[R-390] Low Carrier Level Meter Reading

[W9zr at aol.com]

I recently purchased a low mileage original 1967 EAC R390A.  It has not been 
touched and all the modules and tubes are original and it seems to play well.  
I have checked all the tubes and replaced a few gassy ones.

With .1uv from my HP signal generator I can hear the signal fine which means 
that the sensitivity is very good.  However, with 100 mv from the generator 
the carrier level meter reads 20 db which is way too low I believe.  What would 
be a typical meter reading for this level of signal?  Is there an adjustment 
for this other than the gain adjust pot on the top of the IF deck?

I am a newcomer to the 390A and before I start to digest the manual I thought 
that perhaps someone could point me in the right direction.

73 Randy