[Drake] R4C Low sensitivity

[Garey Barrell]

Scott -

The calibrator is not a good indicator of receiver sensitivity.  You 
need either a good signal generator or something like the Elecraft 
XG-1.  I don't know how I ever got along without it!   Well, yes I do, I 
have a room full of test equipment.  But more often than not, I can tell 
all I need to know about a receiver's general condition with just the 
little XG-1.  And it's a LOT lighter!

<http://www.elecraft.com/mini_module_kits/mini_modules.htm>

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
<http://www.k4oah.com>



Ka9p at aol.com wrote:

>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
>
>  
>