[R-390] R390A to R725 conversion question

[Perry Sandeen]

List,
IIRC I've seen 3 published articles for r390a to r725 conversion all using the re-wiring of the R390 IF to 6 volt filaments.  This seems to be a big PITA.
When the military did the original they just added another 26 volt filament xformer. This seems a much easier approach especially when we have small SRPS's available.

If anyone would have the schematics or TM addendum I would appreciate it if they would contact me off list.
TIA
Perry