[rfeenstra]

The schematics that I have for both the 55 and the 55f show 2 chokes plus the field coil, and 3 caps in the filtering section. One of the caps is shown to be a 4 mfd on the schematics, but physical examination of the 3 larger caps in the can are all about the same size so I doubt that one of them is 4 mfd.  Also, I found it interesting that the field coil in the 55f is in the filtering circuit. On the 55, one end goes to ground.  It seems they were working hard to reduce ripple on the 25 cycle sets.  I think I'll just use all 2 mfd caps in the filtering section and hope for the best.  My bigger concern right now is the stupid audio driver transformer.  I saw some AK transformers on ebay, but not what I needed - Rats!