Removed Noise Blanker

[OE5CSP-Chris]

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?

73, Chris
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[Don Wilhelm-4]

Chris,

If your K2 does receive, there must have been something installed in
place of the noise blanker.
Normally, without the KNB2 installed, R88, R89 and R90 serve as a 6 dB
pad following the post mixer amplifier.  If the 6 dB pad is not
installed (such as a simple jumper installed), the receiver would
function, but the termination of the post-mixer amplifier and IF filter
input would not be correct, so the dynamic range and IMD could be
compromised.  Check to see if there is that 6 dB pad connected anywhere
in the vicinity of the KNB2 loaction - if it is not, then restore the
original resistors.

73,
Don W3FPR

Hans-Christoph Scheiblberger 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?
>
> 73, Chris
>  
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