[R-390] C227? I can't find it

[Barry]

Hi,

I'm still working on this Amelco RF deck.  I got to looking at the
modification that adds a 47pF cap across the 0.047uF cap (from cathode to
ground) on the first RF amp (V201).  For some reason, the 47pF (dogbone) cap
is there, but the 0.047uF cap isn't.  Has anyone seen this before?

According to TM 11-5820-358-35, C227 is supposed to "prevent cathode circuit
degeneration."   I'm not sure exactly what that means.  Was this cap
intended to prevent the tube from oscillating?  Should I be concerned that
it is missing?

Thanks,

Barry(III) - N4BUQ