[Drake] R4C Low sensitivity

[Ka9p at aol.com]

Well, just couldn't do without an R4C any longer and picked upa fairly nice 
one, but am curious about sensitivity.

Its a 225xx SN with the 6EJ7 mixers.  WIth an antenna connected, atmospheric 
noise peaks up fine everywhere, and the cal signal (no antenna) is about S8 on 
10 going up to about 10 over on 80.  I've touched up the alignment and that's 
all it will do, and changed out a 6EJ7 that seemed weak.  It's very usuable, 
but not quite my recollection of what to expect.

Does that sound like the overall gain is till low, and are there any quick 
and easy solutions for isolating what stage might be underperforming?

Thanks, Scott