[Elecraft] 40M band pass filter alignment - very little signal getting th...

[G3VVT at aol.com]

In a message dated 12/02/05 20:13:17 GMT Standard Time, kg4htt at juno.com  
writes:

All of  the checks were in the expected range, except for U6
pin 8, which was 36.8  ohms instead of greater than 100 ohms


---------------------------------
 
Check that RFC14 on Q19 source has been fitted to the correct position.  
There is an adjacent ground through hole that if used by mistake will reduce the  
U6 pin 8 (8B rail) reading by 270 ohms as R20 then is effectively shorted  
out. Otherwise it is a matter of breaking down the direction of the loading of  
this reading. There are series resistors in some of the paths that can assist 
to  this end.
 
Bob, G3VVT