[Bruce B]

This is my first post to this forum.  I am here to see if I can find help bringing a Philco 89 121  back to life.  I know we're supposed to talk about radio repair here but first I want to say I studied electronics in the early 60s and used to work on old pre-war radios but it's been 50 years now since I did anything with old radios.  Now I want to get back in and I'm not sure if I remember much.  Not like riding a bicycle.
  So I have been playing with this radio for about a week now.  The radio is not dead it has audio and produces a loud buzz when an antenna is provided and it is quiet without an antenna attached and volume up.  There is no detection of a station signal, just buzz and static.  I got a signal generator and set the coil trimers to 260 KC.  I can here a modulated 1150 KC signal from my signal generator but not anything from a strong station at the same frequency using an antenna,just buzz.   The buzz stops when a signal from the generator is applied.
  What I have done so far is to replace the capacitors involved from the antenna circuit up to the 44 IF.  Nothing has changed yet in the radios performance.
  Other investigation was to ohm out all of the coils from antenna to the 44 IF tube.  All are ohming out to the specs I have.  I got an oscilloscope and am able to see a 260 KC signal on the scope when I place the probe close the the 36 mixer tube so I know it's dancing ok.  So this is about what I have done.  I will continue to replace caps till I have done  them all.  It has been quite tedious but interesting to figure out how to replace capacitors inside those bakelite boxes.
  One thing that would make my life easier is to have a schematic and parts list that works for the radio I have.  I have a schematic that so far fits the radio I am looking at but the drawing calls one value of capacitor and when I trace it down I find a PN on a block and when I look the blocks specs up the value might be different.  I replace with the value I find in place, not the value in the drawing.  I have also been taken down a rabbit hole over a capacitor bank (drawing part 4) showing .09 uf of part 4 going to a location but whenbthat location is traced out I end up with a potted capacitor that did have a .09 uf value.  I haven't looked yet as to where the capacitor bank is really wired?  I'll get there.  My radio is a model 89 code 121 and uses a 36 mixer tube.  The Riders manual I am using shows a 77 mixer. So I am confused ? but I am proceeding with it for now.  If anyone knows where I can locate a drawing and parts list for my 36 tube it radio it would be nice.  Also I looked around for a drawing that would have suggested voltages at the tubes, I don't know if such exists but it would be nice ? 
  So I hope I didn't get to wordy.  I hope I have explained what I am doing and for some patient Pearson to make suggestions about how to approach what I have gotten into.
Bruce B