[R-390] Killer caps

[Chuck Collins]

Thanks everyone. The mica I saw referenced had to be the one across the 
transformer primary. I changed that out a while back. No difference. 
Changed it again and now at least I have 17 mhz @ 3 volts across 
transformer secondary and faint signals coming in.
  I was hoping there might be another culprit. Will replace C553 and dig 
further into RF deck as time allows. -Chuck