[Milsurplus] need info 440hz xfrmrs and OS-10/U

[ejones at hiwaay.net]

de N4TGC Eric

Last Aug., at the Huntsville Hamfest, I bought a pair of home-brew power
supplies built into some project boxes.  The odd part was, the heart was a
Hazeltine #TR5RX02ZZ 890484 transformers, one winding 52vct, 680ma, the
other 115v, 380-420 cps.  So are these intended to take 26vac 400hz, and
produce 115v for some aircraft eq.?  Or vice versa?  Wasn't there some
discussion awhile back about how to build a 400hz oscillator to drive
something like this?

Recently, I finally made it over to Atlanta, GA to pick up an OS-10/U
oscilloscope I'd 'won" off ebay, and was surprised to find it was not
conventional military: it was made by Hickok for the Civil Aeronautics
Admin., 15 Dec 1949, contract #Cca 28166.  Should I bother Fair Radio, or
does anyone have a manual for it handy?  I like the "RBA" -style knobs it
has ... e