[Milsurplus] Mystery Collins Modules

[Jim Whartenby]

GreetingsThe following assemblies came as part of a 310F-1 I have had for a few years now.  The following audio modules don't appear to be original to that system.  They appear to be of a much later design then similar audio modules found in the KWT-6.  Does anyone recognize any of the following?  Are manuals or schematics available?

MT-2119 (XW-1)/TContains at least one of the following solid state 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 522-1403-004
PP-2225 (XW-1)/T also came with the 310F-1.  Inside is a PP-526H-1 power supply so at first glance, this is just a repackaged power supply  What system used it originally?
A little bit of digging found very similar systems to the 310F-1 in the Collins Signal issues found on the CCA site.  It appears to me that the 310F-1 Receiver-Exciter uses identical assemblies to the OA-1446 Exciter and/or a single receiver section of the OA-1447 Dual Diversity group.  photos were found in the Collins Signal Volume VII No. 2 (Fall, 1958) in the Birdcall article.  
It seems that the 310F-1 is a repackaged rack mounted ground based version of the R-671/ARC-58 with the addition of a motor-generator needed to make 400 cycle power for the servo tuning.   It seems to predate the KWT-6.  Can anyone verify this?
Does XW-1 signify experimental or a special order?Regards,Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?
  
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