[Elecraft] No power output K2 Part III of assembly

W7is at aol.com W7is at aol.com
Thu Aug 3 03:27:42 EDT 2006


I completed assembly of the K2 all the way through Part II testing and 
everything came  up perfectly.   With the 40M SG2 sig gen I  got a perfect 
S9 receive with the gen set to  50uv and very good  sensitivity of S2 
on the 1uv gen output.   A really hot receiver and all tests  came up 
perfecty. 
 
Then I finished the assembly Part III, taking great care for the placement  of
all parts.  With special care to be sure the toroids were  done correctly. 
  When I went to the final test and alignment Part III,  to  my
disappointment there was no power output on any band and the 40M  receive
had dropped from S9 to S5 when using the Sg2 sig gen on 50uv output. 
There is 250ma receive and 440ma  xmit but no power output into a 
50R dummy load.    The xmit tune 440ma xmit dosnt change at any  power 
control setting.  
 
Receive alignment works on all bands 80 through 10M ...   except  for the 
reduced 
sensitivity after I completed Part III.     So  whatever is wrong is loading 
down
the receiver on all bands.   Instead of S9 on 50Uv output from  the sig gen I 
get S5 and no power out on any band.  

Unfortunately I wont be able to spend anymore time working on it  during
the next 3 weeks.   I spent a lot of tedious time being sure  everything was
assembled perfectly.   So its very unlikely to be a parts  placement
or soldering problem.    
 
Has anyone seen this sort of thing before?
 
Frank W7IS  
 


More information about the Elecraft mailing list