[Elecraft] Removed (K2) Noise Blanker

[garyhvizdak at cfl.rr.com]

Chris wrote ...

I bought my K2 on the used market and I realized that the previous owner had removed the Noise Blanker and W5, R88,R89 and R90 were not reinstalled. Does this affect rx performance? Should I install these parts again?

--

Chris,

    Is there an un-module header in place of these parts?  If not then your K2 ought not operate at all.  Also, the instructions for installing the KNB2 have you remove the three resistors but then replace R88 with a 2.7 k resistor and R89 with a jumper wire.  However, even with these changes your K2 still ought not work.  Is it possible that someone put one or more of these parts on the bottom of the RF board?

    FYI, for an understanding of these changes look here ... http://www.unpcbs.com/resources/#gotodiagram  (Actually, you will probably find the entire website usefu.)

73,
Gary  KI4GGX
unpcbs.com webmaster