemblies came with a 310F-1 but don't appear to be part of that system.  Does anyone recognize any of the following?  Are manuals or schematics available?
MT-2119 (XW-1)/TContains at least one of the following audio amplifiers:Speaker Amplifier, AM1974 (XW-1)/T, CPN 522-1401-004Line Amplifier, U310-6, CPN 522-1364-00Line Amplifier, AM1975 (XW-1)/T, CPN 522-1403-004Were the above audio amplifiers used in the Birdcall system?
PP-2225 (XW-1)/TContains:PP-526H-1  What system used this power supply?
It appears to me that the 310F-1 Receiver-Exciter is functionally identical to the OA-1446 Exciter and/or a single receiver section of the OA-1447 Dual Diversity group all of which are automatically tuned just like the R-671/ARC-58.  
This information was found in the Collins Signal Volume VII No. 2 (Fall, 1958) in the Birdcall article.  It seems that the 310F-1 is also a rack mounted ground based version of the R-671/ARC-58 and most likely predates the KWT-6.  Can anyone verify this?Regards,Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?